ps
kill

find . -type f -name *rc
ls -lap | grep "^-" . | wc -l
tar -ztpvf this.tar.gz

rm -f `find . -name "*.html"`
rm -f $(find . -name "*.html")
find . -name "*.html" -exec rm -f {} \;
find . -name "*.html" | xargs rm -f


PS1='$PWD: '
touch
du
df
free


lsmod
modprobe


alias apropos='man -k \!'
alias apropos _man -k \!* | uniq | grep 1_
whatis whatis


1. script 2. Ctrl-D 3. nano