SSH stands for Secure Shell. It is a cryptographic network protocol used for securely operating network services over an unsecured network. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server.
Common Uses of SSH:
·
Remote Login: SSH is commonly
used to log into a remote machine and execute commands.
·
File Transfers: SSH can be used
to securely transfer files using protocols like SCP (Secure Copy Protocol) or
SFTP (SSH File Transfer Protocol).
·
Tunneling: SSH can be used to
create secure tunnels for other protocols, such as forwarding a local port to a
remote server.
·
Automated Processes: SSH is
often used in scripts and automated processes to securely connect to remote
servers.
How SSH
Works:
1.
Connection Establishment: The SSH
client initiates a connection to the SSH server.
2.
Key Exchange: The client and server
agree on encryption protocols and exchange keys to establish a secure
connection.
3.
Authentication: The client
authenticates itself to the server using one of several methods (e.g.,
password, public key).
4.
Session: Once authenticated, the
client and server can securely communicate, allowing the client to execute
commands, transfer files, or forward ports.
This command will prompt you for the password associated with the
username on the remote_host.