I used this example
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails-application.html
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FreeBSD i386.localhost.bsd 7.0-RELEASE-p6 FreeBSD 7.0-RELEASE-p6 #0: Tue Dec 2 20:35:28 EST 2008 paul@i386.localhost.bsd:/usr/obj/usr/src/sys/GENERIC i386
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i386# jls
JID IP Address Hostname Path
3 192.168.0.77 http://www.example.org /usr/home/j/www
2 192.168.0.18 mail.example.org /usr/home/j/mail
1 192.168.0.17 ns.example.org /usr/home/j/ns
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails-application.html
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FreeBSD i386.localhost.bsd 7.0-RELEASE-p6 FreeBSD 7.0-RELEASE-p6 #0: Tue Dec 2 20:35:28 EST 2008 paul@i386.localhost.bsd:/usr/obj/usr/src/sys/GENERIC i386
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i386# jls
JID IP Address Hostname Path
3 192.168.0.77 http://www.example.org /usr/home/j/www
2 192.168.0.18 mail.example.org /usr/home/j/mail
1 192.168.0.17 ns.example.org /usr/home/j/ns