In Linux you can edit the bash config file to add aliases for your most used commands in order to save time typing them.
I use Ubunto as a desktop machine and Debian as a server. In these distributions the bash files you can edit to add your cmmands’ aliases are .bashrc or .bash_profile.
$ sudo nano /etc/bash.bashrc
For example, the first commands in my list of aliases are ‘ls -l’ and ‘sudo apt-get update’. So, at the end of the .bashrc file I type:
#my aliases
alias  ll=’ls -l’
alias aptu=’sudo apt-get update’
Save the file (CTRL+O in nano) and close it (CTRL+X in nano). Restart bash to apply the new aliases by typng ‘bash’ in the command prompt:
$ bash
And there you go 🙂 Type ‘ll’ to test the new alias:
$ ll
Enjoy 🙂
Update: my favorite bash aliases so far:
alias aptu=’sudo apt-get update’
alias sn=’sudo nano’
alias ar=’sudo /etc/init.d/apache2 restart’
alias snbash=’sudo nano /etc/bash.bashrc’