# 1.停掉MySQL进程[root@standby ~]# /etc/init.d/mysqld stopShutting down MySQL... SUCCESS! [root@standby ~]## 2.mysqld_safe配置跳过授权表启动MySQL[root@standby ~]# mysqld_safe --skip-grant-tables --user=mysql &[1] 1670[root@standby ~]# 170311 15:00:16 mysqld_safe Logging to ‘/application/mysql-5.1.72/data/standby.err‘.170311 15:00:16 mysqld_safe Starting mysqld daemon with databases from /application/mysql-5.1.72/data[root@standby ~]## 3.进入MySQL[root@standby ~]# mysqlWelcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 1Server version: 5.1.72 Source distributionCopyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.mysql># 4.更改root密码mysql> use mysql;Database changedmysql> mysql> update user set password=password(‘123456‘) where user=‘root‘ and host=‘localhost‘;Query OK, 1 row affected (0.01 sec)Rows matched: 1  Changed: 1  Warnings: 0mysql> mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)mysql> select user,host,password from mysql.user;+------+-----------+-------------------------------------------+| user | host      | password                                  |+------+-----------+-------------------------------------------+| root | localhost | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 || wiki | localhost | *A5DB2D927D6DF94DA5E1CE4B293AEAAB4D8304EA || root | 127.0.0.1 |                                           |+------+-----------+-------------------------------------------+3 rows in set (0.00 sec)mysql> delete from user where user=‘root‘ and host=‘127.0.0.1‘;Query OK, 1 row affected (0.00 sec)mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)mysql> select user,host,password from mysql.user;+------+-----------+-------------------------------------------+| user | host      | password                                  |+------+-----------+-------------------------------------------+| root | localhost | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 || wiki | localhost | *A5DB2D927D6DF94DA5E1CE4B293AEAAB4D8304EA |+------+-----------+-------------------------------------------+2 rows in set (0.00 sec)mysql># 5.停止mysqld_safe方式开启的MySQL进程[root@standby ~]# mysqladmin -uroot -p123456 shutdown170311 15:11:08 mysqld_safe mysqld from pid file /application/mysql-5.1.72/data/standby.pid ended[1]+  Done                    mysqld_safe --skip-grant-tables --user=mysql[root@standby ~]# [root@standby ~]# [root@standby ~]# lsof -i:3306[root@standby ~]# ps -ef |grep mysqlroot       1967   1330  0 15:11 pts/1    00:00:00 grep --color=auto mysql# 6.正常开启MySQL[root@standby ~]# /etc/init.d/mysqld startStarting MySQL. SUCCESS! [root@standby ~]#