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rated 0 times [  30] [ 0]  / answers: 1 / hits: 24994  / 2 Years ago, thu, july 28, 2022, 11:15:54

I have a text file in my home directory which receives data regularly through a cron job. Because the cron job provides dynamic data, I would also want to set a cron job to empty the file contents (the file must still exist). I don't need help with cron, just the command which can help with emptying the file.


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5

The simplest way:



> filename


This is a less obvious way and probably less readable in a shell script by others, but it's all you need.



Because > is not actually a really command (it is bash builtin) you can't use:



sudo > filename


when you don't have permissions on that file. But you can use:



sudo bash -c "> filename"

[#29480] Saturday, July 30, 2022, 2 Years  [reply] [flag answer]
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