How to add an alias to a command in terminal?
alias new_name='old command'
To create a permanent alias you have to edit the .bashrc
file in your home directory.
More info here
More .bashrc files here
On the bash command line it is simply a case of typing:
alias my_command="Command to run"
For example to create a short command run a long listing you could do:
alias ll="ls -l"
The quotes are not required if you are not adding switches to the aliased command.
To make permanent changes you can put your aliases separetely in ~/.bash_aliases