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Your $SERVERFILE has a CR character at the line end (usually from being edited in WinDos).
Run dos2unix on it!

The redirect to /dev/null for standard output is not needed if you use the -q flag on grep because that means no output anyway.

Have you considered a database that is up & running but locked up...

It gets printed to standard output, which by default is your terminal, but pipes | and redirects > send it somewhere else.

$ echo "something"

something

$

Pipes grab the output of the...

Nope. > /dev/null is not a command, just a redirection, so doesn't affect $?

Well, usually doesn't. If the file can't be opened, the commands won't be run at all, and exit status ( $? ) will be...