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Of course!

I've gone the route of your 3rd example were I'm conditionally printing the string on the closing brace and notice that you've quite sensibly chosen to use an array of variables. I've...

Hope someone can help, I've been pulling my hair out with this one...

I've written a shell script that does a sanity check on our quite extensive Nagios configuration for anything that needs...

Change the "ls -lrt" to "ls -1rt" and get rid of the awk command.
You should also redirect stderr from the ls to /dev/null.

These all seem a bit obtuse, testing for numbers etc.
What about a simpler way...
if [[ -z $(grep "/usr2/bin/ftpd" /var/tmp/check.tmp) || -z $(tail -20 /usr2/logs/ftp.log | grep -i disconnecting)...