Connect to a Linux EC2 instance in SSH mode from another instance with command line

Pre-requisites

• You must be connected to an existing EC2 instance (call it A) in SSH mode (see Connect to an EC2 instance in SSH mode with PuTTY)
• You must have uploaded your private key file on A and secured it restricting access (see Upload files to a Linux EC2 instance and protect restrict access to yourself using FileZilla)

Step by step

AWS gives you the proper command line, use it !

• On your AWS console, go to EC2 Dashboard -> Instances

• Click the instance you want to reach (call it B)

• Click the Connect button above

• Copy the code example which should look like :

          `ssh -i "myKeyPair2.pem" ec2-user@B_private_IP`
  

• Go to your command line console and paste the code (right click usually)

• Enter !