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SU(1)				 User Commands				 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, --command=COMMAND pass a single COMMAND to the shell with -c --session-command=COMMAND pass a single COMMAND to the shell with -c and do not create a new session -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) 2006 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of the GNU General Public License <>. There is NO WARRANTY, to the extent permitted by law.


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 5.97 March 2012 SU(1)

1994 Man-cgi 1.15, Panagiotis Christias <>