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若是/etc/init.d/下面没有mysqld的话，service mysqld start也是很差使的，一样，chkconfig mysqld on也是不能用mysql

解决办法：sql

将mysql的mysql.server这个文件替换上去便可socket

首先到mysql的目录中，查找下spa

[root@test6_100 mysql]# find ./* -name mysql.server

./support-files/mysql.server

果真在这里，将这个文件添加到/etc/init.d/下，而且命名为mysqld便可code

cp  /usr/local/mysql/.support-files/mysql.server /etc/init.d/mysqld

从新启动server

/etc/init.d/mysqld start

Starting MySQL........... SUCCESS!

可是启动后，查看进程都在，可是提示这个错误进程

mysql -uroot -p

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

这个是由于/etc/my.cnf文件中没有指定sock文件的位置形成的，这个简单，直接作一个软链接便可

input

[root@test6_100 ~]# ln -s /tmp/mysql.sock /var/lib/mysql/mysql.sock

[root@test6_100 ~]# cd /var/lib/mysql/

[root@test6_100 mysql]# ll

total 0

lrwxrwxrwx 1 root root 15 Oct 24 03:21 mysql.sock -> /tmp/mysql.sock/tmp/mysql.sock /var/lib/mysql/mysql.sock

[root@test6_100 mysql]# mysql -uroot -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 2

Server version: 5.7.23-log MySQL Community Server (GPL)

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

还有一种办法就是在没有这个mysqld的状况下，用mysql/bin下的文件来启动也是能够的it

启动：io

mysqld_safe --user=mysql &

后面的 & 必定要带上！！！！

中止：

mysqladmin -uroot -p[password] shutdown