I want to upgrade existing shop from 18.104.22.168 to 22.214.171.124
What are the steps should be followed to accomplish this work?
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Please follow of this official documentation
Follow the Steps
Step1:- First, check that core file is change or not using below link
This step for only security person you can skip this if you don't change anything in Magento Core Files.
Step2: - Upload Magento 1.8 Database in PHPMyAdmin
Step3: - Setup Magento 1.9.3 and while installation Select Magento 1.8 Database
Step 4: - Take Custom Modules and Extensions files[1.App 2.Skin 3.Js] from Old Magento
This is the best and Secure way to Upgrade Magento