As mentioned in the previous post, if you need to run cron jobs in linux, knowing how to debug them via mail is really important.
By the way, mail is the older program, the link above is to the man page of mailx which is the newer program created relatively recently, in 1986!
Navigating through messages in the mailbox is quite a challenge as I found.
So I decided to create a list of the commands which I used most frequently and found useful.
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