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SCP, also known as 安全拷贝, is a command line utility used to transfer files and directories from local to remote system and vice versa. It also allows us to transfer files and directories between two remote systems. During the transfer, files and passwords are encrypted, so it is a more secure way of transfer.

SCPOrder

grammar

scp [OPTION] [user@]SRC_HOST:]file1 [user@]DEST_HOST:]file2

Logo

• OPTION: It represents scpoptions like password, ssh configuration, ssh port, limit, recursive copy… etc.
• [user@]SRC_HOST:]file1: The source file or directory to be copied.
• [user@]DEST_HOST:]file2: The directory path where the source file or directory needs to be copied.

scpVarious options are provided to control the transfer. Some of the most widely used options are:

scpThings to note when using the command

scpMethods for transferring files and directories using

Copy files from local system to remote system

scp main.py remote_username@11.11.0.200:/Documents/directory

This command will prompt us to enter the user password, and the transfer will start after entering the correct password.

Output:

remote_username@11.11.0.200's password:
main.py                             100%    0     0.0KB/s   00:00

Copies the file in the local system main.pyto the remote server with username remote_usernameand IP address 11.11.0.200. /Documents/directoryIndicates the target directory on the remote server where the file needs to be copied. If no remote directory is specified, the file will be copied to the home directory of the remote machine.

If the remote SSHlistening port is not the default 22port, we can use -Pthe option to specify the port.

scp -P 8080 main.py remote_username@11.11.0.200:/Documents/directory

Copy a directory from the local system to the remote system

We have to use -rthe -p parameter with scpthe -d command to transfer a directory, which stands for recursive transfer of all the files within the directory.

scp -r /Documents/myapp remote_username@11.11.0.200:/Documents/remote_app

DocumentsIt copies the directory inside the directory on the local machine myappto Documentsthe directory inside the remote machine remote_app.

Copy files from a remote system to a local system

To copy a file from a remote system to a local system, we use the remote location as the source and the local location as the destination.

scp remote_username@11.11.0.200:/remote/main.py /Documents/local

It copies the file main.py from the remote system to the local system to the destination directory /Documents/local.

Copy files from one remote location to another remote location

scp userA@11.11.0.200:/host1/main.py userB@11.11.0.205:/host2

It copies 11.11.0.200the file on the remote host at IP address to a directory on the host at IP address ./host1/main.py11.11.0.205host2

To route traffic through the machine issuing the command, we scpinclude -3the -r option in the command.

scp -3 userA@11.11.0.200:/host1/main.py userB@11.11.0.205:/host2