bg
[jobIDs]Put the current job or the jobIDs in the background. See the earlier section "Job Control."
To place a time-consuming process in the background, you might begin with:
4%nroff -ms report | col > report.txt
CTRL-Z
and then issue any one of the following:
5%bg
5%bg %
Current job 5%bg %1
Job number 1 5%bg %nr
Match initial string nroff 5%% &