[求助] mysql無法啟動.

void123

我在后臺先在操作二級域名. 然后發(fā)現(xiàn)站登不上了.
發(fā)現(xiàn)貌似是mysql跪了.

1. ╰─$ service mysqld restart                                                
   
2. * MySQL manager or server PID file could not be found!
   
3. Starting MySQL
   
4. . * Manager of pid-file quit without updating file.

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然后
mysql的log是

1. 111 140513 16:26:11 mysqld_safe Starting mysqld daemon with databases from /www/    wdlinux/mysql-5.1.69/var
   
2. 112 ^G/www/wdlinux/mysql-5.1.69/libexec/mysqld: Can't find file: './mysql/plugin    .frm' (errno: 13)
   
3. 113 140513 16:26:11 [ERROR] Can't open the mysql.plugin table. Please run mysql_    upgrade to create it.
   
4. 114 140513 16:26:11 [ERROR] /www/wdlinux/mysql-5.1.69/libexec/mysqld: Can't crea    te/write to file '/www/wdlinux/mysql-5.1.69/var/ebs-25088.pid' (Errcode: 13)
   
5. 115 140513 16:26:11 [ERROR] Can't start server: can't create PID file: Permissio    n denied
   
6. 116 140513 16:26:11 mysqld_safe mysqld from pid file /www/wdlinux/mysql-5.1.69/v    ar/ebs-25088.pid ended

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求助. 系統(tǒng)是ubuntu12.04的server.
WDCP的版本應(yīng)該是最新的.