满意答案

ai_yuming

2017.08.26

采纳率：50%    等级：8

已帮助：759人

如何查看mysql 默认端口号和修改端口号

1. 登录mysql

[root@test /]# mysql -u root -p

Enter password:

2. 使用命令show global variables like 'port';查看端口号

mysql> show global variables like 'port';

+---------------+-------+

| Variable_name | Value |

+---------------+-------+

| port | 3306 |

+---------------+-------+

1 row in set (0.00 sec)

3. 修改端口，编辑/etc/my.cnf文件，早期版本有可能是my.conf文件名，增加端口参数，并且设定端口，注意该端口未被使用，保存退出。

[root@test etc]# vi my.cnf

[mysqld]

port=3506

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

user=mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

"my.cnf" 11L, 261C written

[root@test etc]#

4. 重新启动mysql

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

Stopping mysqld: [ OK ]

Starting mysqld: [ OK ]

5.再次登录后检查端口已修改为’3506’.

[root@test etc]# mysql -u root -p

Enter password:

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

Your MySQL connection id is 2

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> show global variables like 'port';

+---------------+-------+

| Variable_name | Value |

+---------------+-------+

| port | 3506 |

+---------------+-------+

1 row in set (0.00 sec)

mysql>

总结：注意修改的端口不要被占用，而且要有规划，不要轻意的总是调整数据库端口。还有就是安全保障，记得与负责网络的人提前通知，以免端口无法正常使用。

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