SSH

Useage

$ ssh <username>@<host-ip>

Keys

Courtesty of stackexchange

Generating a Key Pair the Proper way

• On Local server

ssh-keygen -t rsa

• On remote Server

ssh root@remote_servers_ip "mkdir -p .ssh"

• Uploading Generated Public Keys to the Remote Server

cat ~/.ssh/id_rsa.pub | ssh root@remote_servers_ip "cat >> ~/.ssh/authorized_keys"

• Set Permissions on Remote server

ssh root@remote_servers_ip "chmod 700 ~/.ssh; chmod 640 ~/.ssh/authorized_keys"

• Login

ssh root@remote_servers_ip

• Enabling SSH Protocol v2

uncomment "Protocol 2" in /etc/ssh/sshd_config

• Enabling public key authorization in sshd

uncomment "PubkeyAuthentication yes" in /etc/ssh/sshd_config

• If StrictModes is set to yes in /etc/ssh/sshd_config then

restorecon -Rv ~/.ssh

If you get "The program 'restorecon' is currently not installed. You can install it by typing"

sudo apt install policycoreutils

...then run that

Over Two ssh Hops

larkinweb

ssh from systemA trough systemB into systemC:

$ ssh -t user1@systemB "ssh user2@systemC"

Mount file system under similar circumstances: