文件 /usr/libexec/mysqld 不存在或不可執行

每當我嘗試通過命令啟動 MySQL

service mysqld start

我收到以下錯誤：

MySQL Daemon failed to start.
Starting mysqld:                                           [FAILED]

並查看日誌，我看到了這一點：

150706 14:52:12 mysqld_safe The file /usr/libexec/mysqld
does not exist or is not executable. Please cd to the mysql installation
directory and restart this script from there as follows:
./bin/mysqld_safe&
See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information

每當我 cd 到 /usr/ 並執行命令時，我都會收到相同的錯誤：

[root@www usr]# ./bin/mysqld_safe
150707 10:15:19 mysqld_safe Logging to '/var/log/mysqld.log'.
150707 10:15:19 mysqld_safe The file /usr/libexec/mysqld
does not exist or is not executable. Please cd to the mysql installation
directory and restart this script from there as follows:
./bin/mysqld_safe&
See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information

我在 CentOS 6.6 版上。如何啟動 MySQL？

在CentOS 6.6您可以檢查是否mysql-server安裝了：

rpm -qi mysql-server

你可以安裝它：

yum install mysql-server

或重新安裝它：

yum reinstall mysql-server

引用自：https://unix.stackexchange.com/questions/214361