Any Unix nerds here?
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Call the cops
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Whats the problem mate?
See you, you ****. I'll cut you first...
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There is no help for those who have chosen the path to the dark side.I am not qualified to give the above advice!
The original point and click interface by
Smith and Wesson.
Step back, have a think and adjust my own own attitude from time to timeComment
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Thanks mate.Originally posted by Mr Crosby
Probably the daftest question ever but I'm a Cisco kid and my knowledge of Unix is somewhat limited so please excuse my igorance!!!
Basically we're running MRTG on an HP-UX server and wondered what the "-" right at the beginning of the line means in the following text within the crontab file >>>>>
-* * * * root /home/mrtg/fwdev01.shCall the copsComment
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I thought the first 5 columns were integer values that specify when the 6th field (command) should run.
- can be used between 2 integer values such as 9-11 in the second column would let the job run between 9am to 11am
Does the job run? what does the log in /var/cron say?Last edited by Mr Crosby; 30 January 2007, 12:48.
See you, you ****. I'll cut you first...
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sorry it's actuallyOriginally posted by Mr Crosby I thought the first 5 columns were integer values that specify when the 6th field (command) should run.
- can be used between 2 integer values such as 9-11 in the second column would let the job run between 9am to 11am
Does the job run? what does the log in /var/cron say?
-* * * * *
so there are 5 columns after the -Call the copsComment
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Looks like it shouldn't be there!
+---------------- minute (0 - 59)
| +------------- hour (0 - 23)
| | +---------- day of month (1 - 31)
| | | +------- month (1 - 12)
| | | | +---- day of week (0 - 7) (Sunday=0 or 7)
| | | | |
* * * * * command to be executed
e.g. 0 0 1 * * cd \;rm -r * &
Which equates to, at midnight on the first day of every month, delete everything from root up. (stops when the rm command file is deleted)Do you think people who pack the confectionary into boxes at fudge making factories tell people what they do for a living?Comment
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The comment # without 3 of the strokes?Comment
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There is also the extened syntax in crontab that does some stuff. I have used this for MRTG before, so if I wanted my MRTG to run every 5 minutes i would do
*/5 * * * * root /usr/local/bin/mymrtgscript.sh
As far as the -, I have seen it used to indicate every minute / hour / day between 2 numbers, though this varies between flavours of cron. So for example if you wanted something to run every minute between the first 30 mins of every hour you would do....
1-30 * * * * root /usr/local/bin/mymrtgscript.sh
Or every hour between 9 and 12
1 9-12 * * * root /usr/local/bin/mymrtgscript.sh
You get the idea...Politicians are wonderfull people, as long as they stay away from things they don't understand, like working for a living!Comment
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