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[util-vserver.git] / man / vsh.8

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-.de Sh \" Subsection
-.br
-.if t .Sp
-.ne 5
-.PP
-\fB\\$1\fR
-.PP
-..
-.de Sp \" Vertical space (when we can't use .PP)
-.if t .sp .5v
-.if n .sp
-..
-.de Ip \" List item
-.br
-.ie \\n(.$>=3 .ne \\$3
-.el .ne 3
-.IP "\\$1" \\$2
-..
-.TH "VSH" 8 "2004-07-29" "PlanetLab specific Vserver shell" "vsh"
-
-.SH NAME
-vsh \- Safely trampoline's a slice user from global vserver context to
-the correspondingly named local vserver context\&.
-
-.SH "SYNOPSIS"
- 
-.PP
-\fBvsh\fR [COMMAND] \fR
- 
-.TP
-[COMMAND]
-when specified, the command to run, otherwise vsh will just run the
-user's shell as a login shell
-
-.SH "SUMMARY"
- 
-.PP
-vsh is used as the login shell for slice users in the global vserver's
-/etc/passwd\&. It is invoked either by sshd when a slice user logs on
-to a PlanetLab node or as root using the su command\&. When this
-occurs, vsh switches vserver context and sets the uid/gid of the slice
-user, as specified in the slice's vserver /etc/passwd\&.
-
-.PP
-vsh assumes that the same account (by name) used to ssh/su into the
-vserver also exists in the vserver specific /etc/passwd file\&.  This
-is the only reason that for now it is deemed to be PlanetLab
-specific\&.