apt 1.0.1ubuntu2 for i386 compiled on Aug  1 2015 19:21:31
Usage: apt [options] command

CLI for apt.
Basic commands: 
 list - list packages based on package names
 search - search in package descriptions
 show - show package details

 update - update list of available packages

 install - install packages
 remove  - remove packages

 upgrade - upgrade the system by installing/upgrading packages
 full-upgrade - upgrade the system by removing/installing/upgrading packages

 edit-sources - edit the source information file