Using YUM Repositories

After the uninstallation, install the older version:

1. Switch the repositories:

shell> sudo yum-config-manager --disable mysql80-community
shell> sudo yum-config-manager --enable mysql57-community

1. Verify that mysql57-community is enabled:

shell> yum repolist enabled | grep "mysql.*-community.*"
!mysql-connectors-community/x86_64 MySQL Connectors Community                 42
!mysql-tools-community/x86_64      MySQL Tools Community                      53
!mysql57-community/x86_64          MySQL 5.7 Community Server                227

1. Downgrades are tricky; it is better to remove the existing packages before downgrading:

shell> sudo rpm -qa | grep -i mysql-community | xargs sudo rpm -e --nodeps
warning: /etc/my.cnf saved as /etc/my.cnf.rpmsave

1. List the available versions:

shell> sudo yum list mysql-community-server
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.rackspace.com
 * epel: mirrors.develooper.com
 * extras: centos.s.uw.edu
 * updates: mirrors.syringanetworks.net
Available Packages
mysql-community-server.x86_64   5.7.20-1.el7                         mysql57-community

1. Install MySQL 5.7:

shell> sudo yum install -y mysql-community-server