Backup over the internet.

[Mike Tancsa]

Something piped through ssh using DSA keys.

e.g.

on the machine which you want backed up (client) to the machine where the 
backup file lives,

client machine:
su root
# if you have not yet created your ssh keys, do so now
ssh-keygen -d

on the server machine,

pw useradd clientmachineid -m
su clientmachineid
cd ~clientmachineid
ssh-keygen -d
cd .ssh
# from the client machine, put the root's id_dsa.pub and ONLY the .pub file 
here under the name authorized_keys2


#on the client machine,

ssh clientmachineid at server

#if all goes well, you will login without a password.


Now the backups.

If you need to preserve file access times and want to do incremental 
backups, use dump. If you dont care about munging file access times, and 
its just simple files, tar will work.


/sbin/dump -0uan -f - / | gzip -9 | /usr/bin/ssh -2 -c blowfish 
clientmachineid at backupserver.example.com dd 
of=/pathtohomedirectory/clientmachineid/dump-root-l0.gz


/usr/bin/tar -cpzf - /usr/local/etc /etc/mail/ | ssh -c blowfish 
clientmachineid at backupserver.example.com "cat - > 
/pathtohomedirectory/clientmachineid/backup.`date "+%d"`.tgz"


Blowfish is a bit faster than the others so I specify it.

         ---Mike

At 09:08 AM 7/15/2003 +0000, DanB wrote:
>What is the easy way to back up over the internet? What software should
>be used?
>
>Dan
>
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Mike Tancsa,                          	          tel +1 519 651 3400
Sentex Communications,     			  mike at sentex.net
Providing Internet since 1994                    www.sentex.net
Cambridge, Ontario Canada			  www.sentex.net/mike