RPM/DNF

Spec

Scriptlet	Install	Upgrade	Uninstall
%pretrans	$1 == 1	$1 == 2	N/A
%pre	$1 == 1	$1 == 2	N/A
%post	$1 == 1	$1 == 2	N/A
%preun	N/A	$1 == 1	$1 == 0
%postun	N/A	$1 == 1	$1 == 0
%posttrans	$1 == 1	$1 == 2	N/A

On upgrade, the scripts are run in the following order:

%pretrans of new package
%pre of new package
(package install)
%post of new package – service currently started here
%triggerin of other packages (set off by installing new package)
%triggerin of new package (if any are true)
%triggerun of old package (if it’s set off by uninstalling the old package)
%triggerun of other packages (set off by uninstalling old package)
%preun of old package
(removal of old package)
%postun of old package – service currently stopped here
%triggerpostun of old package (if it’s set off by uninstalling the old package)
%triggerpostun of other packages (if they’re set off by uninstalling the old package)
%posttrans of new package