I realized today I wasn't getting mail notifications, and I hadn't set them up on this shell. So here are some things I do on my local machine that work here:
To get the shell to tell you when you have new mail, after command
executions, add this to your .profile
export MAILCHECK=0
And, if you want, you can have a persistent notification when you
have un-incorporated mail, or more specifically, when your
/var/mail/<username> isn't empty.
PS1="\$([-s /var/mail/`whoami` ] && echo '* ')$PS1"
This works in /bin/ksh, I can't speak for other shells.
If anybody else has some quick tips they would like to share, I encorage them to edit this page.
Happy Unixing!
~xvetrd
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