Let's say you want to do a local client copy, and for this you need to Suspend all the jobs till you finish, this is the easiest way how to do it:

1. Go to SE38 and run the report: BTCTRNS1 - Suspends all Released Jobs. Released Jobs will have the status Released/Susp. in transaction SM37.

2. Again from SE38 run : BTCTRNS2 - In order to Reverse Suspend for all Released Jobs