Step 1: Create Authentication SSH-Kegen Keys on – (vps1.zetservers.com)
[email@example.com ~]$ ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/home/zetuser/.ssh/id_rsa): [Press enter key] Created directory '/home/zetuser/.ssh'. Enter passphrase (empty for no passphrase): [Press enter key] Enter same passphrase again: [Press enter key] Your identification has been saved in /home/zetuser/.ssh/id_rsa. Your public key has been saved in /home/zetuser/.ssh/id_rsa.pub. The key fingerprint is: 5f:ad:40:00:8a:d1:9b:99:b3:b0:f8:08:99:c3:ed:d3 firstname.lastname@example.org The key's randomart image is: +--[ RSA 2048]----+ | ..oooE.++| | o. o.o | | .. . | | o . . o| | S . . + | | . . . o| | . o o ..| | + + | | +. | +-----------------+
Step 2: Create .ssh Directory on – vps2.zetservers.com
Use SSH from server vps1.zetservers.com to connect server vps2.zetservers.com using zetuser2 as user and create .ssh directory under it, using following command.
[zetuser@zet ~]$ ssh email@example.com mkdir -p .ssh The authenticity of host 'vps2.zetservers.com (vps2.zetservers.com)' can't be established. RSA key fingerprint is 45:0e:28:11:d6:81:62:16:04:3f:db:38:02:la:22:4e. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'vps2.zetservers.com' (ECDSA) to the list of known hosts. firstname.lastname@example.org's password: [Enter Your Password Here]
Step 3: Upload Generated Public Keys to – vps2.zetservers.com
Use SSH from server vps1.zetservers.com and upload new generated public key (id_rsa.pub) on server vps2.zetservers.com under zetuser2‘s .ssh directory as a file name authorized_keys.
[zetuser@zets ~]$ cat .ssh/id_rsa.pub | ssh email@example.com 'cat >> .ssh/authorized_keys' firstname.lastname@example.org's password: [Enter Your Password Here]
Step 4: Set Permissions on – vps2.zetservers.com
Due to different SSH versions on servers, we need to set permissions on .ssh directory and authorized_keys file.
[zetuser@zet ~]$ ssh email@example.com "chmod 700 .ssh; chmod 640 .ssh/authorized_keys" firstname.lastname@example.org's password: [Enter Your Password Here]
Step 5: Login from vps1.zetservers.com to vps2.zetservers.com Server without Password
From now onwards you can log into vps2.zetservers.com as zetuser2 user from server vps1.zetservers.com as zetuser1 user without password.
[zetuser@zet ~]$ ssh email@example.com