bup-on (1)

bup on <hostname> index ...

bup on <hostname> save ...

bup on <hostname> split ...

bup on runs the given bup command on the given host using ssh. It runs a bup server on the local machine, so that commands like bup save on the remote machine can back up to the local machine. (You don\[aq]t need to provide a --remote option to bup save in order for this to work.)

See bup-index(1), bup-save(1), and so on for details of how each subcommand works.

This \[aq]reverse mode\[aq] operation is useful when the machine being backed up isn\[aq]t supposed to be able to ssh into the backup server. For example, your backup server can be hidden behind a one-way firewall on a private or dynamic IP address; using an ssh key, it can be authorized to ssh into each of your important machines. After connecting to each destination machine, it initiates a backup, receiving the resulting data and storing in its local repository.

For example, if you run several virtual private Linux machines on a remote hosting provider, you could back them up to a local (much less expensive) computer in your basement.

• # First index the files on the remote server
  
  $ bup on myserver index -vux /etc
  bup server: reading from stdin.
  Indexing: 2465, done.
  bup: merging indexes (186668/186668), done.
  bup server: done
  
  # Now save the files from the remote server to the
  # local $BUP_DIR
  
  $ bup on myserver save -n myserver-backup /etc
  bup server: reading from stdin.
  bup server: command: \[aq]list-indexes\[aq]
  PackIdxList: using 7 indexes.
  Saving: 100.00% (241/241k, 648/648 files), done.    bup server: received 55 objects.
  Indexing objects: 100% (55/55), done.
  bup server: command: \[aq]quit\[aq]
  bup server: done
  
  # Now we can look at the resulting repo on the local
  # machine
  
  $ bup ftp \[aq]cat /myserver-backup/latest/etc/passwd\[aq]
  root:x:0:0:root:/root:/bin/bash
  daemon:x:1:1:daemon:/usr/sbin:/bin/sh
  bin:x:2:2:bin:/bin:/bin/sh
  sys:x:3:3:sys:/dev:/bin/sh
  sync:x:4:65534:sync:/bin:/bin/sync
  ...
  
  

bup-index(1), bup-save(1), bup-split(1)

Part of the bup(1) suite.

Avery Pennarun <[email protected]>.