????????一般我們默認mysql使用端口3306，那如果想要修改端口如何操作呢？這里介紹兩種方法，大家根據自己的實際情況進行選擇。

寶塔面板中修改

? ? ? ? 對于安裝了寶塔面板的人來說修改就太簡單了。只需要簡單的兩步就好了。

步驟1：配置修改

步驟2：重載配置文件后啟動

?步驟3： 檢查

mysql> show global variables like 'port'; ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect... Connection id: 1 Current database: *** NONE ***+---------------+-------+ | Variable_name | Value | +---------------+-------+ | port | 3305 | +---------------+-------+ 1 row in set (0.00 sec)mysql>

系統中直接修改配置文件

1. 登錄mysql ?

[root@test /]# mysql -u root -p ?
Enter password: ?

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

mysql> show global variables like 'port'; ?
+---------------+-------+ ?
| Variable_name | Value | ?
+---------------+-------+ ?
| port | 3306 | ?
+---------------+-------+ ?
1 row in set (0.00 sec) ?
?

3. 修改端口，

編輯/etc/my.cnf文件，早期版本有可能是my.conf文件名，增加端口參數，并且設定端口，注意該端口未被使用，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. 重新啟動mysql ?

??
[root@test ~]#?systemctl restart mysqld

??
5.再次登錄后檢查端口已修改為’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> ?

1. 登錄mysql ?

[root@test /]# mysql -u root -p ?
Enter password: ?

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

mysql> show global variables like 'port'; ?
+---------------+-------+ ?
| Variable_name | Value | ?
+---------------+-------+ ?
| port | 3306 | ?
+---------------+-------+ ?
1 row in set (0.00 sec) ?
?

3. 修改端口，

編輯/etc/my.cnf文件，早期版本有可能是my.conf文件名，增加端口參數，并且設定端口，注意該端口未被使用，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. 重新啟動mysql ?

??
[root@test ~]#?systemctl restart mysqld

??
5.再次登錄后檢查端口已修改為’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> ?

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