Provided by: umview_0.8.2-1.2_amd64
viewsu - change (virtual) user ID or become (virtual) superuser
viewsu [options] [username]
The viewsu command is used to become another user during a login session. Invoked without a username, viewsu defaults to becoming the superuser. The optional argument - may be used to provide an environment similar to what the user would expect had the user logged in directly. This command is the View-OS counterpart of the su(1) command. The value of $PATH is reset to /bin:/usr/bin for normal users, or /sbin:/bin:/usr/sbin:/usr/bin for the superuser. This may be changed with the ENV_PATH and ENV_SUPATH definitions in /etc/login.defs.
The options which apply to the viewsu command are: -c, --command COMMAND Specify a command that will be invoked by the shell using its -c. -, -l, --login Provide an environment similar to what the user would expect had the user logged in directly. When - is used, it must be specified as the last viewsu option. The other forms (-l and --login) do not have this restriction. -s, --shell SHELL The shell that will be invoked. The invoked shell is chosen from (highest priority first): · The shell specified with --shell. · The shell indicated in the /etc/passwd entry for the target user. · /bin/sh if a shell could not be found by any above method.
View-OS is a project of the Computer Science Department, University of Bologna. Project Leader: Renzo Davoli. <http://www.sourceforge.net/projects/view-os> Howto's and further information can be found on the project wiki <wiki.virtualsquare.org>.
Most part of the text is taken from su(1).