如何查看mysql 默认端口号和修改端口号

Posted 2022-05-12 yangzongzhuan

1. 登录mysql 或者 ps ax|grep mysqld

[root@test /]# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \\g. Your MySQL connection id is 92 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>

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)
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