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Installing/Removing/Updating Packages in an Exercise Environment

This article covers exercise virtual machines which use a distribution that leverages the apt package manager (such as Debian, Ubuntu, Kali). In addition, different distribution package managers, while still using apt as their package manager, may have different package libraries or names which may not be the same.

The Cyber Range allows instructors to customize their student's exercise environments to their specific needs. One of the ways this can be accomplished is installing and removing packages in the exercise environment.

Installing Packages

sudo apt install package_name
  • This command allows a user to install a package to the environment, as shown below. You will be asked for confirmation to install the package. In this example we use the bsdmainutils package, but the package can be any one you choose.

Installing a package will prompt the terminal to display the amount of disk space used, as well as confirmation by typing Y or N.

Removing Packages

sudo apt remove package_name 
  • This command allows a user to remove a package from the environment, as shown below. You will be asked for confirmation to remove the package.

Removing a package will prompt the terminal to display the amount of disk space freed, as well as confirmation by typing Y or N.

Updating Package Information

Warning

The exercise environments have specific versions of software included, and updating packages may affect functionality. We do not recommend updating packages in the environments, so please use at your own risk.

sudo apt update
  • This command allows a user to check for available updates for your packages. It will also prompt you with the option to see the list of upgradable packages.

Updating a package will display the amount of upgradable packages. Running apt list --upgradable will present you with a list of upgradable packages

sudo apt upgrade
  • This command allows a user to upgrade a package based on the packages found from the sudo apt update. Running this command may impact functionality.

Additional Information

We recommend using the apt command, rather than the apt-get command, as it is more user-friendly. The apt command is what is recommended by Linux distributions. More information on the differences between apt and apt-get can be found here.