For yum (RHEL/CentOS 7 and below) there are yum-plugin-pre-transaction-actions and yum-plugin-post-transaction-actions packages. Examples on how to use it for pre-transaction and post-transaction but here's a sample file too:
#action_key:transaction_state:command # action_key can be: pkgglob, /path/to/file (wildcards allowed) # transaction_state can be: install,update,remove,any # command can be: any shell command # the following variables are allowed to be passed to any command: # $name - package name # $arch - package arch # $ver - package version # $rel - package release # $epoch - package epoch # $repoid - package repository id # $state - text string of state of the package in the transaction set # # file matches cannot be used with removes b/c we don't have the info available *:install:touch /tmp/$name-installed zsh:remove:touch /tmp/zsh-removed zsh:install:touch /tmp/zsh-installed-also /bin/z*h:install:touch /tmp/bin-zsh-installed z*h:any:touch /tmp/bin-zsh-any # each action is expanded once for each matching package, and no action is # executed twice per transaction, for example *:install:echo $repoid >>/tmp/repos # will write each repo only once to /tmp/repos, even if multiple packages from # the same repo were installed
For dnf (RHEL/CentOS 8 and up) there is a plugin at https://github.com/rpm-software-management/dnf-plugins-core/blob/master/plugins/post-transaction-actions.py for post-transaction, but nothing for pre-transaction. https://bugzilla.redhat.com/show_bug.cgi?id=967264 and https://bugzilla.redhat.com/show_bug.cgi?id=1788574 have more info . RHEL 8.2 is supposed to have the post-transaction feature. If you really need pre-transactions, you could modify the post-transaction code to create your own plugin for pre-transactions (and submit it as a PR).
