| Flag | Description | Example |
|---|---|---|
| -i | Use this flag when you want to access a remote server using a private key for authentication. | ssh -i private_key.pem user@hostname |
| -L | Specifies 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 |
| -R | Specifies 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 |
| -D | Enables 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 |
| -N | Use 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'} .