| I tested. So, before editing (after jenkins restart - OS restart not necessary) looks like this:
<?xml version='1.1' encoding='UTF-8'?>
<hudson.plugins.jira.JiraGlobalConfiguration plugin="ji...@3.0.7">
<sites class="hudson.util.PersistedList"/>
</hudson.plugins.jira.JiraGlobalConfiguration>
after edit, it looks the same. Nothing changed in file, but the configuration is available after save and reload the page. Of course, the file owner is the jenkins user, who runs the jenkins also:
root@dnd-dev:/opt/dndsys/server/jenkins/jenkins_home# ls -al hudson.plugins.jira.Jira*
-rw-r--r-- 1 jenkins jenkins 196 May 3 10:43 hudson.plugins.jira.JiraGlobalConfiguration.xml
-rw-r--r-- 1 jenkins jenkins 117 May 3 10:43 hudson.plugins.jira.JiraProjectProperty.xml
and the Jenkins process data:
root@dnd-dev:/opt/dndsys/server/jenkins/jenkins_home# ps fax | grep jenki
11281 ? Sl 2147:26 /opt/dndsys/lang/java8/bin/java -Djava.awt.headless=true -XX:MaxPermSize=128m -Xmx1024m -DJENKINS_HOME=/opt/dndsys/server/jenkins/jenkins_home -jar /opt/dndsys/server/jenkins/jenkins.war --logfile=/var/log/jenkins/jenkins.log --httpPort=PORT_NUMBER --debug=5 --handlerCountMax=100 --handlerCountMaxIdle=20 --prefix=/jenkins
And the jenkins's home, also owned by jenkins
root@dnd-dev:/opt/dndsys/server/jenkins# ls -al | grep jenkins_home
drwxr-xr-x 34 jenkins jenkins 12288 Jul 24 16:37 jenkins_home
There is nothing relevant (jira, Global, etc.) at jenkins.log |