To rollback the packages of a former installation you can undo the YUM transaction that made the upgrade:
Enable the rollback feature in YUM by setting
tsflags=repackagein the/etc/yum.conf.Find out the transaction ID of the upgrade you want to revert.
sudo yum historywill list all the transactions. Withsudo yum history info [transaction id]you can show details of a transaction.Roll back the transaction by calling
sudo yum history undo [transaction id].
If you want to downgrade one or all packages to a specific version you need to use the
yum downgrade command together with the full qualified package names you want to
downgrade, for example:
sudo yum downgrade cm8-cms-tomcat-14-1.release
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