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--- ssh_without_a_password_using_public_private_keys [2008/01/30 21:25] – juckins
+++ ssh_without_a_password_using_public_private_keys [2025/06/08 14:51] (current) – juckins
@@ Line 1: / Line 1: @@
-======SSH / rysnc without password======
+==== SSH / rysnc without password ====
-make sure the same versions of ssh are on both machines (open version 3.1+ works best for HP-UX boxes) \\
-need to configure client (machine connecting from) and server (machine connecting to) \\
-on client:  create dsa and rsa public and private keys with the following: \\
-cd to ~/.ssh \\
-ssh-keygen -t rsa -f ~/.ssh/id_rsa \\
-ssh-keygen -t dsa -f ~/.ssh/id_dsa \\
-this creates id_dsa, id_dsa.pub, id_rsa, id_rsa.pub - optionally can enter a 'passphrase' when prompted \\
-on server: \\
+Make sure the same versions of ssh are on both machines. \\
-cd ~/.ssh/ \\
+You need to configure both client (machine connecting from) and server (machine connecting to). \\
-create authorized_keys files
+On client, create ecdsa public and private keys (optionally you can also create rsa and dsa versions) with the following: \\
-copy the id_dsa.pub and id_rsa.pub from client into authorized_keys file \\
+<code>
-make sure permissions 644 on authorized_keys \\
+cd ~/.ssh
+ssh-keygen -t ecdsa -f ~/.ssh/id_ecdsa
+ssh-keygen -t rsa -f ~/.ssh/id_rsa
+ssh-keygen -t dsa -f ~/.ssh/id_dsa
+</code>
+This creates id_ecdsa, id_ecdsa.pub, id_rsa, id_rsa.pub, id_dsa, id_dsa.pub - optionally can enter a 'passphrase' when prompted \\
+From the client, copy the ssh public keys to the server using the following:
+  ssh-copy-id username@remote_host
+Follow the prompts.  If successful you should be able to ''ssh username@remote_host'' without a password now.
+To do this process manually on the server: \\
+<code>
+cd ~/.ssh/
+</code>
+vi authorized_keys \\
+Copy the id_dsa.pub and id_rsa.pub from client into authorized_keys file \\
+Make sure permissions 600 on authorized_keys \\
+Also:
+<code>
+chmod 0700 /home/<user's-home-directory>/.ssh -R
+</code>
 Repeat process for creating keys on server, and copy the .pub keys to the client's ~/.ssh/authorized_keys file. \\
@@ Line 19: / Line 35: @@
 To restart sshd: kill running sshd process \\
-issue the command /sbin/init.d/sshd \\
+now issue:
+<code>/sbin/init.d/sshd
+</code>
-Or for Red Hat systems: service sshd restart \\
+Or for RedHat systems:
+<code>
+service sshd restart
+</code>