This page contains help on SSH setup in Linux
Command to create ssh key (public and private) and store it in .ssh directory in user's home directory
ssh-keygen
Command to copy the public ssh key to remote ssh server for remote access
cat <public_key_file> | ssh <user>@<server_ip> "cat >> ~/.ssh/authorized_keys"
Command to connect to remote server using SSH
ssh user@server_ip_or_domain
Command to add a private key to ssh-agent
ssh-add <path-to-private-key-file>