Syntax.Rocks

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Setup SSH and User in Server

Create ssh in the local machine

ssh-keygen -t rsa

• It will generate an .pub(public) and a private key files

Create an ubuntu user

adduser dev

Give super user access to the user

usermod -aG sudo dev
// check group of the user using
id dev

Change it to the new user

sudo su dev

Create SSH folder with the permission rwx- -

mkdir ~/.ssh
chmod 700 ~/.ssh

Create a file with the public key generated

vim authorized_key
// paste the public key previously generated in local machine
// save the file
// change the permission of the file to rw - -
chmod 600 ~/.ssh/authorized_key

Copy the pvt key to the server using ssh-copy-id

ssh-copy-id -i ~/location_to_the_key dev@hostname

Access using the key

ssh -i ~/location_to_the_key dev@hostname
// It will ask for passphrase if you have created during ssh-key-generation

Remove Password Login

sudo vim /etc/ssh/sshd_config
// Change PermitRootLogin no
// Change PasswordAuthenication no

Reload SSHD config

sudo systemctl reload sshd