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Copying files between different hosts under Linux

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This is a guide on how to copy files between different Linux hosts using the scp command. It provides examples of copying files from the local host to a target host, from a target host to the local host, and even from one target host to another. It also mentions that if copying a folder, the -r option should be added. Additionally, it explains that if the SSH ports are different or have restrictions, the -P option should be used to specify the port.

Copying Files Between Different Hosts on Linux#

Prerequisites#

The two target hosts for file copying should be able to communicate. The local end should have scp.

SCP Command#

Command format: scp [source file path] [destination file path]

Usage:

usage: scp [-346BCpqrTv] [-c cipher] [-F ssh_config] [-i identity_file]
            [-J destination] [-l limit] [-o ssh_option] [-P port]
            [-S program] source ... target

1. Copying files from the local end to the destination end#

scp /root/a [email protected]:/root/b

Here, "a" and "b" are the file names, which can be different.

2. Copying files from the destination end to the local end#

scp [email protected]:/root/a /root/b

3. Note#

If you want to copy a folder, add -r after scp.

Since scp is based on the ssh port, it transfers files using the default local port to the remote port. If the ssh ports on both ends are different or there are port restrictions, you need to specify them again by adding -P after the scp command. The "P" must be capitalized. Refer to the scp usage.

4. Unusual Usage#

Can you copy files from a remote end to another remote end? Yes, you can.

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