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Hi, case statements cannot use regular expressions, they use pattern matches, which have a different syntax.

Since there is no specification in this thread of what shell is going to be used, this...

Perhaps something like this, you'll get the idea

trap clear EXIT
DIALOG=${DIALOG=dialog}
while :
do
rfcval=$($DIALOG --title "RFC NUMBER" --clear \
--inputbox "Please enter an...

To execute a command, put it in $( ). You can embed this inside "" quotes like a variable.

i.e.

echo "$(date +%Y-%m-%d-%H-%M-%S) server down"

I recomend YYYY-MM-DD-HH-MM-SS dates at the...

Assign "when" inside the loop.

You can grep -fgrplist on stdin from a pipe.

Nested loops look like e.g. while read atd
do while read grp
do your_commands
done < GRPLIST
done < ATDINFILE The outer...

I'm not sure it's 100% perfect. You should test it and make sure it's killing the logging processes correctly on logout.

if [ -z $PS1 ]
then
:
else
DATE="/bin/date" ...

Try replacing \s with [[:space:]]

There should not be double quotes around the regex...

You can put redirection and pipes after a here-doc so, something like tee filename <<EOF | sendmail -t
...
...
EOF

You don't need backreferences for that, just match zero or more -Suffix things like (-[A-Z][a-z]+)* Try my post above

Don't need to back reference anyway right? Have you tried just removing all the "?:"