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Delete a file older than 30 minutes old

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beaster

beaster

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I have a file called alarm_sms.txt I need a command that will delete the file only after it is older than 30 minutes by system time.

Can anyone help?

//beaster
 
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Also, when I write to this file during the 30 minutes, can I preserve the file date? I want to avoid writing to the file, it updating the time it was written to, because I would never delete it if it kept updating the time stamp.

Basically, I want to write to the file for 30 minutes and delete it after that.

//beaster
 
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What about a cron job which deletes the file every 30 minutes?

Greg.
 
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