Linux users: You can assign shortcuts for your most frequently used terminal commands. By appending the following line — as many times as you would like — to your bash configuration file (~/.bashrc) you can assign aliases to shorten the amount of keystrokes necessary to throw commands:
alias yourCommand="YourTerminalCommand
For example, Ubuntu users can create an alias for the command sudo apt-get install since it is used all the time. To do this, append the following line to ~/.bashrc:
alias ins="sudo apt-get install
Then whenever you want to install an application, just type ins appname instead of sudo apt-get install appname.