Red Hat

[root@ns1 named]# pwd
/var/named
[root@ns1 named]# ll chroot/var/named
total 0
[root@ns1 named]# service named start
Starting named:                                            [  OK  ]
[root@ns1 named]# ll chroot/var/named
total 36
drwxr-x---. 6 root  named 4096 Jan 26  2013 chroot
drwxrwx---. 2 named named 4096 Mar 28 23:21 data
drwxrwx---. 2 named named 4096 Mar 28 23:21 dynamic
-rw-r-----. 1 root  named 1892 Feb 18  2008 named.ca
-rw-r-----. 1 root  named  152 Dec 15  2009 named.empty
-rw-r-----. 1 root  named  152 Jun 21  2007 named.localhost
-rw-r-----. 1 root  named  168 Dec 15  2009 named.loopback
-rw-r--r--  1 root  root  3048 Sep 16 19:11 named.root
-rw-r--r--  1 root  named  492 Jul 17 14:43 scottn.ext.hosts
-rw-r--r--  1 root  named  630 Sep  2 17:21 scottn.int.hosts
[root@ns1 named]# ps -ef | grep named
named    31446     1  0 19:16 ?        00:00:00 /usr/sbin/named -u named -t /var/named/chroot
root     31455 30718  0 19:16 pts/0    00:00:00 grep named
[root@ns1 named]#
[root@ns1 named]# grep ^ROOTDIR /etc/sysconfig/named
ROOTDIR=/var/named/chroot