How to install packages via apt on stock Astra Linux?

To install packages via apt on standard Astra Linux, the same commands as in other Debian-based distributions are used. The main feature is the need to use Astra Linux repositories and possible specific dependencies.

1. Update the list of available packages:

   sudo apt update  
   // Updates package indices from configured repositories.  
   

2. Find a package (optional):

   apt search <package_name>  
   // Searches for packages containing the specified word in the name or description.  
   

3. Install a package:

   sudo apt install <package_name>  
   // Downloads and installs the specified package and its dependencies.  
   

4. Install multiple packages:

   sudo apt install <package_name1> <package_name2> ...  
   // Installs multiple packages with one command.  
   

5. Install a package without confirmation (for automation):

   sudo apt install -y <package_name>  
   // Installs the package, automatically agreeing to all prompts.  
   

6. Remove a package:

   sudo apt remove <package_name>  
   // Removes the package, leaving configuration files.  
   

7. Remove a package and its configuration files:

   sudo apt purge <package_name>  
   // Removes the package and all related configuration files.  
   

8. Remove unused dependencies:

   sudo apt autoremove  
   // Removes packages installed as dependencies that are no longer used.  
   

Before installation, ensure that the repositories for Astra Linux are correctly specified in /etc/apt/sources.list and /etc/apt/sources.list.d/ for your version and edition. In some cases, configuring access to repositories with additional security levels (e.g., repository subscription) may be required.