Re: How to properly empty log files
On Fri, Oct 17, 2008 at 09:44:43AM +0100, Chris Davies wrote:
> François Cerbelle <francois@cerbelle.net> wrote:
> > you can "truncate" the file with the folowing bash line :
> > > /var/log/mail.err
>
> > or the following portable line :
> > echo > /var/log/mail.err
>
> Neither of those will work in this instance, as the file is held open
> for writing. On the next write, the data will be written into the file
> at the same place as if you hadn't truncated it (all the preceding data
> will appear to be NULLs).
Are you sure? The above method works fine for me.
>
> Incidentally, "echo > x" writes a newline to the file, so it's not zero
> length. You might like to use ": > x" instead.
Right.
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