MySQL is the most popular open source relational database management system (RDBMS) in the world. MySQL is used by everyone from the simple small business website to the large internet giants like Facebook, Google or Amazon. In fact the contents of this page are even stored within MySQL.
Installing MySQL is a fairly common task for any systems administrator; especially if that administrator is running a standard LAMP stack (Linux, Apache, MySQL & PHP/Python/Perl).
The following steps outline how to install mysql on a Debian/Ubuntu server. These steps are fairly similar for Red Hat based distributions and can be used by simply replacing apt-get with yum.
Check whether MySQL is installed
[email protected]:/nfs# dpkg --list mysql No packages found matching mysql.
Depending on your system you may see packages with mysql in the name, if you do not see mysql-server than it is not likely that you have mysql installed.
Installing MySQL with apt-get
[email protected]:/nfs# apt-get install mysql-server mysql-client
During the installation you will be asked to provide a root password. I suggest making this password different than your servers root password especially if you have DBA's managing the MySQL instance but do not want them to have access to root on the server.
apt-get command will also install the mysql-client package which is necessary to login to mysql from the server itself.
Verifying MySQL is installed
MySQL will start automatically after the installation, to validate that it is installed and running properly you can do the following steps
Verify MySQL is listening
[email protected]:/nfs# netstat -na | grep 3306 tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN
Connect via the client
[email protected]:~# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 38 Server version: 5.5.28-0ubuntu0.12.04.2 (Ubuntu) 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>
If the above commands work than you are able to connect to mysql on localhost and start using it.
Change the listening address for MySQL
By default MySQL will listen on localhost (127.0.0.1) only, if you want to connect to MySQL from another server you will need to change this IP address to whatever IP you want to connect to. To do this simply edit the
my.cnf file and change the bind-address attribute
[email protected]:/nfs# vi /etc/mysql/my.cnf
# Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. bind-address = 127.0.0.1
# Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. bind-address = your.ip.address.here
Once the IP has been changed simply restart mysql.
[email protected]:~# restart mysql
[email protected]:~# service mysql restart