A survey of what shell commands are available from /bin/sh on different platforms.

Official POSIX Commands

This list of POSIX commands comes from the Shell Hater's Handbook.

Built-in

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
.	built-in	built-in	built-in	built-in	built-in	built-in	built-in
:	built-in	built-in	built-in	built-in	built-in	built-in	built-in
break	built-in	built-in	built-in	built-in	built-in	built-in	built-in
continue	built-in	built-in	built-in	built-in	built-in	built-in	built-in
eval	built-in	built-in	built-in	built-in	built-in	built-in	built-in
exec	built-in	built-in	built-in	built-in	built-in	built-in	built-in
exit	built-in	built-in	built-in	built-in	built-in	built-in	built-in
export	built-in	built-in	built-in	built-in	built-in	built-in	built-in
readonly	built-in	built-in	built-in	built-in	built-in	built-in	built-in
return	built-in	built-in	built-in	built-in	built-in	built-in	built-in
set	built-in	built-in	built-in	built-in	built-in	built-in	built-in
shift	built-in	built-in	built-in	built-in	built-in	built-in	built-in
times	built-in	built-in	built-in	built-in	built-in	yes	built-in
trap	built-in	built-in	built-in	built-in	built-in	built-in	built-in
unset	built-in	built-in	built-in	built-in	built-in	built-in	built-in

Programming

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
alias	built-in	built-in	built-in	built-in	built-in	built-in	built-in
bc	no	command	no	no	command	command	command
command	built-in	built-in	built-in	built-in	built-in	yes	built-in
date	command	command	command	command	command	command	command
env	command	command	command	command	command	command	command
expr	command	command	command	command	command	command	command
false	built-in	built-in	built-in	built-in	built-in	built-in	built-in
getopts	built-in	built-in	built-in	built-in	built-in	built-in	built-in
hash	built-in	built-in	built-in	built-in	built-in	yes	built-in
fc	built-in	built-in	built-in	no	built-in	yes	no
id	command	command	command	command	command	command	command
locale	command	command	no	no	command	command	command
localedef	command	no	no	no	command	command	command
logger	command	command	no	command	command	command	command
logname	command	command	no	no	command	command	command
newgrp	command	command	no	no	command	built-in	command
pathchk	command	command	no	no	command	command	command
pwd	built-in	built-in	built-in	built-in	built-in	built-in	built-in
read	built-in	built-in	built-in	built-in	built-in	built-in	built-in
sh	command	command	command	command	command	command	command
sleep	command	command	command	command	command	command	command
test	built-in	built-in	built-in	built-in	built-in	built-in	built-in
time	built-in	command	built-in	command	built-in	built-in	command
tput	command	command	no	no	command	command	command
true	built-in	built-in	built-in	built-in	built-in	built-in	built-in
type	built-in	built-in	built-in	built-in	built-in	yes	built-in
unalias	built-in	built-in	built-in	built-in	built-in	built-in	built-in
uname	command	command	command	command	command	command	command
write	command	command	no	no	command	command	command
xargs	command	command	command	command	command	command	command

Text

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
awk	command	command	command	command	command	command	command
cat	command	command	command	command	command	command	command
cksum	command	command	no	no	command	command	command
cmp	command	command	command	command	command	command	command
comm	command	command	no	no	command	command	command
csplit	command	command	no	no	command	command	command
cut	command	command	command	command	command	command	command
echo	built-in	built-in	built-in	built-in	built-in	built-in	built-in
ed	no	command	no	no	command	command	command
ex	command	command	no	no	command	command	command
expand	command	command	no	no	command	command	command
fold	command	command	no	no	command	command	command
grep	command	command	command	command	command	command	command
head	command	command	command	command	command	command	command
join	command	command	no	no	command	command	command
more	command	command	no	no	command	command	command
nl	command	command	no	no	command	command	command
od	command	command	no	no	command	command	command
paste	command	command	no	no	command	command	command
printf	built-in	built-in	built-in	built-in	built-in	built-in	built-in
sed	command	command	command	command	command	command	command
sort	command	command	command	command	command	command	command
split	command	command	command	no	command	command	command
tail	command	command	command	command	command	command	command
tr	command	command	command	command	command	command	command
tsort	command	command	no	no	command	command	command
unexpand	command	command	no	no	command	command	command
uniq	command	command	command	command	command	command	command
wc	command	command	command	command	command	command	command

Files

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
basename	command	command	command	command	command	command	command
cal	command	command	no	no	command	command	command
cd	built-in	built-in	built-in	built-in	built-in	built-in	built-in
chgrp	command	command	no	command	command	command	command
chmod	command	command	command	command	command	command	command
chown	command	command	no	command	command	command	command
cp	command	command	command	command	command	command	command
dd	command	command	no	command	command	command	command
df	command	command	no	command	command	command	command
dirname	command	command	command	command	command	command	command
du	command	command	command	command	command	command	command
file	command	command	no	no	command	command	command
find	command	command	command	command	command	command	command
fuser	no	command	no	no	command	no	command
link	command	command	no	no	command	no	command
ln	command	command	command	command	command	command	command
ls	command	command	command	command	command	command	command
mkdir	command	command	command	command	command	command	command
mkfifo	command	command	no	command	command	command	command
mv	command	command	command	command	command	command	command
rm	command	command	command	command	command	command	command
rmdir	command	command	command	command	command	command	command
tee	command	command	command	command	command	command	command
touch	command	command	command	command	command	command	command
unlink	command	command	no	no	command	no	command

Processes

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
bg	built-in	built-in	built-in	built-in	built-in	built-in	built-in
fg	built-in	built-in	built-in	built-in	built-in	built-in	built-in
kill	built-in	built-in	built-in	built-in	built-in	built-in	built-in
nice	command	command	no	command	command	command	command
nohup	command	command	no	no	command	yes	command
ps	command	command	command	command	command	command	command
renice	command	command	no	no	command	command	command
wait	built-in	built-in	built-in	built-in	built-in	built-in	built-in

Job Control

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
at	no	command	no	no	command	command	command
batch	no	command	no	no	command	command	command
jobs	built-in	built-in	built-in	built-in	built-in	built-in	built-in

Development

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
ar	command	command	no	no	command	command	command
asa	no	command	no	no	command	command	no
c99	no	command	no	no	command	no	command
cflow	no	no	no	no	no	no	no
ctags	no	command	no	no	command	command	no
cxref	no	no	no	no	no	no	no
diff	command	command	command	no	command	command	command
fort77	no	no	no	no	no	no	no
gencat	command	command	no	no	command	no	command
iconv	command	command	command	no	command	command	command
lex	no	command	no	no	command	command	no
m4	no	command	command	no	command	command	no
make	command	command	no	no	command	command	command
man	command	command	no	no	command	command	command
nm	command	command	no	no	command	command	command
patch	no	command	command	no	command	command	command
strings	command	command	no	command	command	command	command
strip	command	command	no	no	command	command	command
vi	command	command	command	command	command	command	command
yacc	no	command	command	no	command	command	no

Admin

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
crontab	command	command	no	command	command	command	command
getconf	command	command	no	no	command	command	command
ulimit	built-in	built-in	built-in	built-in	built-in	built-in	built-in
umask	built-in	built-in	built-in	built-in	built-in	built-in	built-in
who	command	command	no	no	command	command	command

Terminal

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
stty	command	command	no	no	command	command	command
tabs	command	command	no	no	command	command	command
tty	command	command	no	no	command	command	command

Comm

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
mailx	no	command	no	no	command	command	no
mesg	command	command	no	no	command	command	command
talk	no	command	no	no	command	command	no
uucp	no	no	no	no	command	no	no
uudecode	no	command	no	no	command	command	no
uuencode	no	command	no	no	command	command	no
uustat	no	no	no	no	command	no	no
uux	no	no	no	no	command	no	no

Compression

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
compress	no	command	no	no	command	command	no
pax	no	command	no	no	command	command	no
uncompress	no	command	no	no	command	command	command
zcat	command	command	no	command	command	command	command

Additional Useful Commands

Built-in

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
declare	built-in	no	built-in	no	built-in	no	no
function	built-in	no	built-in	no	built-in	built-in	no
local	built-in	built-in	built-in	built-in	built-in	no	built-in
popd	built-in	no	built-in	no	built-in	no	no
pushd	built-in	no	built-in	no	built-in	no	no
shopt	built-in	no	built-in	no	built-in	no	no
typeset	built-in	no	built-in	no	built-in	built-in	no

Shell

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
ash	no	no	no	command	no	no	no
bash	command	no	command	command	command	command	command
csh	no	command	no	no	command	command	no
dash	no	no	no	no	no	no	command
ksh	no	no	no	no	command	command	no
ksh93	no	no	no	no	no	command	no
tcsh	no	command	no	no	command	command	no
zsh	no	no	no	no	command	command	no

Scripting Language

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
perl	no	command	command	no	command	command	command
python	command	no	no	no	command	command	command
python2	command	no	no	no	no	no	command
python3	no	no	no	no	no	no	command
ruby	no	no	no	no	command	command	command

Programming

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
seq	command	command	no	command	command	command	command
units	no	command	no	no	command	command	no
yes	command	command	no	command	command	command	command

Text

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
less	command	command	command	command	command	command	command

Files

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
chroot	no	command	no	command	command	no	command
cksum	command	command	no	no	command	command	command
locate	no	command	no	no	command	command	command
lsof	no	no	no	no	command	no	command
mktemp	command	command	no	command	command	command	command
mount	command	command	no	command	command	no	command
stat	command	command	no	no	command	command	command
sum	command	command	no	no	command	command	command
sync	command	command	no	command	command	command	command
tar	command	command	command	command	command	command	command
umount	command	command	no	command	command	no	command
whereis	command	command	no	no	command	no	command
which	command	command	command	command	command	command	command

Processes

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
killall	no	command	no	command	command	no	command
pgrep	command	command	no	command	command	command	command
pkill	command	command	no	no	command	command	command

Development

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
git	no	no	command	no	command	command	no

Admin

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
dmesg	command	command	no	command	command	command	command
free	command	no	no	command	no	no	command
reboot	no	command	no	command	command	no	command
shutdown	no	command	no	command	command	no	command
su	command	command	no	no	command	command	command
sudo	command	command	no	command	command	command	command
uptime	command	command	no	command	command	command	command

Terminal

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
clear	command	command	command	command	command	command	command
screen	no	no	no	no	command	command	command
tmux	no	no	no	no	no	no	command

Network

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
curl	command	no	command	no	command	command	command
dig	no	no	no	no	command	no	command
hostname	command	command	no	no	command	command	command
ifconfig	no	command	no	command	command	no	command
mtr	no	no	no	no	no	no	command
nc	no	command	no	command	command	command	command
netstat	command	command	no	command	command	command	command
nslookup	no	no	no	command	command	no	command
ping	command	command	no	command	command	no	command
rsync	no	command	no	no	command	command	command
scp	command	command	command	command	command	command	command
ssh	command	command	command	command	command	command	command
wget	command	no	no	command	no	command	command

Compression

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
bzip2	command	command	command	no	command	command	command
gzip	command	command	command	command	command	command	command
zip	no	no	no	no	command	command	no

Misc

	centos-7	freebsd-10	msys	openwrt-12	osx-10	solaris-11	ubuntu-14.04
history	built-in	no	built-in	no	built-in	yes	no
logout	built-in	no	built-in	no	built-in	no	no
openssl	command	command	command	no	command	command	command
watch	command	command	no	no	no	no	command
whoami	command	command	no	no	command	command	command
xdg-open	no	no	no	no	no	command	no