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RedHat 9 (Linux i386) - man page for su (redhat section 1)

SU(1)									FSF								     SU(1)

su - run a shell with substitute user and group IDs
su [OPTION]... [-] [USER [ARG]...]
Change the effective user id and group id to that of USER. -, -l, --login make the shell a login shell -c, --commmand=COMMAND pass a single COMMAND to the shell with -c -f, --fast pass -f to the shell (for csh or tcsh) -m, --preserve-environment do not reset environment variables -p same as -m -s, --shell=SHELL run SHELL if /etc/shells allows it --help display this help and exit --version output version information and exit A mere - implies -l. If USER not given, assume root.
Written by David MacKenzie.
Report bugs to <>.
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE.
The full documentation for su is maintained as a Texinfo manual. If the info and su programs are properly installed at your site, the com- mand info su should give you access to the complete manual. su (coreutils) 4.5.3 February 2003 SU(1)