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CentOS5.5，今天刚遇到的问题总结一下。
症状：服务器ping不通，所有网络连接失效，重启后正常。此现象反复出现，解决办法：
查看日志：
vim /var/log/messages 出现以下情况：
Jun 9 09:00:10 localhost restorecond: Will not restore a file with more than one hard link (/etc/resolv.conf) No such file or directory

分析：hard link没有正常建立，重新建立即可。

解决办法：
1. $ ls -i /etc/resolv.conf #get inode
2. 8292064 /etc/resolv.conf
3. $ sudo find /etc -inum 8292064#find hard link
4. Password:
5. /etc/sysconfig/networking/profiles/default/resolv.conf
6. /etc/resolv.conf
7. $ sudo /usr/sbin/lsof|grep resolv.conf #make sure it is not open
8. $ sudo rm /etc/sysconfig/networking/profiles/default/resolv.conf #delete
9. $ sudo restorecon /etc/resolv.conf
10. $ sudo ln /etc/resolv.conf /etc/sysconfig/networking/profiles/default/resolv.conf #recreate hard link