[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