Here is your link.... https://confluence.atlassian.com/adminjiraserver073/installing-jira-applications-on-linux-861253030.html
I advice you to read the documentation in each upgrade seperately, e.g v7.3 to v7.4 , v7.4 to v7.5 and so on! So you are full informed about the changes which made i each version
Then you can determine what is the best way for you to make the upgrade!
Best regards
CM
First hit on any search engine is the standard upgrade documentation you need to start with. https://confluence.atlassian.com/adminjiraserver/upgrading-jira-applications-938846936.html
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