[root@linux-tys root]# rpm -qa | grep bind
bind-9.2.1-16 -----这个版本的DNS不太稳定，所以要升级到9.2.1之上的版本
redhat-config-bind-1.9.0-13
bind-utils-9.2.1-16
ypbind-1.11-4
1、删除9.2.1的包，因这个版本不太稳定
[root@linux-tys root]# rpm -e bind-9.2.1-16 ----删除包时可以看到提示有关联的包，需要先删除
error: Failed dependencies:
bind is needed by (installed) redhat-config-bind-1.9.0-13
bind is needed by (installed) caching-nameserver-7.2-7
bind >= 9.1.3-0.rc2.3 is needed by (installed) caching-nameserver-7.2-7
[root@linux-tys root]# rpm -e caching-nameserver-7.2-7
warning: /etc/named.conf saved as /etc/named.conf.rpmsave
[root@linux-tys root]# rpm -e redhat-config-bind-1.9.0-13 ----删除图形配置工具
[root@linux-tys root]# rpm -e bind-9.2.1-16 ----删除DNS包
warning: /etc/rndc.key saved as /etc/rndc.key.rpmsave ----提示有一个文件保存于……
[root@linux-tys root]# rm -f /etc/rndc.key.rpmsave
[root@linux-tys root]# rm -f /etc/named.conf.rpmsave
[root@linux-tys root]# rpm -e bind-utils-9.2.1-16
[root@linux-tys root]# rpm -qa | grep bind
ypbind-1.11-4 -----此包与DNS无关
注意：卸载时最后卸工具包，安装时要先安装工具包
2、安装9.2.2的包
[root@linux-tys sharedoc]# rpm -ivh bind-utils-9.2.2-13Thiz.i586.rpm ----应先安装工具包
warning: bind-utils-9.2.2-13Thiz.i586.rpm: V3 DSA signature: NOKEY, key ID f2b3fb5e
Preparing... ############## [100%]
1:bind-utils ############## [100%]
[root@linux-tys sharedoc]# rpm -ivh bind-9.2.2-13Thiz.i586.rpm
warning: bind-9.2.2-13Thiz.i586.rpm: V3 DSA signature: NOKEY, key ID f2b3fb5e
Preparing... ############## [100%]
1:bind ############## [100%]
附:linux dns 客户端配置
[root@linux-clt named]# more /etc/resolv.conf
nameserver 172.16.1.1 -----第一个DNS服务器
nameserver 61.139.2.69
nameserver 192.168.80.10
search sky.com
domain sky.com