How do I conduct an upgrade from Magento v18.104.22.168 to 22.214.171.124 ?
I'm thinking of upgrading Magento v126.96.36.199 to v188.8.131.52 I have never conducted this kind of operation. I have read there are two ways of doing it. Using SSH or Magento Back-Office. I know I can't upgrade directly from v184.108.40.206 to v220.127.116.11. I might need to pass by v18.104.22.168, v22.214.171.124 and v126.96.36.199 I have read loads of forums articles. None of them explains the process the same way.
What way is the best to conduct this operation (SSH or by Back-Office) ? How to conduct this operation via SSH ? How to conduct this operation via Back-Office ? How do I specify the name of the new version I want to install, from magento Back-Office (and from SSH) ? How do customers and admin data bases get updated after core and skin files ?
Thank you very much for your help !