Guide: Use Rsync Without Password

Guide: Use Rsync Without Password

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Guide: Guide: Use Rsync Without Password

You may have read using ssh, SCP and rsync but they all need a password which is understandable for security reasons. BTW… this is not recommended for a business area. However, there are times where you need to do this in cron so you need to do this without intervention. First, use the ssh-keygen on the local server to generate external and private keys. Note: When prompted to enter a password press the enter key, do not give you any password here.

Let’s say you want to copy between the two hosts host_src and host_dest. host_src is a host where you will execute the scp, ssh or rsyn command, regardless of the directory of the file copy!

  • On host_src, run this command as the user running scp / ssh / rsync $ ssh-keygen -t rsa This will require a password. Just press the enter key. It will generate an identity (private key) and an external key. Never share a private key with anyone! ssh-keygen shows where everyone’s key is stored. This is by default ~ / .ssh / id_rsa.pub: Public key is stored in /.ssh/id_rsa.pub
  • Move the id_rsa.pub file to host_dest via either ftp, scp, rsync or other method.
  • On host_dest, login as a remote user which you plan to use when running scp, ssh or rsync on host_src.
  • Copy the contents of id_rsa.pub to ~ / .ssh / authorized_keys

$ cat id_rsa.pub >> ~ / .ssh / authorized_keys $ chmod 700 ~ / .ssh / authorized_keys If this file does not exist, then the above command will create it. Make sure you remove the permission for others to read this file. If it is a public key, why bother preventing others from reading this file? Perhaps the owner of the key has distributed it to a number of trusted users, and it has not yet implemented additional guidelines to verify that it is a trusted user.

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