Posts tagged tar

ssh for remote backups

posted on 2015-03-09 12:32:56

To backup a system's file, usually you employ scp. This is fine, as long as you want to backup only regular files.

If you want to backup non-regular files, this won't work and you will need ssh.

Especially:

tar cvJ <folder> | ssh -T -c blowfish -e none <user>@<host> "cat > /backup.tar."

Here are some hacks contained within:

  1. -T to prevent allocation of a pseudo-terminal so redirection works
  2. -cblowfish to not use 3DES encryption, which is faster
  3. -enone so no escape sequence is used. That way the transfer can not kill the connection if <escapesequence>. is found. (Usually it is this one: ~.)

If this stuff is not done, your transfer may or may not work.

Thanks to Jan Engelhardt of inai.de for this gem.

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