SU(8) SU(8) NAME su, setlog - substitute userid temporarily, become super- user SYNOPSIS /etc/su [ user ] /etc/setlog logname command ... DESCRIPTION Su changes the userid to that of user (root by default) with groupid and login shell determined from the password file. If the current userid is not the super-user, the password for the new user is demanded. The userid stays in force until the new shell exits. The current directory and environment are unchanged unless the new userid is super-user, in which case the environment variables PS1 and PATH, if present, are set to standard val- ues (white space and /bin:/usr/bin:/etc). Setlog executes the specified command with login name logname. The environment is otherwise unchanged; in particu- lar, the userid is not set. Only the super-user may use this command. SEE ALSO sh(1), getuid(2), passwd(5)