如何将mysql端口从0更改为3306？

Question

I find it hard to establish a link between JDBC and MySQL. I think one of the reasons is the mysql port. I checked the port with the statement: show variables like 'port'; in mysql. And the response is:

+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 0     |
+---------------+-------+
1 row in set (0.07 sec)

My operating system is archlinux. How can I change mysql port from 0 to 3306?

I have changed the port number in both /etc/my.cnf and /etc/mysql/my.cnf. But it didn't work.

Answer 1

First of all check what SHOW VARIABLES LIKE 'skip_networking'; if it reports skip_networking = On, your mysqld is started without networking support (which leads to an value of 0 in the port system variable).

If this is the case, you most likely have to check the init scripts for your mysqld, its most likely under /etc/init.d/mysql , search here for --skip-networking and comment out (delete) this part. After this procedure you have to restart your mysqld.

Normaly there is no need to set the port 3306 explicitly since 3306 is the default port for mjysqld to listen on.

Answer 2

On my ubuntu install, in /etc/mysql/my.cnf theres a line that says :

[mysqld]
port = 3306
<snip...>

Try changing this value accordingly and restarting mysql.

Hope it works for you.

Answer 3

You need to change this value from mysql configuration file. Steps are:

• To go to related file: sudo nano /etc/mysql/my.cnf

• To search for related line:(for Win, Linux) ctrl + w , (for Mac) cmd + w

port = 0

(look for twice for [client] and [mysqld] sections)

• Replace your new value

port = 3306

• Save and Exit

ctrl + x , cmd + x y

• Restart service

sudo service mysql restart

Answer 4

I had this problem because I had forgotten that I started mysqld with the --skip-networking flag in order to reset the MySQL root password, like so:

sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking &

Run ps aux | grep mysql ps aux | grep mysql and you may see the process (or a pair of them) hanging around still. If so, kill it/them and then restart mysql.

Answer 5

I met the same error in my MySQL8-community after I reset root's PWD by running mysqld --skip-grant-tables --skip-networking.

FLUSH PRIVILEGES; can't help for that even adding skip-networking =OFF and adding port=3306 in my.cnf and restart still can't help. then I found this solution

1. check which files override my.cnf

   sudo grep -rnw '/etc/' -e 'skip-networking

/etc/systemd/system/mysqld.service.d/override.conf:3:ExecStart=/usr/sbin/mysqld --skip-grant-tables --skip-networking /etc/my.cnf:28:#skip-networking

2. remove the override.conf

   rm -rf /etc/systemd/system/mysqld.service.d/override.conf

3. mysqld.service changed on disk

   systemctl daemon-reload

4. restart MySQL

   systemctl restart mysqld

Answer 6

You need to edit your mysql config file, my.cnf in /etc/my.cnf and change the port to 3306. Then restart mysql.

Source: http://www.cyberciti.biz/faq/change-default-mysql-port-under-linuxunix/

Edit:

This website might help you a bit more for your specific platform: https://wiki.archlinux.org/index.php/MySQL#Configuration

It has a portion talking about copying over your my.cnf file:

Copy your choice of config file:

# cp /usr/local/mysql/support-files/my-medium.cnf /usr/local/mysql/data/my.cnf

Answer 7

您可以在 MySQL 配置文件中更改端口号：my.cnf

Answer 8

allow remote connection fixed, didn't change " GLOBAL VARIABLES LIKE 'PORT';" edit my.cnf /etc/my.cnf

[mysqld]
user            = mysql
basedir         = /usr
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
datadir         = /var/lib/mysql
tmpdir          = /tmp
language        = /usr/share/mysql/English
bind-address    = 65.55.55.2
# your mysql server ip address should place in bind-address
# skip-networking

restart the mysql service