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atq

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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

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