mysql数据库基础命令结尾

Posted 2020-09-21

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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

[[email protected] ~]# pkill mysql

[[email protected] ~]# /etc/init.d/mysqld start

Starting MySQL.... SUCCESS!

[[email protected] ~]# 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

[[email protected] ~]# 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)

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