Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
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$FreeBSD: stable/10/usr.sbin/jexec/jexec.8 286064 2015-07-30 04:53:53Z jamie $

.Dd Jul 11, 2015 .Dt JEXEC 8 .Os .Sh NAME .Nm jexec .Nd "execute a command inside an existing jail" .Sh SYNOPSIS .Nm .Op Fl l .Op Fl u Ar username | Fl U Ar username .Ar jail Op Ar command ... .Sh DESCRIPTION The .Nm utility executes .Ar command inside the .Ar jail identified by its jid or name. If .Ar command is not specified then the user's shell is used.

p The following options are available: l -tag -width indent t Fl l Execute in a clean environment. The environment is discarded except for .Ev HOME , SHELL , TERM , USER , and anything from the login class capability database for the user. t Fl u Ar username The user name from host environment as whom the .Ar command should run. t Fl U Ar username The user name from jailed environment as whom the .Ar command should run. .El .Sh SEE ALSO .Xr jail_attach 2 , .Xr jail 8 , .Xr jls 8 .Sh HISTORY The .Nm utility was added in .Fx 5.1 . .Sh BUGS If the jail is not identified by .Ar jid there is a possible race in between the lookup of the jail and executing the command inside the jail. Giving a .Ar jid has a similar race as another process can stop the jail and start another one after the user looked up the .Ar jid .