[root@master ~]# rpm -qa|grep -i mysql

--查询linux系统中是否安装mysql数据库

mysql-devel-5.1.66-2.el6_3.x86_64

perl-DBD-MySQL-4.013-3.el6.x86_64

mysql-5.1.66-2.el6_3.x86_64

mysql-server-5.1.66-2.el6_3.x86_64

qt-mysql-4.6.2-25.el6.x86_64

mysql-libs-5.1.66-2.el6_3.x86_64

You have new mail in /var/spool/mail/root

[root@master ~]# /etc/init.d/mysqldstart

--启动mysql，也可以使用命令：service mysqld start

Initializing MySQL database: Installing MySQL system tables... OK Filling help tables... OK To start mysqld at boot time you have to copy support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER ! To do so, start the server, then issue the following commands: /usr/bin/mysqladmin -u root password 'new-password' /usr/bin/mysqladmin -u root -h master.cloudera password 'new-password' Alternatively you can run: /usr/bin/mysql_secure_installation which will also give you the option of removing the test databases and anonymous user created by default. This is strongly recommended for production servers. See the manual for more instructions. You can start the MySQL daemon with: cd /usr ; /usr/bin/mysqld_safe & You can test the MySQL daemon with mysql-test-run.pl cd /usr/mysql-test ; perl mysql-test-run.pl Please report any problems with the /usr/bin/mysqlbug script! [ OK ] Starting mysqld: [ OK ]

[root@master ~]# /usr/bin/mysqladmin -u root password root

--设置root密码

[root@master ~]# mysql -u root@localhost

--登陆到mysql

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

Your MySQL connection id is 8

Server version: 5.1.66 Source distribution

Copyright (c) 2000, 2012, 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>quit

补充：

[root@master ~]# /etc/inint.d/mysqld stop

--停止mysql，也可以使用命令：service mysqld stop

[root@master ~]# /etc/inint.d/mysqld restart

--重启mysql，也可以使用命令：service mysqld restart