atq version (return code: 0)
2 Fri Feb 24 20:47:00 2017 b ubuntu
4 Fri Feb 24 20:53:00 2017 b ubuntu
3 Fri Feb 24 20:53:00 2017 b ubuntu
1 Fri Feb 24 20:47:00 2017 b ubuntu
atq --help (return code: 1)
atq: invalid option -- '-'
Usage: at [-V] [-q x] [-f file] [-mMlbv] timespec ...
at [-V] [-q x] [-f file] [-mMlbv] -t time
at -c job ...
atq [-V] [-q x]
at [ -rd ] job ...
atrm [-V] job ...
batch