compress pictures

[Michael Havens]

I want to keep the original files I'm going to compress.  Looking through
the man file it looks as if I should use the option '--backup'.
Unfortunately I can't really decipher the manpage correctly. Is backup the
correct option, is there another I should use, or should I just copy the
directories I want to archive? This reminds me of another question I have:
when I append these files from the top level directory will it append the
files under it as well?

On Wed, Nov 30, er at 5:28 PM, Michael Havens <bmike1 at gmail.com> wrote:

> are the options 'op'uld A' and 'r' in 'tar' the same thing?
> 'm
>
> On Wed, Nov 30, 2011 at 5:07 PM, Matt Graham <danceswithcrows at usa.net>wrote:
>
>> From: Michael Havens <bmike1 at gmail.com>
>> > I want to compress a bunch [of] pictures to put a bunch on my zip
>> > drive. What is the best program to use?
>>
>> Most image formats are already compressed in some way.  JPEG, GIF, TIFF,
>> and
>> PNG are almost always compressed.  Compressing an already-compressed data
>> set
>> doesn't usually buy you very much at all, 1 or 2% if that.
>>
>> > I was thinking 'zip' would be good
>>
>> See above.  zip will work, though tar combined with bzip2 (or xz/lzma)
>> may be
>> more space-efficient at the cost of it taking longer to compress and
>> uncompress the data.  That's "tar cjf images.tar.bz2 images/" or "tar cJf
>> images.tar.xz images/" to create compressed tarballs of everything in the
>> images/ dir.  Replace "tar cjf" with "tar xjf" to uncompress.
>>
>> --
>> 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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>
>
>
> --
> :-)~MIKE~(-:
>



-- 
:-)~MIKE~(-:
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