Hello,
We are currently on Jenkins version - 2.289.3 on a CentOS 7 host.
We will be upgrading our hosts to rocky linux 9 soon.
I would like to know if we can continue using the same version of Jenkins even after upgrading the OS to rocky 9.
Thanks,
RS
Hello @ranisom and welcome to this community. 
Yes, you should be able to continue using Jenkins version 2.289.3 after upgrading your OS to Rocky Linux 9.
Moving away from Centos 7 is a wise decision, congrats.
Rocky Linux 9 is a supported OS
As long as you have a compatible version of Java installed on your Rocky Linux 9 system, Jenkins 2.289.3 should continue to work as expected.
However, it’s always a good idea to test your Jenkins setup in a non-production environment after the OS upgrade to ensure everything works as expected. Also, keep in mind that you may need to re-install or update any Jenkins plugins or other dependencies that have specific OS requirements.
And… last but not least, it would be better to switch to a more recent version of Jenkins now that you have a new server.
This blog post could maybe help you.
Hi Bruno,
Thank you so much for all the detailed explanation. Really appreciate your response. We do have a non prod environment where we will be upgrading rocky 9 first before doing it on our production. Upgrading to the newer version of Jenkins is still in the works but since rocky 9 has been our priority, wanted to make sure our current version would still work on the new OS.
Thanks,
RS
Hi Bruno,
Is there anyway we can save the jenkins log to the disk ?
Last Friday we had this issue on Jenkins where the pipelines were not building anything and we could not get to the log.
org.jenkinsci.plugins.scriptsecurity.scripts.UnapprovedUsageException: script not yet approved for use
at org.jenkinsci.plugins.scriptsecurity.scripts.ScriptApproval.using(ScriptApproval.java:474)
at org.jenkinsci.plugins.workflow.cps.CpsFlowDefinition.create(CpsFlowDefinition.java:120)
at org.jenkinsci.plugins.workflow.cps.CpsFlowDefinition.create(CpsFlowDefinition.java:67)
at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:310)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)
Finished: FAILURE
I thought jenkins.log or jenkins.out would exist somewhere but did not see it anywhere in the default location or under $JENKINS_HOME.
Can you please suggest how the log can be saved in our local drive ?
Thanks,
RS