Good information guys! I knew about less decompression and use that a
lot. I should have been clearer that the zcat usage was so I could grep
for something in a compressed (and normally large) syslog archive.
I like Rusty's explanation of logrotate because I have looked at it in the
past and could never make heads or tails of how it worked. I knew the
basics of why it existed but not any details. Maybe one of these days when
I have nothing else to do I will look at it again :)
Larry
On Thu, May 10, 2012 at 9:01 AM, Matt Graham <
danceswithcrows@usa.net>wrote:
> From: "Carruth, Rusty" <Rusty.Carruth@smartstoragesys.com>
> [snip logrotate info]
> > On a slightly different topic, I have found that some versions of 'less'
> > will automatically decompress compressed files to text. Or at least,
> > one time I mistakenly said 'less /var/log/syslog*' when some of them
> > were zipped, and LO! I didn't see any binary junk - it decompressed them
> > for me. YMMV!
>
> This is actually found in *all* versions of less, at least since 1999, but
> the
> environment variable that controls this feature isn't always set. An older
> Ubuntu didn't set it, f'rinstance. That's:
>
> export LESSOPEN='|lesspipe.sh %s'
>
> ...so less, when invoked, checks that LESSOPEN var and pipes files through
> /usr/bin/lesspipe.sh , which checks the filename for a metric ton of common
> patterns and attempts to invoke appropriate decompressers for those
> patterns.
> Like "bzip2 -dc" for files ending in .bz2 , "bzip2 -dc | tar tvvf -" for
> files
> ending in .tar.bz2 , and so forth.
>
> --
> Matt G / Dances With Crows
> The Crow202 Blog: http://crow202.org/wordpress/
> There is no Darkness in Eternity/But only Light too dim for us to see
>
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