Is production: true
#migrated

Title: Use public/private key for authentication

Created: 19 Mar 2023 Modified: 19 Mar 2023

Description:



[Legacy Link]

[Link]

Instructions

  1. Generate key file

    #Generate rsa key pair
ssh-keygen -t rsa

#Or generate rsa with specific bit "-t" option
ssh-keygen -b 8192 -t rsa

  2. Copy public file to the server aimed to connect through ssh

    scp -P{port} ~/.ssh/id_rsa.pub {user1}@{host1}:~

#ssh to host1
ssh -P{port} {user1}@{host1}

#make directory if not exists
mkdir ~/.ssh

#make file is not exists
cat ~/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

#exit ssh session

  3. Test the connection

    ssh -i ~/.ssh/id_rsa {user1}@{host1}

  4. Disable password authentication

    sudo vim /etc/ssh/sshd_config
#########################
#change from yes to no
PasswordAuthentication no
#########################
sudo systemctl restart sshd.service