cp / tar ???

pk21 · 01-05-2003, 12:12 PM

Hi all!

I want to make a backup of a hd, but the problem is i havent got that much space on my second disk. So when i copy the disk it has to zip the files. Anyone knows how i can get that to work???

cp -a olddisk newdisk | tar -xzvf ???

I know something like that should work.

moses · 01-05-2003, 12:53 PM

Do you want a single file on the new disk?

Code:

cd /src_dir
tar cvf - . | ( cd /dest_dir; gzip > foo.tgz )

or (better)

Code:

cd /src_dir
tar zcf /dest_dir/foo.tgz .

If you want everything compressed, but not tarred up:

Code:

cd /src_dir
tar cf - . | (cd /dest_dir; tar xvf -; gzip -r rcs)

N.B. This is not as efficient w.r.t. compression

pk21 · 01-05-2003, 03:54 PM

ok, thanks!!!

but i was also wondering how i can do this over a network with for example ssh.

moses · 01-05-2003, 06:04 PM

I think you'll have to gzip/tar up the files on the host machine,
then scp them to your client machine.

pk21 · 01-06-2003, 05:06 PM

thanks for replying, but that is not wat i meant. There has to be a command to put the output of 'tar' directly true a '|' and then 'scp' the tar.

In this way it won't require any space on the host you are making a backup off.

moses · 01-06-2003, 06:32 PM

Ok, I've read the scp and ssh man pages, and this is the way to do
it:

Code:

ssh -f user@server tar cvf - src_dir | ( cd /dest_dir; gzip > foo.tgz )

pk21 · 01-07-2003, 12:58 PM

Thanks!!!