To restart a foreground process that you have suspended use the fg command. This command is not available if you are using the Bourne shell. For example:
lpr -Pps23 bigfile.ps ... ... ^Z Stopped date Thu Feb 18 16:11:05 GMT 1993 fg lpr -Pps23 bigfile.ps
This starts a process in the foreground and suspends it. The user then checks the date and restarts the foreground process.