How to change mysql port number in ubuntu
How can I can change port number of mysql from 3306 to my choice of number (1023) in Ubuntu 13.10? I tried by editing the port number in file: /etc/mysql/my.cnf
. But after this change mysql doesn't start. Please guide me so I can fix this.
Solution 1:
There may be multiple files containing mysql configuration. Their full path may exists in file /etc/mysql/my.cnf
by lines starting !includedir
.
For a sample, mine is:
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/
So, after listing the second dir, I found a file named:
/etc/mysql/mysql.conf.d/mysqld.cnf
So You have to change the port number in this file.
The best way for you is viewing the file:
/etc/my.cnf
or
/etc/mysql/my.cnf
and then changing port number in a file inside one of directories included my.cnf file.
Solution 2:
For Ubuntu Desktop
at about version 18.04
, it was enough to edit the /etc/mysql/mysql.conf.d/mysqld.cnf
file:
From:
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
log-error = /var/log/mysql/error.log
To:
[mysqld]
port = 3308 (or other number) <-------------------
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
log-error = /var/log/mysql/error.log
Finally, it's mandatory to restart the server by running: sudo systemctl restart mysql
in the terminal.
You can confirm the new settings by running the command: show variables like '%port%';
in the MySQL Console
(mysql>
) which generates output something like:
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| admin_port | 33062 |
| large_files_support | ON |
| mysqlx_port | 33060 |
| mysqlx_port_open_timeout | 0 |
| port | 3308 |
| report_host | |
| report_password | |
| report_port | 3308 |
| report_user | |
| require_secure_transport | OFF |
+--------------------------+-------+
10 rows in set (0.02 sec)
As you can see, I now have the port
value: 3308
.
Solution 3:
MySQL server and client uses a file called my.cnf. You need to open /etc/my.cnf (Global mysqld configuration file) to specify new port. MySQL Change Default Port
Open /etc/my.cnf file:
# vi /etc/my.cnf
Set new port 5123:
port=5123
Here is is my sample /etc/my.cnf file:
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
port=5123
old_passwords=1
bind = 10.10.29.66
key_buffer = 500M
table_cache = 4000
sort_buffer_size = 3M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
max_connections = 400
query_cache_type = 1
query_cache_limit = 1M
query_cache_size = 100M
max_allowed_packet = 1M
thread_cache_size = 8
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 4
local-infile=0
[mysql.server]
user=mysql
basedir=/var/lib
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[mysqldump]
quick
max_allowed_packet = 16M
Save and close the file. Restart mysqld:
# service mysqld restart
Please note that once port changed, you need to update all your php, perl, python scripts including iptables scripts.
Solution 4:
In order to start MySQL or any other service on a port number below 1024, you need to start the service as the root
user.