You can securely copy files or directories between remote hosts and local machine. The scp command transfer data using SSH, so it needs a password or passphrase for authentication. To transfer files to an EC2 instance without using a password, you can use SSH key pairs for authentication.

SCP or Secure Copy Protocol is an SSH-based protocol that permits sharing of files between remote devices. SCP allows you to send and receive file from and to a local device or between remote devices.

SCP command help us copies files, directories between hosts on network. If you could not found command we need to install openssl client package.

Rsync and SCP protocol connection between machines for copying files over network.

You may get an error like below, when you are transferring data from one system to another system using scp