Synchronize two computers
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From: Rodolfo Medina on 21 Jan 2010 08:50 Rodolfo Medina wrote: >>> I just bought the Acer One netbook, on which Lenny seems to work > fine. What I >>> need now is: >>> >>> 1) connect it to my old Hyundai laptop so to share data between the two; >>> >>> 2) periodically save, e.g. to the Hyundai the changes I made in my home >>> directory in the Acer and viceversa. I wish that only the files > that really >>> changed were copied, so to save useless time. >>> >>> Can anybody provide suggestions about both issues? I've never > connected two >>> machines together. Sjoerd Hardeman <sjoerd(a)lorentz.leidenuniv.nl> writes: > Set up a small network. It might be an option to buy a router with a dhcp > server (should be possible for a few 10$'s). That saves some configuration > hassle. Else just buy a crosslink cable and set the networks on both computers > appropriately. >> I'd keep it simple : ssh + rsync. > Run: > rsync -auvz --delete ssh://remotepc/dir/on/other/pc /dir/on/this/pc > to get the new stuff from the other pc to the one you're currently working > on. To update, just reverse: > rsync -auvz --delete /dir/on/this/pc ssh://remotepc/dir/on/other/pc > > -auvz does: > -a => archive: saves permissions, users etc, > -u => update: only newer files are transmitted. without this option older > changes will be transmitted too, which might result in a loss of current > changes > -v => verbose: can also use -P, giving a progress indicator > -z => compress: faster over (slow) networks Thanks for your explanation. Do I have to install ssh? I'm immediately searching shops for a crosslink cable, but then how do I "set the networks on both computers appropriately"? Sorry for my ignorance, but as I said, though I've been using Debian for some years now, I've never managed two computers together before. Rodolfo -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Rodolfo Medina on 21 Jan 2010 09:10 On Qui, 21 Jan 2010, Rodolfo Medina wrote: >> 2) it seems to me that rsync processes *all* the files and not only the ones >> that really have changed, which would take long with my 2G home dir. >> Maybe >> some special option of rsync? Eduardo M KALINOWSKI <eduardo(a)kalinowski.com.br> writes: > How are you calling rsync? That's exactly what it doesn't. It only transfers > files that have changed, and only the parts that have changed. > > Naturally, it needs to look at each file to see if they are equal or not, it > cannot guess which files are changed. By default this is based on the > modification time (and possibly size, I'm not sure), which is rather fast. I'm always calliing it without the -u option. Maybe that's why it is so slow?? I do exactly: rsync -vr --delete Mail News /mnt/pendrive1 Rodolfo -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Johannes Wiedersich on 21 Jan 2010 09:20 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Joe wrote: > Unison will indeed do it, but the GUI will expect to find the source and > destination as directories. If you are already running a Samba > file-sharing server on one of the machines, that is the simplest way. You don't need a samba server to use unison between two computers. IMHO the simplest way is to use *unison-gtk* via ssh. No need to setup samba. rsync is just one-way, while unison will synchronize in both directions and will detect which of computers A or B has the current version. (Optionally files can even be merged, if both have changed.) - -- Johannes Three nations have not officially adopted the International System of Units as their primary or sole system of measurement: Burma, Liberia, and the United States. http://en.wikipedia.org/wiki/Si_units -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAktYYg0ACgkQC1NzPRl9qEXdqgCeJPwfRhggWberX0QevdBYu4Q3 OMkAn0KTKir3dztDzVqcSIdSwsQUlIw8 =CLp/ -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Johannes Wiedersich on 21 Jan 2010 09:30 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Rodolfo Medina wrote: > Eduardo M KALINOWSKI <eduardo(a)kalinowski.com.br> writes: >> Naturally, it needs to look at each file to see if they are equal or not, it >> cannot guess which files are changed. By default this is based on the >> modification time (and possibly size, I'm not sure), which is rather fast. > > > I'm always calliing it without the -u option. Maybe that's why it is so slow?? > I do exactly: > > rsync -vr --delete Mail News /mnt/pendrive1 Try the -a (archive) option. It will transfer the information on the modification time. - -- Johannes Three nations have not officially adopted the International System of Units as their primary or sole system of measurement: Burma, Liberia, and the United States. http://en.wikipedia.org/wiki/Si_units -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAktYYuoACgkQC1NzPRl9qEUm3ACeIhm8Kx6m4wbgqjtkxwoX/+Ma hFMAn3a0M8m3nMk8899iRtWI40IEnp0r =8ELr -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Marc Olive on 21 Jan 2010 09:40
El Thursday 21 January 2010 13:34:32 Aioanei Rares va escriure: > I'd keep it simple : ssh + rsync. Even simpler: use Unison -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org |