intro (Chapter Introduction) alias colcrt help removerez true aroff compile inst rlogin udl awk ctags kill rm uname basename cut last rmdir uniq binprint describe launch rsh wall calendar df link sed wc cat dsort logger setvers whatis catrez exit login sleep whereis cd false lseg split who center fmt man strings whois chtyp ftp more tail write cksum getvers nroff tee yes clear gsh pwd test cmp head rcp tr