drwx------ 2 mysql mysql 4096 9月 8 00:14 performance_schema
drwxr-xr-x 2 mysql mysql 4096 9月 8 00:08 test
[root@CentOS data]# chgrp -R mysql CentOS.err
[root@CentOS data]# ls -l
总用量 29736
-rw-rw---- 1 mysql mysql 1585 9月 8 00:16 CentOS.err
-rw-rw---- 1 mysql mysql 6 9月 8 00:16 CentOS.pid
-rw-rw---- 1 mysql mysql 18874368 9月 8 00:16 ibdata1
-rw-rw---- 1 mysql mysql 5242880 9月 8 00:16 ib_logfile0
-rw-rw---- 1 mysql mysql 5242880 9月 8 00:16 ib_logfile1
drwxr-xr-x 2 mysql mysql 4096 9月 8 00:14 mysql
-rw-rw---- 1 mysql mysql 27293 9月 8 00:14 mysql-bin.000001
-rw-rw---- 1 mysql mysql 1031892 9月 8 00:14 mysql-bin.000002
-rw-rw---- 1 mysql mysql 107 9月 8 00:16 mysql-bin.000003
-rw-rw---- 1 mysql mysql 57 9月 8 00:16 mysql-bin.index
drwx------ 2 mysql mysql 4096 9月 8 00:14 performance_schema
drwxr-xr-x 2 mysql mysql 4096 9月 8 00:08 test
连接本机MySQL
[root@localhost mysql]#mysql –u root –p
提示输入password，默认为空，按Enter即可
断开连接
mysql>exit;
为root账户设置密码
[root@localhost ~]# cd /usr/local/mysql/bin
[root@localhost mysql]# ./bin/mysqladmin -u root password 123456
Enter Password:123456
设置选项文件，将配置文件拷贝到/etc下
[root@localhost mysql]# cp support-files/my-medium.cnf /etc/mysql.cnf
设置开机自启动
[root@localhost mysql]# cp support-files/mysql.server /etc/init.d/mysql
[root@localhost mysql]# chmod +x /etc/init.d/mysql
通过服务来启动和关闭Mysql
[root@localhost ~]# service mysql start
[root@localhost ~]# service mysql stop
5.安装设置完毕，之后使用只需启动-连接-断开-关闭，命令如下：
[root@CentOS mysql]# service mysql start
Starting MySQL.. [确定]
[root@CentOS mysql]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.5.22 Source distribution
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> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.07 sec)
mysql> exit;
Bye
[root@CentOS mysql]# service mysql stop
Shutting down MySQL. [确定]
6.其它：
查看进程命令 ps –ef|grep mysqld
kill进程命令 kill –9 进程号