Mount /usr/ports Inside Jail

Q.I'd like to save disk space for my
[url=javascript:;]FreeBSD[/url]
7 ISP server. We run webserver, nameserver from various jails under powerful HP RAID 10 server. How do I export /usr/ports from host to each
[url=javascript:;]jail[/url]
hosted on /jail/ volume such as /jail/www, /jail/ns, /jail/sql etc?
A.You need to use the mount_nullfs command. It creates a null layer, duplicating a sub-tree of the file system name space under another part of the global file system namespace. This allows existing files and directories to be accessed using a different pathname. You need to run this command outside jail. Login as
[url=javascript:;]root[/url]
and type the following command:
# D=/jail/www
# mkdir -p $D/usr/ports
# mount_nullfs /usr/ports $D/usr/ports
# mount | sort
Now login to jail called www (jail id # 10):
# jls
# jexec 10 sh
Try to install apache22:
# cd /usr/ports
# cd www/apache22
# make install clean

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/4206/showart_1408544.html

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