io in ~/.bashrc ho, ad esempio i seguenti alias per il comando ls e altri più comuni:

# some more ls aliases
alias ll='ls -l'
alias la='ls -A'
alias l='ls -CF'

alias lla='ls -la' # list all and long format
alias lsd='ls -d */' # list only the directory
alias cd..='cd ..'
alias md='mkdir'
alias rd='rmdir'
alias cp='cp -i'
alias mv='mv -i'
alias rm='rm -i'

alias du='du -h' # Size of a directory (by default Human Readable)
alias df='df -h -x supermount' # Size of a disk and don't probe supermount

Ciao