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what is the difference between "cron" command and "at" command?
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Answer / sureshreddy
at: this command to schedule the specified job onl once.
cron: this command to schedule the specified job repeatedly.
| Is This Answer Correct ? | 78 Yes | 5 No |
Answer / vishnu
Cron can be scheduled with different choices
(minute,hour,month,dayofmonth,dayofweek). cron can be
edited,deleted,listed,scheduled at any time and for
repeated time intervals.
AT can be scheduled for once.cannot be edited, can be
deleted, can be listed.
so, 2 main differences:-
cron:can be scheduled for repeated jobs
AT: can be scheduled for only once
cron can be edited
AT cannot be edited, after its schedule.
both can facilitate listing and deletion
| Is This Answer Correct ? | 35 Yes | 2 No |
Cron: is a daemond process its run periodical.Mince you can
run it in every (sec,min,hour,day,date,Month).We can't
remove a cron job we commenting that only.
here 6 fild to schedule a cron job.
At: only run on particular time specifies by user who
schedule that time you can remove a at job.
Ex:-
$at 9:30
>a.txt
>b.txt
[ctl+d]
Thanks,
Jagadeeb@gmail.com
| Is This Answer Correct ? | 15 Yes | 11 No |
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Unix Commands 
