# cd /bin
# ls -a
.		date		kenv		pkill		setfacl
..		dd		kill		ps		sh
[		df		link		pwd		sleep
cat		domainname	ln		rcp		stty
chflags		echo		ls		realpath	sync
chio		ed		mkdir		red		tcsh
chmod		expr		mv		rm		test
cp		getfacl		pax		rmail		unlink
csh		hostname	pgrep		rmdir

# cd /usr/bin
# ls -a
.			grops			printf
..			grotty			protoize
CC			groups			psroff
Mail			gunzip			quota
addftinfo		gzcat			ranlib
addr2line		gzexe			rcs
afmtodit		gzip			rcsclean
alias			hd			rcsdiff
apply			head			rcsfreeze
apropos			hesinfo			rcsmerge
ar			hexdump			read
as			host			readelf
asa			hpftodit		readlink
at			id			ree
atq			ident			refer
atrm			indent			renice
awk			indxbib			reset
b64decode		info			rev
b64encode		infokey			rfcomm_sppd
banner			install			rlog
basename		install-info		rlogin
batch			ipcrm			rpcgen
bc			ipcs			rpcinfo
bdes			jobs			rs
bg			join			rsh
biff			jot			rup
brandelf		kadmin			ruptime
bsdiff			kdestroy		rusers
bsdtar			kdump			rwall
bspatch			keylogin		rwho
bthost			keylogout		scp
btsockstat		kgdb			script
bunzip2			killall			sdiff
byacc			kinit			sed
bzcat			klist			send-pr
bzegrep			kpasswd			sendbug
bzfgrep			krb5-config		sftp
bzgrep			ksu			shar
bzip2			ktrace			showmount
bzip2recover		ktrdump			size
bzless			lam			slogin
c++			last			smbutil
c++filt			lastcomm		sockstat
c89			ld			soelim
c99			ldd			sort
cal			leave			split
calendar		less			sscop
cap_mkdb		lessecho		ssh
catman			lesskey			ssh-add
cc			lesspipe.sh		ssh-agent
cd			lex			ssh-keygen
chat			lex++			ssh-keyscan
checknr			limits			stat
chfn			lint			strings
chgrp			lkbib			strip
chkey			locale			su
chpass			locate			sum
chsh			lock			systat
ci			lockf			tabs
cksum			logger			tail
clear			login			talk
cmp			logins			tar
co			logname			tbl
col			look			tcopy
colcrt			lookbib			tee
colldef			lorder			telnet
colrm			lp			texindex
column			lpq			tfmtodit
comm			lpr			tftp
command			lprm			time
compile_et		lsvfs			tip
compress		m4			top
cpio			mail			touch
cpp			mailq			tput
crontab			mailx			tr
crunchgen		make			troff
crunchide		makeinfo		true
crypt			makewhatis		truncate
csplit			man			truss
csup			manpath			tset
ctags			merge			tsort
cu			mesg			tty
cut			minigzip		ul
cvs			mkdep			umask
cvsbug			mkfifo			unalias
dc			mklocale		uname
dialog			mkstr			uncompress
diff			mktemp			unexpand
diff3			mkuzip			unifdef
dig			mmroff			unifdefall
dirname			more			uniq
du			msgs			units
edit			mt			unvis
ee			nawk			uptime
egrep			nc			usbhidaction
elf2aout		ncal			usbhidctl
elfdump			ncplist			users
enigma			ncplogin		uudecode
env			ncplogout		uuencode
eqn			neqn			uuidgen
ex			netstat			vacation
expand			newaliases		verify_krb5_conf
f77			newgrp			vgrind
false			newkey			vi
fc			nex			view
fetch			nfsstat			vis
fg			nice			vmstat
fgrep			nl			w
file			nm			wait
file2c			nohup			wall
find			nroff			wc
finger			nslookup		what
flex			nsupdate		whatis
flex++			ntpq			whereis
fmt			nvi			which
fold			nview			who
from			objcopy			whoami
fstat			objdump			whois
fsync			objformat		window
ftp			od			write
g++			openssl			xargs
gate-ftp		opieinfo		xstr
gcc			opiekey			yacc
gcore			opiepasswd		yes
gcov			otp-md4			ypcat
gdb			otp-md5			ypchfn
gdbserver		otp-sha			ypchpass
gdbtui			pagesize		ypchsh
gencat			passwd			ypmatch
getconf			paste			yppasswd
getent			patch			ypwhich
getopt			pathchk			yyfix
getopts			pawd			zcat
gperf			pfbtops			zcmp
gprof			pftp			zdiff
grep			pgrep			zegrep
grn			pic			zfgrep
grodvi			pkill			zforce
groff			post-grohtml		zgrep
grog			pr			zless
grolbp			pre-grohtml		zmore
grolj4			printenv		znew