Harness the power of ChatGPT: a new assistant for developers

In today’s fast-paced world of software development, the need for reliable assistance and guidance is paramount. Developers often face complex challenges, seeking solutions that are both efficient and accurate. Enter ChatGPT, a groundbreaking language model developed by OpenAI. With its vast knowledge base and natural language processing capabilities, reaching out to ChatGPT for assistance offers a multitude of benefits for developers.

1. Expansive Knowledge: ChatGPT is built upon a vast corpus of information, including up-to-date knowledge across various domains. With a knowledge cutoff in 2021, it has been trained on a diverse range of topics, making it a valuable resource for developers seeking guidance on programming languages, frameworks, algorithms, and more. Its ability to tap into this wealth of information allows for swift and accurate responses to queries.

2. Quick and Responsive: ChatGPT operates in real-time, ensuring developers receive prompt assistance when they need it the most. It is available 24/7, eliminating the constraints of time zones and allowing developers from around the globe to benefit from its expertise. Whether it’s a late-night bug hunt or a pressing deadline, ChatGPT is there to provide support, helping developers overcome obstacles and move forward with their projects.

3. Tailored Solutions: ChatGPT’s adaptability is a key advantage. It can understand and respond to natural language queries, allowing developers to express their problems in a way that feels natural and intuitive. This flexibility ensures that developers can receive personalized assistance, tailored to their specific needs. Whether it’s debugging code, understanding complex concepts, or exploring best practices, ChatGPT can provide insightful guidance.

4. Learning on the Go: With each interaction, ChatGPT learns and improves its responses. As more developers reach out for assistance, the model refines its knowledge base, incorporating new information and refining its understanding of developer challenges. This constant learning process ensures that ChatGPT evolves alongside the ever-changing landscape of software development, providing up-to-date and relevant guidance.

5. Developer Community Empowerment: ChatGPT serves as a catalyst for collaboration and knowledge sharing within the developer community. By providing assistance and resolving queries, it encourages developers to share their experiences and insights, fostering a vibrant ecosystem of learning and growth. Developers can not only seek assistance but also contribute to the collective knowledge by sharing their expertise, further enhancing the value of the platform.

In conclusion, reaching out to ChatGPT for developer assistance offers a range of benefits. Its extensive knowledge, responsiveness, tailored solutions, continual learning, and community-driven nature make it an invaluable tool in the developer’s arsenal. By harnessing the power of ChatGPT, developers can overcome challenges, accelerate their projects, and unlock new levels of productivity. Embrace the future of developer assistance and tap into the potential of ChatGPT today.

rsync – fast and easy way to copy files to another server

Before making changes, it can be helpful to save the files in a safe place so that you can restore them. The rsync utility will help with this task, which minimizes traffic by copying only the changed parts of the files.

First of all, let’s install the package on both servers, if it doesn’t already exist. We use the following command:

sudo apt-get install rsync (for CentOS use yum instead of apt-get)

To copy from a remote server, we naturally need access to it, since we will have to enter a password before starting copying. In our example, the data will be copied from the directory /remote/source to /local/destination and if the directory does not exist, it will be created, and the files existing in it will not be overwritten:

rsync -avzP --stats [email protected]:/remote/source/ /local/destination/
  • -a saves information about dates, symlinks, and file permissions
  • -z archives data
  • -v increases the verbosity of messages during program operation
  • -P combines “progress” (show progress while copying) and “partial” (to continue copying when the link is broken)

If you want to make sure that everything goes well, you can additionally add the “dry-run” option – in this case, the utility will start a simulation of copying with a log entry, but the actual copying of files will not occur.

To copy to a remote server, set up a connection for the directory where the copy will be made:

rsync -avzP --stats /local/source/ [email protected]:/remote/destination/

Note about the closing slash:

When specifying the path to a directory as a source, you should pay attention to the closing slash – the character / at the end of the directory name. The closing slash means the inner content, i.e. if /source/ ends with a slash, rsync will copy the contents of /source/ to /destination/. But if there is no slash in /source, then rsync will create a dir directory inside /destination/ and copy all the contents of /source/ to /destination/source/. Hopwever, the presence or absence of a closing slash in the name of the directory to which the copy will take place does not matter.

Sources:

  • https://help.ubuntu.com/community/rsync
  • https://www.servers.ru/knowledge/linux-administration/how-to-copy-files-between-linux-servers-using-rsync

Bulk reduce the size of images with ImageMagick

With the rapid growth of the resource, it can be difficult to keep track of the correct processing of images: images are loaded randomly, which negatively affects page loading speed and takes up extra space on the server. You can fix this situation using the ImageMagick utility. Its toolkit is very extensive, but we will focus on the most important points. It will not be superfluous to also recall that before starting processing, just in case, it is worth making a backup of the images.

  1. Install the package on the production server: sudo apt install ImageMagick (Use yum instead of apt in CentOS)
  2. To make sure that the installation was successful, we execute the command identify -version and look at the version of ImageMagick

For the most effective tool for reducing the weight of images, let’s take their quality reduction-quality, set the quality to 50% of the original. It should be borne in mind that ImageMagick is not sharpened for processing png images, so let’s tell it that it needs to work only with jpg images: -type f ( -name “*.jpg” -o -name “*.jpeg” ).

  1. We move to the directory with images and get ready to start processing, the full command will look like this: find . -type f ( -name “*.jpg” -o -name “*.jpeg” ) -execdir mogrify -quality 50 {} +
  2. After the command completes, we check the images. The program had to process, including files in nested directories

Please note: when copying the above commands, make sure that the quotes are simple, not curly.

We have considered a special case of working with quality reduction, but there are a lot of tools: the -resize command is used for resizing, -crop is for cropping, -format is for changing the format, etc. A complete list of all ImageMagick features can be found in the official documentation.

Preparing a VDS server for Bitrix

Starting tasks on bare VSD

Tools

  1. Pytty + configured ROOT connection
  2. Hosting + Account
  3. WinCSP + configured connection
  4. Notepad++

User preparation

In Ubuntu, it is highly discouraged to work under the ROOT account, so first we will create our own user with sudo rights

  1. List all users: nano /etc/passwd
  2. Create a new user with console sudo useradd -s /bin/bash username
  3. Set password for user sudo passwd username
  4. Make user sudo usermod -aG sudo username
  5. Login as username.
  6. Create a home directory: sudo mkdir /home/username
  7. Reconnect with user rush
  8. Add the user to the www-data group sudo usermod -a -G www-data username

Software installation and system update

  1. Get information about the latest package versions: sudo apt-get update
  2. Install MC: sudo apt-get install mc
  3. Install tasksel: sudo apt-get install tasksel
  4. Install git: sudo apt-get install git

Installing LAMP

  1. Running installation sudo tasksel install lamp-server
  2. Generate mysql password using http://www.onlinepasswordgenerator.ru/ – 10 characters with special characters
  3. Filling in the password on the “Project Information” board
  4. Set the mysql root password in the console GUI
  5. Installation will complete
  6. Starting Apache sudo /etc/init.d/apache2 restart

Apache setup

  1. Check availability by ip – in the browser as the IP address of the server. If everything is ok – show the page Apache
  2. Create a copy of the Apache configuration file
    sudo cp /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/yoursite.conf
  3. Connect to the server via root account using WinCSP
  4. Create a site folder via WinCSP or console
  5. Create a test index.html in the site folder
  6. Edit /etc/apache2/sites-available/yoursite.conf

    ServerAdmin [email protected]
    DocumentRoot /var/www/yoursite
    ErrorLog /var/www/yoursite_error.log
    CustomLog /var/www/yoursite_access.log combined
  7. Deactivating the old site sudo a2dissite 000-default
  8. Activating a new site sudo a2ensite yoursite
  9. Apache restart sudo service apache2 restart
  10. If everything is OK, then when you go to ip, our test page will be displayed.
  11. /etc/apache2/apache2.conf

    Options Indexes FollowSymLinks
    AllowOverride All
    Require all granted

Configuring Apache Modules

  1. sudo apt-get install php-mbstring
  2. sudo phpenmod mbstring
  3. sudo phpenmod mcrypt
  4. sudo a2enmod rewrite
  5. sudo a2enmod ssl
  6. sudo service apache2 restart

Installing phpmyadmin

  1. sudo apt-get install phpmyadmin php-mbstring php-gettext
  2. sudo service apache2 restart

MySQL setup

  1. In /etc/mysql/conf.d file
    [mysqld]
    sql_mode=ONLY_FULL_GROUP_BY,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVI
    SION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
  2. sudo service mysql restart

Setting permissions

  1. We need to set the owner/group for the root directory (and any internal directories and files): sudo chown -R www-data:www-data /var/www
  2. So that no one except the current user (www-data) has access to the contents of the web-root directory. sudo chmod go-rwx /var/www
  3. Next, you need to allow users from the same group (and ‘other’) to open the /var/www directory sudo chmod go+x /var/www
  4. Next, change the permissions of all directories and files in the root directory for the same group (www-data): sudo chgrp -R www-data /var/www
  5. Use chmod commands to make it so that only one user can access content: sudo chmod -R go-rwx /var/www
  6. Make it so that any user in the same group can read/write and execute directories and files in the root directory on the server: sudo chmod -R g+rx /var/www
  7. Personally, I gave the group write permission – this is necessary for those users who edit content. It looks like this: sudo chmod -R g+rwx /var/www

php setup

/etc/php/7.0/apache2/php.ini after changing – Apache restart and check via phpinfo.php

  1. short_open_tag = On
  2. mbstring.internal_encoding = UTF-8
  3. mbstring.func_overload = 2

Site transfer to Bitrix. Preparing to deploy a backup.

Often the server bears the name of the domain that will be spinning on it. This gives rise to the following problem: ping from the VDS server to the domain goes to 127.0.0.1, and to deploy a copy, you need to knock on the “hosting” IP address by the domain name.

To edit in the /etc/hosts file of the VDS server, write a line like
87.236.16.31 yoursite.ru

And comment the line like
127.0.1.1 yoursite.ru yoursite

to make it look like this:
# 127.0.1.1 yoursite.ru yoursite

save and run check
ping yoursite.ru

After deploying the backup, we return everything as it was! Otherwise, when changing edits, edits will be made to the “old” battle site.

Preparing a backup on combat

  1. Check free space on the battlefield through hosting, if there is not enough space – temporarily increase the disk quota
  2. Create a full backup of Bitrix on the production site
  3. Download the restore.php file from there
  4. We place it in the root of the site folder
  5. Run by IP http://yourip/restore.php
  6. Act on system requests.
  7. Waiting for deployment.

Preparing the migrated site

  1. Go to Bitrix admin panel by IP in VDS
  2. Check http://yourip/bitrix/admin/site_checker.php?lang=ru
  3. If everything is OK, proceed.

Import/Export Database via SSH

Works faster and more reliably than through phpmyadmin and with databases of any size.

On large databases, in order not to crash the server, we use the configuration
mysqldump -u USER -p –single-transaction –quick –lock-tables=false DATABASE | gzip > OUTPUT.gz

  1. Go to the client’s SSH server
  2. Test Mysql connection mysql -u [DB_username] -p (will ask for password)
  3. See if the user is the right one (list of databases) show databases;
  4. Checking the availability of free space on the client’s hosting (if possible)
  5. Go to the directory where we want to get the dump
  6. Dumping mysqldump -u [Username] -p [DBname] > [filename].sql (it will ask for a password and silently start working. That is, you have to wait until the BASH prompt appears to enter – it means the file is ready)
  7. Copy the created file to the development server in the folder /var/www/html/storage/db
  8. Go to phpmyadmin on the development server
  9. Rename the target database if it exists, adding the index _1, _2 or the next one after its name CAREFULLY! through the section Operations
  10. Create a database user (as in hosting)
  11. When creating a user, check the box “Create database with same name and grant all privileges.”
  12. Create a new database with the desired name (home section) – the encoding of the new database must be the same as that of the copied one!!
  13. Go to the created database in the Privileges section and check that the user with the name of this database has full access to it
  14. SSH into the development server
  15. Go to the folder /var/www/html/storage/db
  16. Run the command mysql -u [DBUsername] -p [DBName] < [filename].sql if everything is OK, you will have to wait similarly to step 7
  17. Checking the database with phpmyadmin
  18. Checking site performance
  19. Remove the database you made in step 9.

Source: http://qaru.site/questions/114074/how-can-i-slow-down-a-mysql-dump-as-to-not-affect-current-load-on-the-server

What is mining and where did all the video cards go?

In simple words: what is mining and where did all the video cards go

You probably heard from the news that all video cards have disappeared from sale. You even found out from there who bought everything – the miners. They “mine” cryptocurrency on their “farms”. I am sure that you have heard about the most famous cryptocurrency – Bitcoin.

But I also believe that you don’t really understand why it started right now, what exactly this mining is about, and why there is so much noise around some strange “electronic candy wrappers” in general. Maybe if everyone is engaged in mining, then you should too? Let’s get to the bottom of what’s going on.

Blockchain

Let’s start with a bit of bitcoin and blockchain basics. You can read more about this in our other article, and here I will write very briefly.

Bitcoin is decentralized virtual money. That is, there is no central authority, no one trusts anyone, but nevertheless, payments can be safely organized. Blockchain helps with this.

Blockchain technology, in my opinion, is the new internet. It’s an idea on the same level as the internet.

Herman Gref

Blockchain is such an Internet diary. Blockchain is a sequential chain of blocks, each of which contains transactions: who transferred how many bitcoins and to whom. In English, it is also called ledger – literally “ledger”. Actually, the ledger is – but with a couple of important features.

The first key feature of the blockchain is that all full-fledged participants in the Bitcoin network store the entire block chain with all transactions for all time. And they constantly add new blocks to the end. I repeat, the entire blockchain is stored by each user in its entirety – and it is exactly the same as that of all other participants.

The second key point: the blockchain is based on cryptography (hence the “crypto” in the word cryptocurrency). The correct operation of the system is guaranteed by mathematics, and not by the reputation of any person or organization.

Those who create new blocks are called miners. As a reward for each new block, its creator now receives 12.5 bitcoins. At the exchange rate as of July 1, 2017, this is approximately $30,000. A little later, we will talk about this in more detail.

By the way, block rewards are the only way to issue bitcoin. That is, all new bitcoins are created with the help of mining.

A new block is created only once every 10 minutes. There are two reasons for this.

Firstly, this was done for stable synchronization – in order to have time to distribute the block throughout the Internet in 10 minutes. If blocks were created continuously by everyone, then the Internet would be filled with different versions, and it would be difficult to understand which of these versions everyone should eventually add to the end of the blockchain.

Secondly, these 10 minutes are spent on making the new block “beautiful” from a mathematical point of view. Only the correct and only beautiful block is added to the end of the blockchain diary.

Why blocks should be “beautiful”

The correct block means that everything is correct in it, everything is according to the rules. The basic rule: the one who transfers the money really has that much money.

And a beautiful block is one whose convolution has many zeros at the beginning. You can again remember more about what a convolution (or “hash” is the result of some mathematical transformation of a block) is from here. But for us now it is completely unprincipled. The important thing is that to get a beautiful block, you need to “shake” it. “Shake” means to slightly change the block – and then check if it suddenly became beautiful.

Each miner continuously “shakes” candidate blocks and hopes that he will be the first one to “shake” a beautiful block, which will be included at the end of the blockchain, which means that this particular miner will receive a reward of $30,000.

At the same time, if suddenly there are ten times more miners, then the blockchain will automatically require that in order to recognize a new block as worthy of being written to the blockchain, it must now be ten times “beautiful”. Thus, the rate of appearance of new blocks will be preserved – one block will appear every 10 minutes anyway. But the probability of a particular miner to receive a reward will decrease by 10 times.

Now we are ready to answer the question why blocks should be beautiful. This is done so that some conditional Vasya cannot take and simply rewrite the entire history of transactions.

Vasya will not be able to say: “No, I did not send Misha 10 bitcoins, in my version of the story there is no such thing – believe me.” Indeed, in this fake version of the story, the blocks must be beautiful, and as we know, in order to shake at least one such block, it is necessary that all the miners work for 10 minutes, which Vasya alone can handle.

Miners

The concept is clear, now let’s take a closer look at the miners.

In 2009, when only enthusiasts (or rather, even only its creators) knew about Bitcoin and it cost five cents apiece, it was easy to mine. There were few miners, say, a hundred. This means that, on average, per day, the conditional miner Innokenty at least once had the luck to shake a block and receive a reward.

By 2013, when the price of Bitcoin rose to hundreds of dollars apiece, there were already so many enthusiastic miners that it would take months to wait for luck. Miners began to unite in “pools”. These are cartels that shake the same block candidate all together, and then share the reward for everyone fairly (in proportion to the effort expended).

Then there were special devices – ASIC. These are microcircuits that are designed specifically to perform a specific task. In this case, ASICs are narrowly focused on shaking Bitcoin blocks as efficiently as possible.

The mining power of ASICs is incomparably greater than the power of a conventional computer that can perform any calculations. In China, Iceland, Singapore and other countries, they began to build huge “farms” from ASIC systems. It is advantageous to locate the farm in a mine underground, because it is cold there. It is even more profitable to build a hydroelectric power station nearby so that electricity is cheaper.

The result of this arms race was that it was completely unjustified to mine bitcoins at home.

Altcoin mining or why video cards disappeared right now

Bitcoin is the first and most popular cryptocurrency. But with the advent of the popularity of cryptocurrencies as a phenomenon, competitors began to appear like mushrooms. Now there are about a hundred alternative cryptocurrencies – the so-called altcoins.

Each altcoin creator does not want to mine his coins at once very difficult and expensive, so he comes up with new criteria for the beauty of blocks. It is desirable that the creation of specialized devices (ASIC) is difficult or delayed as much as possible.

Everything is done so that any fan of this altcoin can take his usual computer, make a tangible contribution to the total power of the network and receive a reward. For “shaking” in this case, a regular video card is used – it just so happened that video cards are well suited for such calculations. Thus, with the help of the availability of the mining process, it is possible to increase the popularity of this altcoin.

Pay attention to the second line in the table above – Ethereum. This is a relatively new cryptocurrency (appeared in 2015), but with special features. In short, the main innovation of Ethereum is the ability to include in the blockchain not only static information about payments made, but also interactive objects – smart contracts – that work according to programmed rules.

Why this created such a stir, we will discuss in a separate article. For now, it will suffice to say that the new properties of Ethereum have ensured great interest from “crypto-investors” and, as a result, the rapid growth of its exchange price. If at the beginning of 2017 one “ether” cost $8, then by June 1, the rate broke through the $200 mark.

It has become especially profitable to mine Ethereum, which is why miners bought up video cards.

Видеокарта Gigabyte специально для майнинга — сразу без всяких ненужных вещей вроде выхода на монитор. Источник

What happens if miners stop mining

Suppose that mining has become unprofitable (the profit does not pay off the costs of equipment and electricity), and the miners stop mining or start mining some other currency. What then? Is it true that if miners stop mining, then Bitcoin will stop working or will work too slowly?

No. As we found out above, the blockchain constantly adapts the criteria for the “beauty” of the created blocks so that, on average, the speed of their creation is constant. If there are 10 times fewer miners, the new block will have to “shake” 10 times less, but the blockchain itself will fully perform its functions.

So far, the growth of the exchange rate more than compensates for the drop in rewards, but someday the main profit will come from transfer fees, which the miner also takes. They will not remain without work and without reward.

Conclusion

We figured out what mining really is, why it is needed, who and when it is profitable to mine, where all the video cards have disappeared from the stores, and why some manufacturers now release video cards immediately without going to the monitor.

The material was taken from: https://blog.kaspersky.ru/

How to choose an antivirus for your home computer

Which antivirus is better?

Absolutely all users, from computer gurus to beginners, know about such a terrible concept as “computer viruses”. Beginners are afraid of computer viruses, because for them they are fraught with a lot of myths and unknown, and advanced users know the extent of the consequences of such an unpleasant event as a PC infection with viruses, and are afraid of its onset. In any case, both beginners and advanced users want to reliably secure their data and their computer – this is what an antivirus is for. Antivirus will protect your files on your computer: documents, photos, music, videos and other data, including passwords and other personal data. In this article, our experts will try to help you choose the best antivirus for 2013 for your home computer.

 

 

 

 

Danger and types of viruses

To choose the best antivirus for yourself, you must understand that by the term “virus” we mean a complex of malicious files, programs and scripts that, one way or another, harm the computer. There are several types of computer viruses:

  • Worms

This type of virus does not pose any danger to the data, but at the same time “clogs” the computer by copying itself. As a result of this, the computer starts to work very slowly, in other words, it starts to “slow down”. It is worth noting that even a sufficiently powerful computer can work very slowly: windows open for a long time, programs start after a long pause, video slows down during playback, etc.

  • Trojans

Trojans are one of the most dangerous types of computer viruses. The danger of Trojans lies in the fact that they can steal data (most often passwords), change files, and delete them, disguising themselves as harmless and simple files.

  • Manipulators

Manipulator viruses, as a rule, do not harm the user’s data, their main goal is to turn the computer into a zombie so that it performs the desired action at a certain time. In the vast majority of cases, this type of virus is distributed by hackers in order to attack websites using zombie computers.

  • Blockers

Blockers are a type of virus that blocks the entrance to the operating system, requiring the user to transfer, under various pretexts, a certain amount of money to unlock.

 

 

 

Antivirus efficiency

It should be said right away that there is no perfect antivirus. Yes, antiviruses protect your computer, but no antivirus will protect your computer 100%. Why? The fact is that the essence of the work of the antivirus lies in its algorithms, thanks to which the presence of viruses in the computer is recognized. Viruses are detected by their activity or by certain actions. When the antivirus knows the virus and its features, then, when it enters the computer, the antivirus notices it and informs the user about the danger. This is what concerns well-known antiviruses, but there are also new viruses that are not yet known to antivirus developers and are not included in antivirus databases. This situation is well thought out. To do this, antivirus algorithms monitor the activity of files and applications and, if they are suspicious, inform the user by offering a specific list of actions. All this is good, but there are viruses that the antivirus may not notice, these are, as a rule, new viruses or updated old ones. There are other reasons for skipping viruses by antivirus, but we will probably not touch on them.

Protecting your computer on the Internet

Modern anti-virus programs include not only the ability to detect and remove viruses, but also the ability to protect your computer from various undesirable consequences: hacker attacks, intrusive advertising on sites, spam, etc. Thus, the antivirus includes a firewall, which, probably, most of you have heard of. If earlier antivirus and firewall were different programs, now, as a rule, the best and most advanced versions of antiviruses include comprehensive protection, that is, antivirus + firewall.

 

 

 

What are the criteria for choosing the best antivirus

The best antivirus for your own computer should initially include basic functions and have features that we will list below:

  • Antivirus scanner

The scanner function scans the hard disk and RAM for viruses. It is very good if the scanner periodically automatically checks for changed and added files, for the so-called passive security.

  • Antivirus monitor

This function of the antivirus continuously monitors the activities of your computer, that is, it monitors all events that occur on the computer, preventing viruses from leaking into the computer.

  • Application Control

Quite often, viruses penetrate programs or are pseudo-programs, which is why the program control function was created. If there are any suspicious actions of applications, this control immediately informs the user about it and determines the type of threat.

  • Network Control and Web Antivirus

Another necessary function of the antivirus, in our opinion, is to control the local network and Internet traffic. Thus, you will be protected from computer attacks from the local network and the Internet, as well as from the negative consequences of malicious codes and infected sites.

  • Flexible settings

The more settings an antivirus has, the better. Thanks to this, you can choose the level of control of a particular antivirus function: low, medium or high, or completely disable unnecessary functions in order to remove unnecessary load on your computer’s resources. In addition, you can create your own rules for searching and detecting viruses, as well as actions taken by the antivirus when detecting virus activity on your computer.

  • Updating anti-virus databases

Anti-virus databases are the so-called file cabinet of viruses and a repository of algorithms for their detection and neutralization. For reliable computer protection, anti-virus databases must be constantly updated and up-to-date, due to which, when a new virus appears on the network, developers will create a neutralization algorithm and add it to the anti-virus database. By frequently updating your anti-virus databases, your anti-virus will have the latest algorithms for neutralizing new or updated viruses.

  • Antivirus Self-Defense

An antivirus should ensure not only the security of the computer, but also its own security. That is, the antivirus must have self-defense, thanks to which viruses will not be able to turn it off, neutralize or block the launch. This is another reason why the antivirus may not detect or remove the virus.

  • Resource Efficiency in Passive Mode

Well, the last important factor when choosing an antivirus is to analyze the consumption of computer resources by it. Despite the fact that modern antiviruses use computer resources sparingly when working in passive mode, nevertheless, some unsuccessful versions of antiviruses can have this problem, so you need to pay attention to it. It should be noted that it is necessary to distinguish between the passive mode of operation of the antivirus and the active one. Passive mode is when the antivirus is minimized to tray and monitors the operation of the computer, and active mode is when you independently launched a computer scan for viruses or perform another active action.

These are the so-called basic functions that must be in your antivirus. The only exception is network control, which is related to the firewall.

Which antivirus is the best

All users have their own criteria and preferences in antiviruses, which is why each user will have their own best antivirus. Before touching on the list of the best antiviruses, according to MasterServis24.ru site experts, it is worth saying that the vast majority of antiviruses have 2 types of antivirus programs for computers and laptops: simple antivirus and antivirus + firewall (with additional functions). For a home computer, a regular antivirus is enough, but if we talk in the vein of our topic, then the distribution kit that includes an antivirus + firewall can be called the best. If your computer does not have an Internet connection, then, in fact, you do not need a version with a built-in firewall, but if you have Internet access, we recommend installing an antivirus with a firewall.

Next, we want to bring to your attention a list of the best popular antiviruses, based on our personal experience.

 

 

 

 

1. Kaspersky (Kaspersky Anti-Virus)

 

In our opinion, Kaspersky Anti-Virus is currently the best anti-virus solution. There are many versions of Kaspersky Anti-Virus, but we will highlight two of the most popular ones: Kaspersky Anti-Virus and Kaspersky Internet Security. The difference between these two versions of the antivirus is that the first version is a simple antivirus, the second is an antivirus + firewall. Despite the shortcomings, the advantages of this antivirus are much greater and they are more significant. Now let’s analyze all the pros and cons of Kaspersky Internet Security.

Benefits:

  • High degree of protection against viruses;
  • Beautiful and user-friendly interface;
  • High functionality and customization;
  • Global popularity;
  • Presence of traffic control, site check and anti-banner.

Weaknesses:

  • Sufficiently high price;
  • An extra “independence” of the antivirus in some situations;
  • Active scan consumes a lot of computer resources.

Antivirus prices:

A 1-year license for Kaspersky Anti-Virus is 1200 rubles.

A 1-year license for Kaspersky Internet Security will cost you 1,600 rubles.
 

 

 

 

2. Dr.Web

 

In our opinion, Dr.Web antivirus rightfully occupies the second place among the list of the best antiviruses. In principle, Dr.Web and Kaspersky go hand in hand, but, nevertheless, Dr.Web is somewhat inferior to its main competitor. Dr.Web antivirus has two versions Dr.Web Antivirus and Dr.Web Security Space, simple antivirus and antivirus + firewall, respectively. Let’s analyze them.

Benefits:

  • Good virus protection;
  • Internet control, website checker and anti-banner;
  • Simple interface.

Weaknesses:

  • Despite the good work of the antivirus, it sometimes misses viruses when scanning a PC;
  • In the latest versions of the antivirus, flaws were noticed that led to some problems in working with the program;
  • Compared to Kaspersky, it has a low price for a license, but it is not too affordable;
  • The lack of customization options as in the previous product.

Antivirus prices:

A 1-year license for Dr.Web Anti-Virus will cost 990 rubles.

A 1-year license for Dr.Web Security Space costs 1290 rubles.
 

 

 

 

3. NOD32

 

NOD32 is also a popular antivirus among home users. This antivirus protects your computer well from viruses and includes a number of useful additional features. Like other antiviruses, NOD32 has two versions: ESET NOD32 Antivirus and ESET Smart Security (with a firewall). After analyzing the antivirus, the following can be distinguished.

Benefits:

  • Good virus protection;
  • Ad blocking;
  • Social Security networks;
  • Ease of use.

Weaknesses:

  • Problems with complete removal of the antivirus from the computer;
  • Sometimes, quite simple Trojans have been seen to be missed by antivirus software;
  • High license cost (and unjustified);
  • Problems with the speed of checking the computer for viruses.

Antivirus prices:

A 1-year license for ESET NOD32 Antivirus will cost 1080 rubles.

A 1-year license for ESET NOD32 Smart Security costs 1690 rubles.

 

 

 

 

4. Аvast!

 

Well, at the end of the review of the best antivirus products, we should mention Avast! antivirus. As for its paid version – Avast! Internet Security, in our opinion, it occupies the last step in the ranking of the best antiviruses, which cannot be said about its free version – Avast! Free Antivirus, which is the best free antivirus available today. Avast! Free Antivirus is a full-fledged simple antivirus, and not a utility for checking your computer for viruses, which we will consider below.

Benefits:

  • Free, and a full-fledged antivirus, not a utility;
  • Good as for a free antivirus, virus detection;
  • Block sites that can harm your computer;
  • Nice interface.

Weaknesses:

  • Low functionality;
  • Compared to paid counterparts, it sometimes skips viruses;
  • Does not block ads or banners on websites.

Antivirus prices:

Avast! Free Antivirus is free.

1 year license for Avast! Internet Security is 1450 rubles.

Well, after all of the above and after describing the best antiviruses to date, it is worth summing up a little. Like it or not, only a paid antivirus can reliably protect your computer from various types of threats, and besides, it will include a lot of additional services, which is very convenient. Summing up, let’s say that, in our opinion, the best paid antivirus is Kaspersky Internet Security, and perhaps the only high-quality free antivirus is Avast! Free Antivirus. Well, the final choice is yours.

The material was taken from the site: http://masterservis24.ru

Website promotion principles

General information:

There is a crisis in the yard, which means that business, as well as in non-crisis times, is looking for ways to generate a flow of incoming customers cheaply. Creating a company website and promoting it on the Internet is a way to get new customers cheaply. Ideally, your site should present your product and prepare the client for purchase.

Now in the market of IT-services there are a lot of proposals for promoting websites on the Internet. Everyone is talking about keywords, headline optimization, rankings, charts sent, monthly maintenance…

So what is website promotion on the Internet and how does it differ from the work of increasing calls and letters from real customers?

Speaking about website promotion, we are talking primarily about Internet search engines. These include companies such as Yandex, Google, Mail, and others. Search engine – in response to the user’s request, issues a number of links to sites, ranking them according to “relevance”, that is, according to compliance with a particular consumer request.

Higher places in the search engine results, if you simplify everything, are occupied by sites in which the search word contains the maximum number of times. But in order for the site to meet the user’s requirements in the first place, search engines develop complex algorithms for evaluating sites for compliance with the search words – “key”, trying to predict the desires and interests of the client. These algorithms are kept secret, and the task of a specialist promoting your site in the search results is to try to predict the actions of the search engine algorithm and put the right words in the right places on your site so that it ranks higher in the search results.

Search engines with the help of robots constantly explore sites on the Internet, indexing them and placing ratings. Therefore, the promotion of the site in the issue takes months and years, and this allows you to take a monthly fee from you, giving you incomprehensible numbers in the charts.

But the results of the issuance of a modern search engine are the result of the work of a complex algorithm that remembers and knows your interests. For example, you probably noticed that when you look for a washing machine or a fishing rod on the Internet, how immediately within 2-3 weeks, information about washing and fishing somehow flashes on your monitor? This is also the result of the work of complex search engine algorithms.

Search results may be different on different computers. It all depends on the search history of a particular client.

We believe that the classic “Promotion” of the site and the battle for the first place in the search results, for example, by the word “Buy a puncher” is not an effective and outdated method.

We believe that in today’s environment, sales teams need to know and use free tools that are available to anyone and do not require special technical knowledge and skills.

Principles of customer acquisition.

Correct site content

  1. Be concise. The average visit time to a site is between 20 seconds and 3 minutes. Usually, it is easier for the user to close the window and go to your competitor’s site than to delve into the text and signs. – information on the site should be short, easy to read.
  2. Contacts – always in sight – the desired way of contacting you should always be in front of the client’s eyes.
  3. Product – face – attention on the main page of the site should be paid to YOUR PRODUCT!!!, and not to what a great company you are.

Using free marketing tools

  1. Study the client – Yandex counter codes must be configured and working on the site, with the configured Web Visor – this is a Yandex product that allows you to view the actions of your visitors. You just see how they move the mouse – which means what they are looking at. What are they interested in and so on.
  2. Know the client – the same Yandex counters give you information about the gender, age, equipment of the client. Google counters – give information about the client’s INTERESTS. Geographic location and status.
  3. Develop – work on optimizing the blocks on the site, improving the appearance of the product, in accordance with the actions of users on the site, should be carried out constantly.
  4. Study the market – Yandex projects word selection and Google trends – will help you study the history and popularity of certain queries on the topic of your product.
  5. Be healthy – among other things, it is necessary to check the site for viruses and spam applications weekly, check site backups. So, for example, if your site was hacked by a virus and placed malicious code on it, you can find out about it only after a few months, and as a rule this happens by accident. And the main danger is that your address on the Internet will fall into the bases of unreliable ones. In this case, it will take months to exclude you from the list of intruders. And all this time, when your clients try to access the site, they will receive warnings from their antiviruses, which is dangerous for you.

Using Paid Marketing Tools

Both Yandex and Google have paid and very inexpensive advertising tools that allow you to show your site in the first places in the search results in certain regions for certain categories of users at certain times. It works much more efficiently than any “promotion” of your site.

For example, according to the word “Buy a puncher” in Yandex – 5,000 requests and 10,000 sites. So your site for these words can be given out by Yandex in first place in 500 requests that are made from Ufa and only during business hours. And you pay only for clicks to your site, so you get about 50-70 clicks from guaranteed interested customers.

For more information about attracting customers to your business, please call 89899500527 or 89273211707 and talk to our specialists.

Application Victoria

Almost all computers today have a hard drive. And no matter how they tried to replace it with other more reliable and faster carriers, an equal alternative was never developed. Hard drives have a number of advantages, such as large amounts of data and low cost. Among the shortcomings are quick breakdowns, damaged sectors. Many know this firsthand. Almost everyone had unpleasant moments when the hard drive with all the information accumulated over the years began to act up.

One of the ways to save a hard drive or find out about its future failure is software repair and diagnostics using the Victoria program for Windows. Although many experts say that this program does not count anything other than the number of stars on the day of the banana harvest, it still has a lot of benefits.

Firstly, thanks to the Victoria hard drive recovery program for Windows, you can quickly detect bad sectors and mark them as non-working. After that, they will not be read at all, and, therefore, there will be no freezes and errors when reading.

Secondly, Victoria under Windows makes excellent diagnostics. The speed of diagnostics is not slower than in Victoria under DOS. After the diagnosis, you can always find out how much is left for your disk and whether you need to do treatment under paid versions of the program, or under DOS.

Thirdly, Victoria for Windows is very easy to use and does not require much knowledge. Even the most inexperienced beginner can run a series of tests that will show interesting results.

Let’s look at an example of checking and restoring a hard drive using Victoria. The application itself, as a rule, is distributed in an archive without an installer. And you do not need to install it: the program is distributed without an installer and fully works without installation. The size of the program does not exceed 600 kilobytes.

After the archive with the application is unpacked, you need to run the application itself. To do this, select the green cross icon and click on it. After that, you will be prompted with the program window. At first glance, everything seems complicated and incomprehensible, but in fact everything is very simple. Switching between tabs changes between basic information about the hard disk, or “passport”, and other program functions: information about the disk status, testing, deep work with sectors, settings. Let’s look at these tabs one by one below.

Standard.

In this tab, you can get basic information about the hard drive: model, firmware, serial number, and other additional data. In order for the program to read data about the disk, click “Passport”.

SMART.

Here you will find the basic information that the hard drive reports. This is a series of test results for reading and writing, health and responsiveness of the hard drive. The information is presented by a number of tests, the transcript of which you will find on the Internet. To get the results, click “Get SMART”.

TEST.

In the TEST tab, what we need is testing for errors and fixing them. This tab needs to be analyzed in more detail. On the left, in the working area of the program, we see a number of different cubes (rectangles). These are sectors. During testing, each cluster will be marked with a color that characterizes its state.

Gray sectors are good sectors.

Green – those that respond more slowly, their reading requires more time. However, they are also in good condition.

Orange. Orange sectors indicate a very long reading. As a rule, it is they who create the braking of the hard drive. When testing, there should be no more than 50 (approximately). They are working, but will soon fail. They cannot be restored.

Red sectors are damaged or cannot be read. Can’t be restored. The presence of such sectors indicates that you need to think about changing the disk.

Blue with a cross. Blue sectors with a cross are those that caused a failure when reading. Information from them cannot be recovered. It is necessary to re-partition such sectors so that the hard drive does not write to or read data from them. This is done using the “Remap” option, which you will read about below.

Also in the settings panel you can find round toggle buttons Ignore, Erase, Remap, Restore.

Ignore. This option tells the scanner that no changes need to be made. We ignore bad sectors.

Erase. The Erase option conveys that sectors need to be overwritten.

remap. This option must be enabled when you need to repartition bad sectors. Having found an error, the program marks the sector as non-working and replaces it with a healthy one.
Restore is used when a sector needs to be restored. Only available in the paid version.

After all the settings are set, you need to click “Start”. The program for checking the hard disk will scan the hard disk for a long time, which can take about a day or more if there are errors. A lot also depends on the size of the disk. A good disc is quickly checked.

In conclusion, I would like to say that checking the hard drive with the Victoria program will not save your drive, just as cosmetics do not save a person from old age. If your disk has grown old, then this is an irreversible process and cannot be returned. Sectors fail one by one, and their recovery does nothing. If there are dead sectors, it means that there will be more soon. It happens like a nuclear bomb explosion, a chain reaction. Therefore, if there are bad sectors, you need to change the disk and copy the information while it is available.

Protection against encoding apps. Part 2

1. Customize your computer settings.
Starting with Windows Wista, the OS includes a system protection service across all drives, which backs up files and folders during a backup or creation of a system restore point. After installing the OS, this service is enabled only for the system partition, usually drive C. For additional protection, it is recommended to enable this service for all drives.

2. What to do if the files are encrypted.
If an antivirus program is installed on the computer, then in the settings you need to do the following:
– disable automatic removal of detected malware.
– set to place suspicious files in quarantine.
– If you find a suspicious file, the launch of which has led to computer infection and file encryption, you can send it for analysis, for example, to Kaspersky Lab by e-mail [email protected]. Pack the files for analysis into an archive with the infected password (using the WinRar archiver). When setting a password, select the Encrypt file names check box.
– It is necessary to create a copy of all encrypted files.
– You can try to recover files using File History for Windows Vista, Windows 7, Windows 8, Windows 10.
– You can also try using Kaspersky Lab utilities for decryption: RectorDecryptor utility; XoristDecryptor utility; RakhniDecryptor utility.

Before running the utility, be sure to make copies of all files.
– List of places where files of the ransomware can be located:
APPDATA
OS Windows NT/2000/XP:

Drive:Documents and Settings%UserName%Application Data
%USERPROFILE%Local SettingsApplication Data

OS Windows Vista/7/8:

Drive:Users%UserName%AppDataRoaming
%USERPROFILE%AppDataLocal

TEMP (temporary directory)
%TEMP%???????.tmp (example: tempvum35a5.tmp)
%TEMP%???????.tmp?? (example: temp7ze5418.tmpmp)
%TEMP%??????? (example: temppcrdd27)
%WINDIR%Temp

Internet Explorer temporary directory
OS Windows NT/2000/XP: %USERPROFILE%Local SettingsTemporary Internet Files

OS Windows Vista/7/8:

%LOCALAPPDATA%MicrosoftWindowsTemporary Internet Files
..temporary internet filescontent.ie5
..temporary internet filescontent.ie5???????? (? — a-z, 0-9)

Desktop
%UserProfile%Desktop

Recycle Bin
Drive:Recycler
Drive:$Recycle.Bin
Drive:$Recycle.Bins-1-5-21-??????????-??????????-??????????-1000 (? — 0-9)

System directory
%WinDir%
%SystemRoot%system32

User document directory
%USERPROFILE%Мои документы
%USERPROFILE%Мои документыDownloads

Directory for downloading files in a web browser
%USERPROFILE%Downloads

Startup directory
%USERPROFILE%Главное менюПрограммыАвтозагрузка