nginx安装不能下载pcre yum更新问题resolve host 'mirrors.vonline.vn'"

[root@iz25m0z7ik3z ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0

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DNS1=8.8.8.8
DNS2=8.8.4.4

3. 重启network 服务

[root@iz25m0z7ik3z ~]# service network restart

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1. Shutting down interface eth0:  Device state: 3 (disconnected)  
2.                                                            [  OK  ]  
3. Shutting down interface eth1:                              [  OK  ]  
4. Shutting down loopback interface:                          [  OK  ]  
5. FATAL: Module off not found.  
6. Bringing up loopback interface:                            [  OK  ]  
7. Bringing up interface eth0:  Active connection state: activated  
8. Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/2  
9.                                                            [  OK  ]  
10. Bringing up interface eth1:  RTNETLINK answers: File exists  
11. RTNETLINK answers: File exists  
12.                                                            [  OK  ]  
13. FATAL: Module off not found.  

4. 如下提示表示network  服务 与 NetworkManager服务冲突

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1. Bringing up interface eth0:  Active connection state: activated  
2. Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/2  
3.                                                            [  OK  ]  

应该是之前安装了图形界面“X Window System”导致。

5. 停止NetworkManager

[root@iz25m0z7ik3z ~]#  service NetworkManager stop

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1. Stopping NetworkManager daemon:                            [  OK  ]  

6. 再次重启 network 服务

[root@iz25m0z7ik3z ~]#  service network restart

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1. Shutting down interface eth0:                              [  OK  ]  
2. Shutting down interface eth1:                              [  OK  ]  
3. Shutting down loopback interface:                          [  OK  ]  
4. FATAL: Module off not found.  
5. Bringing up loopback interface:                            [  OK  ]  
6. Bringing up interface eth0:  Determining if ip address 10.44.153.37 is already in use for device eth0...  
7.                                                            [  OK  ]  
8. Bringing up interface eth1:  Determining if ip address 101.200.188.182 is already in use for device eth1...  
9. RTNETLINK answers: File exists  
10.                                                            [  OK  ]  
11. FATAL: Module off not found.  

7. 该警告一般是由于网卡解析arp协议导致的，可在网卡的配置文件中加入ARPCHECK=NO参数来屏蔽该检查

[root@iz25m0z7ik3z ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0

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ARPCHECK=no

再次启动网卡

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1. Shutting down interface eth0:                              [  OK  ]  
2. Shutting down interface eth1:                              [  OK  ]  
3. Shutting down loopback interface:                          [  OK  ]  
4. FATAL: Module off not found.  
5. Bringing up loopback interface:                            [  OK  ]  
6. Bringing up interface eth0:                                [  OK  ]  
7. Bringing up interface eth1:  RTNETLINK answers: File exists  
8.                                                            [  OK  ]  
9. FATAL: Module off not found.  

至此yum update 一切正常。