1. 如何查看mysql 默認端口號和修改端口號 2015-03-19 17:42:18
4. 1. 登錄mysql
6. [root@test /]# mysql -u root -p
7. Enter password:
10. 2. 使用命令show global variables like ‘port‘;查看端口號
12. mysql> show global variables like ‘port‘;
13. +---------------+-------+
14. | Variable_name | Value |
15. +---------------+-------+
16. | port | 3306 |
17. +---------------+-------+
18. 1 row in set (0.00 sec)
21. 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，並且設定端口，註意該端口未被使用，保存退出。
23. [root@test etc]# vi my.cnf
24. [mysqld]
25. port=3506
26. datadir=/var/lib/mysql
27. socket=/var/lib/mysql/mysql.sock
28. user=mysql
29. # Disabling symbolic-links is recommended to prevent assorted security risks
30. symbolic-links=0
32. [mysqld_safe]
33. log-error=/var/log/mysqld.log
34. pid-file=/var/run/mysqld/mysqld.pid
36. "my.cnf" 11L, 261C written
37. [root@test etc]#
39. 4. 重新啟動mysql
41. [root@test ~]# /etc/init.d/mysqld restart
42. Stopping mysqld: [ OK ]
43. Starting mysqld: [ OK ]
45. 5.再次登錄後檢查端口已修改為’3506’.
47. [root@test etc]# mysql -u root -p
48. Enter password:
49. Welcome to the MySQL monitor. Commands end with ; or \g.
50. Your MySQL connection id is 2
51. Server version: 5.1.66 Source distribution
53. Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
55. Oracle is a registered trademark of Oracle Corporation and/or its
56. affiliates. Other names may be trademarks of their respective
57. owners.
59. Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
61. mysql> show global variables like ‘port‘;
62. +---------------+-------+
63. | Variable_name | Value |
64. +---------------+-------+
65. | port | 3506 |
66. +---------------+-------+
67. 1 row in set (0.00 sec)
69. mysql>
71. 總結：註意修改的端口不要被占用，而且要有規劃，不要輕意的總是調整數據庫端口。還有就是安全保障，記得與負責網絡的人提前通知，以免端口無法正常使用。

cent7.0 mysql 修改端口