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3 Cards in this Set
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scp |
This tool is used to copy data to or from a remote host over SSH. Because it uses SSH, data you send to an off-site backup will be encrypted in transit, protecting its confidentiality. Like SSH, scp uses TCP port 22 by default. The following is an example of copying a file to a remote host: scp file.txt user@host:/home/dir |
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sftp |
This command is the implementation of the Secure File Transport Protocol (SFTP). SFTP uses SSH tunnel as a transportation mechanism to encrypt data. Whereas scp is used purely for transferring files, sftp can transfer files and manage files and directories. So, you can list, create, and remove directories on the remote system. The sftp command also supports resuming file transfers, whereas scp does not. Just like with the standard ftp command, you can use sftp interactively or non-interactively. For example, to retrieve a file non-interactively: sftp user@host:file.txt |
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rsync |
This tool is used to copy files locally and to remote systems. It’s real power lies in its efficient use of network bandwidth; instead of copying all files, it only copies differences between files. So, if you use rsync on all files in a directory, it will check the destination directory to see if those exact files already exist. Only files that aren’t already in the destination will be copied. The rsync command can copy files over SSH, or it can use the rsync daemon if you set it up on the remote system. The following is an example of synchronizing the files in a local directory to a remote directory over SSH: rsync -a /home/mydir/ user@host:/home/mydir/ |
