Shell Scripting Syntax (Toggle Plain Text)

...
/usr/bin/df -g | grep -i /bp1db01_bk|awk '{sub (/%/, "", $7); print $7" "$4}' > fs_usage
...

... /usr/bin/df -g | grep -i /bp1db01_bk|awk '{sub (/%/, "", $7); print $7" "$4}' > fs_usage ...

That worked perfect but now i get this error msg for the next line.
My dumb brain can't figure out how to fix it

if [ `cat fs_usage |awk '{print $2}` -gt 36 ]

I tried to change it and put another quotation mark but it didn't solve the issue.

"0403-012 A test command parameter is not vaild."

That's what happens when you've been looking at the problem too long. I'm going through the same thing now on my own project ('updating' Smoothwall Express to use LFS 6.4). Boy am I overlooking stuff that doesn't become obvious very quickly!

Your awk code is missing the closing apostrophe. And you'll probably find $1 has the numeric value to compare.