Maintenance release validation after the Service pack or Cumulative fix pack installation on AEM

Statement: What are the ways to install/Validate Service pack or cumulative fix pack
Solution:

Installation Methods

• Package Manager UI ✔
• Package Manager HTTP API (Curl) ✔
• File System (crx-quickstart/install) !
• Bootstrap ✖

Installation Validation:

• OSGi bundles state
• Sub Packages
• Error logs
• Sling OSGi Installer Mbean : Active -> false, ActiveResourceCount -> 0
• Product version (/system/console/productinfo)
• Package Manager Activity Logs
• Last but not the least – Do a hands-on sanity test to ensure AEM is good to use post installation