Basic introduction to apt-get Ubuntu | Debian

Introduction 

The apt-get utility is a powerful command-line tool for managing packages in Debian and other Debian-based Linux distributions such as Ubuntu. In this guide, we will talk about basic apt-get commands and it's usage. 

Installing new packages. 

If you are installing a package with apt-get you need to use the following syntax. 

# sudo apt-get install <package> [package2 package3]

Installing packages will also install all required dependencies for the program.

Updating package database.

You can update apt package database by using the following command. 

# sudo apt-get update

Update command will resynchronize the local database with the latest version. An update should always be performed before an install, upgrade or dist-upgrade.

Upgrading installed packages. 

Before we upgrade packages, make sure to update the local database with apt-get. After the database is updated, Use the following command to upgrade installed packages. 

# sudo apt-get upgrade

This will upgrade all installed packages on the server. 

Removing package. 

To remove a package, you can use the following command:

# sudo apt-get remove <package>

This will remove the package from your system, however, it does not remove any of the package configuration files. You can clear package configuration by using the following command:

# sudo apt-get purge 

Great! Now you know the basics of the apt-get tool! :)