The Archives

  • 30.Dec.08
    rsync with ssh-rsa+authorized_keys security, shell | pfortuny | (0)
    Much like explained in a previous post, one can use a passwordless RSA key to set up a cron job doing an rsync of one's computer on a remote server, via ssh. The relevant part of the authorized_keys file is (everything in the same line): command="rsync --server -vlogDtpr . /home/pfortuny/backup/",no-port-forwarding, no-agent-forwarding,no-X11-forwarding,no-pty ssh-rsa ..... Taking into account that the -vlogDtpr depends on the specific options of the rsync command you issue. In my case, the script is simply (right now) $ cat ./bin/backup.sh #!/bin/sh cd /home/pfortuny /usr/bin/rsync -av -e "ssh -i /home/pfortuny/.ssh/backup_key" --filter ": .rsync.dirs" \ ~/ pfortuny@remote.server.mine:"~/backup/" Comments: The option -av is expanded to -vlogDtpr on the server, ...
  • 17.Oct.08
    DHCP, inverted commas and ssh with RSA automated, security | pfortuny | (1)
    There is a server I manage (called alex) which has not a fixed IP. As you know, I have a shell at the best Unix server out there (by the way, it is almost free. The problem is to keep an up-to-date record of the first server's IP address. I do it as follows (and yes, I know timtowtdi). What I did was: Create an RSA public/private key pair at alex: alex $ ssh-keygen -N'' -f 'id_alex' -t rsa which creates the files id_alex and id_alex.pub. Create a cron job for my account at alex which looks like 5,10,15,20,25,30,35,40,45,50,55,0 * * * * /usr/bin/ssh -i ...