CentOS system MySQL Upgrade operation tutorial

There are a number of third-party sources on the web, upgrade MySQL at the same time, will also upgrade PHP, if only want to upgrade MySQL look below
1,mysql Official Source Address

Http://repo.mysql.com/yum

The latest is 5.7, see your preferences decide which version to upgrade to.

2, add source file

# Vim/etc/yum.repos.d/mysql-community.repo
[Mysql55-community]
Name=mysql 5.5 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.5-community/el/6/$basearch/
Enabled=1
Gpgcheck=0
Gpgkey=file:///etc/pki/rpm-gpg/rpm-gpg-key-epel-6

If you update MySQL when the error, gpgcheck=0 set into 0,gpgkey in the/ETC/PKI/RPM-GPG directory there are a lot of random choose a

3, update MySQL

# yum Install MySQL