The set Command Besides manipulating Korn shell options, the set command can be used to display a list of your local and exported variables. $ set EDITOR=vi ENV=${HOME:?}/.env FCEDIT=/bin/ed HOME=/home/anatole LOGNAME=anatole MAILCHECK=600 PATH=:/usr/bin:/usr/ucb:/usr/5bin PPID=180 . . . It can also be used to "manually" reset positional parameters. For example: $ set X Y Z would set $1 to X, $2 to Y, $3 to Z, and $# to 3: $ print $1 $2 $3 $# X Y Z 3 The positional parameters $@ and $* would be set X Y Z: $ print $* X Y Z $ print $@ X Y Z The $* and $@ parameters are basically the same, except for the way they are expanded when surrounded with double quotes. The positional parameters in $@ are interpreted as separate strings, while in the $*, they are interpreted as a single string. Using $@, the wc command counts three separate strings $ print "$@" | wc w 3 while with $*, only one string is counted: $ print "$*" | wc w 1 To manually set positional parameters that begin with the ?/span> character, use the set ?/span> command. $ set ? X Y Z $ print ?$* ?span>X Y Z All the positional parameters can be unset with the set command: $ set A B C $ print $* A B C $ set ??/span> $ print $* $ | 
