This is a quick reference of unix program's path locations.

Program	Path	Comment
awk	/bin/awk	MAC has it in /usr/bin
basename	/bin/basename	MAC has it in /usr/bin
cat	/bin/cat
cp	/bin/cp
cut	/usr/bin/cut
crontab	/usr/bin/crontab
df	/bin/df
date	/bin/date
domainname	/bin/domainname
find	/usr/bin/find
grep	/bin/grep	On Solaris, /usr/xpg4/bin/grep allows for extended pattern while the default do not (for example, -E only with xpg4) MAC has it in /usr/bin
hostname	/bin/hostname
id	/usr/bin/id	(checked only on Solaris & Linux)
mkdir	/bin/mkdir
mkfifo	/usr/bin/mkfifo
netstat	/bin/netstat /usr/sbin/netstat	Linux/Solaris True64
nm		This program do not have a standard location
ps	/bin/ps
pwd	/bin/pwd
rm	/bin/rm
sed	/bin/sed	MAC has it in /usr/bin
sort	/bin/sort
tail	/usr/bin/tail
test	/usr/bin/test	On MAC, it is /bin/test but on Linux, there are NO such file
uname	/bin/uname	MAC has it in /usr/bin
uniq	/usr/bin/uniq
touch	/bin/touch
uptime	/usr/bin/uptime
vmstat	/usr/bin/vmstat
wc	/usr/bin/wc
xargs	/usr/bin/xargs