27 使用mysqladmin 关闭数据库

mysqladmin -uroot -poldboy123 shutdown
ps -ef |grep mysql

28 mysql忘记密码重新修改密码过程：

mysql> mysqld_safe --skip-grant-tables --user=mysql --defaults-file=/data/3306/my.cnf >/dev/null &

    -> mysqld_safe --skip-grant-tables --user=mysql  >/dev/null &

    -> update mysql.user set  password=password("oldboy111") where user='root' and host='localhost';

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'mysqld_safe --skip-grant-tables --user=mysql --defaults-file=/data/3306/my.cnf >' at line 1

mysql> update mysql.user set  password=password("oldboy111") where user='root' and host='localhost';

Query OK, 1 row affected (0.35 sec)

Rows matched: 1  Changed: 1  Warnings: 0

mysql> Terminated

在此 ，重新开启一个窗口杀掉mysql 注意！千万不要用kill-9 粗暴的杀死mysql，这样会导致数据库丢数据后果将非常严重

ill mysql

[root@root ~]# pkill mysql

[root@root ~]# pkill mysql

[root@root ~]# pkill mysql

[root@root ~]# pkill mysql

[root@root ~]# pkill mysql

[root@root ~]# pkill mysql

[root@root ~]# pkill mysql

[root@root ~]# /etc/init.d/mysqld start

Starting MySQL.... SUCCESS! 

[root@root ~]# ps -ef | grep mysql

root      10974      1  0 18:39 pts/2    00:00:00 /bin/sh /application/mysql/bin/mysqld_safe --datadir=/application/mysql/data --pid-file=/application/mysql/data/root.pid

mysql     11148  10974  3 18:39 pts/2    00:00:00 /application/mysql/bin/mysqld --basedir=/application/mysql --datadir=/application/mysql/data --plugin-dir=/application/mysql/lib/plugin --user=mysql --log-error=/application/mysql/data/root.err --pid-file=/application/mysql/data/root.pid

root      11181  10136  0 18:39 pts/2    00:00:00 grep mysql

[root@root ~]# mysql -uroot -poldboy111

Warning: Using a password on the command line interface can be insecure.

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

Your MySQL connection id is 4

Server version: 5.6.34-log MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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> \q

Bye

[root@root ~]# mysql -uroot -poldboy111

Warning: Using a password on the command line interface can be insecure.

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

Your MySQL connection id is 6

Server version: 5.6.34-log MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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>