マンションの停電でサーバーの再起動をしたらmysqlが起動していないようなので確認。 [user@sv mysql]#tail -20 /var/log/mysqld.log 110926 21:51:11 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql /usr/libexec/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13) 110926 21:51:11 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. /usr/libexec/mysqld: Can't create/write to file '/tmp/***