OVPN_ssh Key

sudo openvpn --config /home/thanhthu/Abc/gateway-UDP4-4951-thuntt-config.ovpn

https://www.thuysys.com/server-vps/ssh-toan-tap/ssh-keys-authentication-bao-mat-ket-noi-ssh.html
https://www.linode.com/community/questions/65/how-do-i-fix-a-no-route-to-host-error
https://www.tecmint.com/fix-no-route-to-host-ssh-error-in-linux/


ssh -p 2222 root@192.168.10.119 mkdir -p .ssh
cat .ssh/id_rsa.pub | ssh -p 2222 root@192.168.10.119 'cat >> .ssh/authorized_keys'
ssh -p 2222 root@192.168.10.119 'chmod 700 .ssh; chmod 640 .ssh/authorized_keys'
firewall-cmd --zone=public --permanent --add-port=2222/tcp
firewall-cmd --zone=public --permanent --remove-port=22/tcp
firewall-cmd --reload

cat /home/thanhthu/Desktop/manhbt.pub | ssh -p 2222 root@192.168.10.119 'cat >> .ssh/authorized_keys'
/home/thanhthu/Desktop