| Where the behavior specified by the POSIX standard differs from the historical behavior provided by a command, Solaris provides a different version of the command in either /usr/xpg6/bin or in /usr/xpg4/bin. On Solaris systems, you should place these two directories into your search path before the standard /usr/bin directory. Some of these commands are not covered in this book, since they are either administrative commands or are obsolete. Also, today, it is unlikely that the commands in /usr/ucb will be useful; you probably should not have that directory in your search path. ar | delta | file | kill | nm | tail | awk | df | find | link | nohup | tr | basename | du | get | ln | od | ulimit | bc | ed | getconf | ls | pr | vedit | chgrp | edit | getopts | m4 | rm | vi | chown | egrep | grep | make | sccs | view | cp | env | hash | more | sed | wait | ctags | ex | id | mv | sh | who | date | expr | ipcs | nice | sort | xargs | dc | fgrep | jobs | nl | stty | | |