MySQL修改端口号(修改mysql的端口号会有问题吗)

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关于mysql的端口号

先登录mysql:

fegy@fegy-X542UN:~$ mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.26-0ubuntu0.18.04.1 (Ubuntu)

Copyright (c) 2000, 2019, 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.

输入命令：

 show global variables like 'port';

mysql> show global variables like 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.04 sec)

value的值即是自己的端口号；这里是3306,即默认端口号。

修改默认的端口号：

打开文件my.cnf,然后增加端口参数，设定端口，注意该端口应是未被使用的，注意一定要先保存再退出

fegy@fegy-X542UN:~$ vim 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
fegy@fegy-X542UN:~$

重启mysql:

fegy@fegy-X542UN:~$ service mysqld restart

查看mysql基本信息：

输入命令：

status;

mysql> status;
--------------
mysql  Ver 14.14 Distrib 5.7.26, for Linux (x86_64) using  EditLine wrapper

Connection id:		4
Current database:	
Current user:		root@localhost
SSL:			Not in use
Current pager:		stdout
Using outfile:		''
Using delimiter:	;
Server version:		5.7.26-0ubuntu0.18.04.1 (Ubuntu)
Protocol version:	10
Connection:		Localhost via UNIX socket
Server characterset:	latin1
Db     characterset:	latin1
Client characterset:	utf8
Conn.  characterset:	utf8
UNIX socket:		/var/run/mysqld/mysqld.sock
Uptime:			3 hours 10 min 3 sec

Threads: 1  Questions: 9  Slow queries: 0  Opens: 105  Flush tables: 1  Open tables: 98  Queries per second avg: 0.000
--------------