UNIX

ls -R
grep include ./*
for f in *.*; do mv “$f” Unix_”$f”; done
for f in *.txt; do d="$(head -1 "$f") ;x=”$(cut -d " " -f1 $f)”  ; mv $f $x; done
wc –l *.txt
for i in ./*foo*;do mv -- "$i" "${i//foo/bar}";done
history | sort | cut –d-10 -n