The SCP ( Secure Copy Protocol ) is a network protocol, based on the BSD RCP protocol, which supports file transfers between hosts on a network. SCP uses Secure Shell (SSH) for data transfer and uses the same mechanisms for authentication.
Using SCP you can copy file/directory :
While transferring data using SCP, files and password is encrypted, so that anyone snooping on the traffic doesn’t get anything sensitive.
Things to keep in mind before the start -
The syntax for the scp command is:
scp [options] username@source_host:directory/filename /where/to/put
In the below examples I Recursively copying entire directories -
From remote to local -
scp -r username@ipaddress:/directory/to/send /local/where/to/put
From local to remote -
scp -r /local/directory/to/send username@ipaddress:/where/to/put
Copying between two remote hosts -
scp -r username@ipaddress1:/file/to/send username@ipaddress2:/where/to/put
You can use scp with the following options according to your requirements.
scp –P port : Generally 22 as a default port of scp. You can also specify a specific port. scp –p : An estimated time and the connection speed will appear on the screen. scp –q : Disable progress meter and warning. scp –r : Recursively copy entire directories. scp –v : Print debug information into the screen. It can help you debugging connection, authentication and configuration problems. scp -c : By default SCP using “AES-128” to encrypt files. If you want to change to another cipher to encrypt it, you can use “-c”.
I hope that you now have understood how to make the best use of scp command to securely transfer files between the systems.
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