Ghost - You are recommended to have at least 150 MB of memory available
Sometimes running Ghost on lower powered server like a Digital Ocean $5 droplet can cause the Ghost CLI to complain about lack of memory:
Message: You are recommended to have at least 150 MB of memory available for smooth operation. It looks like you have ~87 MB available.
--no-mem-check quickly bypasses this error and gets you on your way.
ghost update --no-mem-check