[ale] scp, rcp, tar questions

[Charles Marcus]

thanks Joe... saved me a lot of time and headaches...

I was a little worried about messing up the tar command on a production box.

Now I'm gonna have to sit down and try to see how the syntax you gave me
corresponds to the mess of flags given on the man page.

Thanks again

Charles

> -----Original Message-----
> From: Joe at orado.localdomain.private
> [mailto:Joe at orado.localdomain.private]On Behalf Of Joseph A Knapka
> Sent: Thursday, February 14, 2002 11:06 AM
> To: Charles Marcus
> Cc: Ale (E-mail)
> Subject: Re: [ale] scp, rcp, tar questions
>
>
> Charles Marcus wrote:
> >
> > OK,
> >
> > I've gotta copy some stuff (home directory for one of our
> users) from a
> > remote server down in Fla to my local server here in Atl.
> >
> > I have never used the tar beyond untarring tarballs when installing
> > software, and never used the rcp command.  I am having
> trouble figuring out
> > the syntax, and the man pages aren't much help.  I'd spend
> the time trying
> > to figure it out myself, but this guys will be here in the
> morning, and I
> > was just told about it, so hope someone can hold my hand...
> >
> > So, what would the syntax be for tar/gzipping up a
> directory?  I *think it
> > would be:
> >
> > tar -z /home/username/* tarfile.name
>
> tar czvf tar-file-name.tgz /dir/to/tar
>
> Explanation:
>
> czvf == "c"reate the tarfile, compress using g"z"ip, be
>        "v"erbose (list all files added to the archive on stdout),
>        and I will explicitly provide the "f"ilename of the
>        tarfile as the /next/ argument. (The order of the
>        czvf flags is immaterial, could be "zvcf" or whatever.)
>
> tar-file-name.tgz must be the next argument after the "f"
> flag is seen.
>
> /dir/to/tar and all its contents (recursively) will be
> tarred (and compressed on the fly). Absolute pathnames
> will be converted to releative, that is, the leading
> "/" will be discarded from the names in the archive. So
> you must untar from root if that's where you want
> things to land.
>
> Untar that file using
>
> tar xzvf tar-file-name.tgz
>
> dir/to/tar and its contents will appear in the current
> directory.
>
> > One problem is, I'm on a private IP, NAT'd through to the
> internet, logging
> > into another computer with a private IP using NAT.
> >
> > So, when doing the remote copy (rcp), how do I specify the
> host names?  Just
> > use the IPs of the routers doing the port-forwarding?
>
> Yes. If you can log in to the box using rsh or ssh,
> then rcp/scp should work as well.
>
> >
> > Would it be:
> >
> > rcp -pr user at xxx.xxx.xxx.xxx:/home/tarfile.name
> user at xxx.xxx.xxx.xxx:/home
>
> rcp user at xxx.xxx.xxx.xxx:/path/to/tarfile .
>
> should work. You don't really need -r (since you're copying
> a single file), nor -p (since the tarfile will contain
> the file characteristics of the files in it). You only
> need the second user+hostname if you're copying to another
> remote machine.
>
> > Should I use scp?
>
> Yes. The scp command would be the same. Well, except
> s/rcp/scp/, natch.
>
> Cheers,
>
> -- Joe
> "I should like to close this book by sticking out any part of my neck
>  which is not yet exposed, and making a few predictions about how the
>  problem of quantum gravity will in the end be solved."
>  --- Physicist Lee Smolin, "Three Roads to Quantum Gravity"



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