-iUse this flag when you want to access a remote server using a private key for authentication.ssh -i private_key.pem user@hostname
-LSpecifies local port forwarding. The format is 'local_port:remote_address:remote_port'. This allows traffic on a local port to be forwarded to a remote server.ssh -L 8080:localhost:80 user@hostname
-RSpecifies remote port forwarding. The format is 'port:local_address:local_port'. This forwards traffic from a remote port to a local address and port.ssh -R 8080:localhost:80 user@hostname
-DEnables dynamic port forwarding, creating a SOCKS proxy on localhost. The format is 'local_PORT'. This allows for secure proxying of traffic through SSH.ssh -D 1080 user@hostname
-NUse this flag to prevent execution of a remote command. It is useful when only forwarding ports without executing additional commands on the remote server.ssh -N -L 8080:localhost:80 user@hostname

File Transfer with SSH

Transfer to Remote Server:

scp -i id_rsa [file_name] [username]@[IP]:/.

Transfer from Remote Server to Local Machine:

scp -r [username]@[IP]:{'file_1, file_2'} .