How do I suspend and resume a sequence of commands in Bash?

Question

I have cmd2 that needs to follow after cmd1 completes. I need to pause cmd1 sometimes.

I type in

$ cmd1 &         


        

Answer 1

Run it in a subshell:

(cmd1 && cmd2)

Example:

$ (sleep 5 && echo 1)                        # started the command chain
^Z
[1]+  Stopped         ( sleep 5 && echo 1 )  # stopped before `sleep 5` finished
$ fg                                         # resumed
( sleep 5 && echo 1 )
1                                            # `sleep 5` finished and `echo 1` ran