Adding command alias to Ubuntu

Alias command provides user to user simple shortcut keys in the console instead of lengither commands. For example, you may use '?' instead of 'ls -ltr'.

Command alias provide faster actions in console.

What you have to do is to add your alias definitions to ~/.bashrc file.

alias ?='ls -ltr'
alias .='pwd'
alias g='gvim'
alias gd='gvim -d'