Is it possible to overwrite core jira file?

java
jira-server

#1

Is is possible to overwrite core jira file in specyfied path on the server? I want to overwrite jira\WEB-INF\classes\templates\plugins\fields\view\view-multiselect.vm to make a little different view. I want to do this via jira plugin? Is is possible?


#2

It is possible to overwrite if you want to. I don’t know how its done. Also, I just learned that jira.war is deprecated.