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MySQL无法重启问题解决Warning: World-writable config file ‘/etc/my.cnf’ is ignored

2016年12月2日

MySQL无法重启问题解决Warning: World-writable config file ‘/etc/my.cnf’ is ignored
http://www.ttlsa.com/mysql/warning-world-writable-config-file-etcmy-cnf-is-ignored/
今天帮朋友维护服务器,在关闭数据库的命令发现mysql关不了,提示Warning: World-writable config file ‘/etc/my.cnf’ is ignored ,大概意思是权限全局可写,任何一个用户都可以写。mysql担心这种文件被其他用户恶意修改,所以忽略掉这个配置文件。这样mysql无法关闭。
下面看下整个过程
重启MySQL

[[email protected] ~]# service mysqld stop
Warning: World-writable config file ‘/etc/my.cnf’ is ignored
Warning: World-writable config file ‘/etc/my.cnf’ is ignored
MySQL manager or server PID file could not be found![FAILED]
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[[email protected] ~]# service mysqld stop
Warning: World-writable config file ‘/etc/my.cnf’ is ignored
Warning: World-writable config file ‘/etc/my.cnf’ is ignored
MySQL manager or server PID file could not be found![FAILED]
可以看到mysql停止不了
查看my.cnf的权限

[[email protected] ~]# ls -l /etc/my.cnf
-rwxrwxrwx 1 root root 4878 Jul 30 11:31 /etc/my.cnf
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[[email protected] ~]# ls -l /etc/my.cnf
-rwxrwxrwx 1 root root 4878 Jul 30 11:31 /etc/my.cnf
权限777,任何一个用户都可以改my.cnf,存在很大的安全隐患.
修复MySQL问题

[[email protected] ~]# chmod 644 /etc/my.cnf
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[[email protected] ~]# chmod 644 /etc/my.cnf
my.cnf设置为用户可读写,其他用户不可写.
关闭MySQL

[[email protected] ~]# service mysqld stop
Shutting down MySQL..[ OK ]
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[[email protected] ~]# service mysqld stop
Shutting down MySQL..[ OK ]
MySQL关闭成功. 问题很简单

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