stty sane

alias ls='ls --color=auto' && alias ll='ls -Al'

find . -name ._* -exec rm -v {} \;

wilcards : `ls *.???`

grep -RF "the string to search" .

touch -m -a -t [YYYYMMDDhhmm.ss] [file]

Better than 'which' : command -v [command name]