Queue command to run after existing command finishes

Credit goes to this post at superuser. Probably due to poor planning/pipeline development, I sometimes want to queue up some other commands execute after an existing, long-running process has already been running for a while. I use Ctrl-z (pause) and fg (foreground) for this.
#Execute a long running program
#Realize you want to have another program execute after the first concludes, and hit Control-z to pause
#Set up a bash command to resume the paused program with fg, and run the next in queue.
fg; ./next_long_running_program.sh


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