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What is the difference between remove,purge and autoremove in UBUNTU LINUX?



sudo apt-get remove <package>:

                                     It will remove only the packages but not the configuration files.

sudo apt-get purge <package>:
  
                                     It will remove both the package and configuration files.

 sudo apt-get autoremove:
       
                                     It can be used without specifying a package.It removes the configurations,packages that are no longer needed.

Example:
                
                When You install package A,then package B and C gets installed as dependencies for package A.But when we uninstall package A,then B and C lefts installed.so here in this case,sudo apt-get autoremove searches the system for packages that are installed as dependecies and no longer be used like B and C,removes them.

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