User environment
================

clear env exit finger history id logname mesg passwd su sudo uptime talk tput uname w wall who whoami write

Text processing
===============

awk banner basename comm csplit cut diff dirname ed ex fmt fold head iconv join less more nl paste sed sort spell strings tail tr uniq vi wc xargs

Shell builtins
==============

alias echo expr printf sleep test true and false unset wait yes

Networking
==========

dig host ifconfig inetd netcat netstat nslookup ping rdate rlogin route ssh traceroute

Searching
=========
find grep locate whatis whereis

Documentation
=============
apropos help man

Miscellaneous
=============
bc dc cal lp od