err....be careful with the dd one
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Guy Taylor
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On Fri, 7 Jan 2000, Angus Lees wrote:
> On Fri, Jan 07, 2000 at 01:15:52AM +1100, Shrestha wrote:
> > Is there any command under linux to clear the contents of a file.
> >
> > I don't want to delete the file but I want to delete everything which is
> > inside that file.
>
> ok, we've already had:
>
> cat /dev/null > file
>
> sh -c "> file"
>
>
> just because i'm bored:
>
> echo -n "" > file
>
> rm file && touch file
>
> dd if=/dev/random of=file count=0
>
> echo ,dXw | tr X '\n' | ed file
>
> grep -q 7 /dev/random > file
>
> (and many variants of those ideas)
>
>
> note also that any zero size file is the world's smallest
> self-replicating program:
>
> touch mkempty
> chmod a+x mkempty
> ./mkempty > file
>
>
> does that cover it ;)
>
> --
> - Gus
> --
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