Reading package lists... 63%
[1]+  Stopped                 sudo apt-get update
Reading package lists... Done
[1]+  Stopped                 sudo apt-get update

root@box:~#                                         
root@box:~# fg
bash: fg: job has terminated
[1]+  Done                    sudo apt-get update
root@box:~# fg
bash: fg: current: no such job
root@box:~#