freebsd man page for jexec

JEXEC(8)						    BSD System Manager's Manual 						  JEXEC(8)

NAME
     jexec -- execute a command inside an existing jail

SYNOPSIS
     jexec [-u username | -U username] jail command ...

DESCRIPTION
     The jexec utility executes command inside the jail identified by its jid or name.

     The following options are available:

     -u username
	     The user name from host environment as whom the command should run.

     -U username
	     The user name from jailed environment as whom the command should run.

SEE ALSO
     jail_attach(2), jail(8), jls(8)

HISTORY
     The jexec utility was added in FreeBSD 5.1.

BUGS
     If the jail is not identified by jid there is a possible race in between the lookup of the jail and executing the command inside the jail.
     Giving a jid has a similar race as another process can stop the jail and start another one after the user looked up the jid.

BSD
								   May 27, 2009 							       BSD