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Check How to use SCP command in Linux
SCP is an acronym for Secure Copy Protocol. It is a command line utility that allows the user to securely copy files and directories between two locations, usually between Unix or Linux systems. The protocol ensures that file transfers are encrypted to prevent anyone with suspicious intentions from obtaining sensitive information. In simpler terms, we can say that SCP is a safer option for the cp (copy) command. It is also important to know that SCP uses encryption over an SSH (Secure Shell) connection, which ensures that transferred data is protected from suspicious attacks. In this article, we will show you how to use the SCP command in Linux.
How to use the SCP command in Linux
SCP files to a destination server
- The following example copies a ~/app directory path from the source host to a destination host at 10.0.0.24. The SSH connection uses the private key lab_id_rsa for authentication.
- scp -I ~/.ssh/lab_id_rsa ~/app 10.0.0.24:/opt/app
SCP Multiple files to a destination server
- In the following example, multiple directories from the source host are copied to the remote host. The directories are copied to the /opt/backups directory on the destination host.
- scp ~/app1 ~/app2 ~/app3 10.0.0.24:/opt
SCP only over IPv4
- In this example, we force the scp command to use IPv4 addresses only to copy files between two hosts.
- scp -4 ~/app1 ~/app2 ~/app3 10.0.0.24:/opt
SCP only over IPv6
- Since IPv6 is becoming even more common in enterprise organizations and the Internet, you may want to force IPv6 only when using the scp command.
- scp -6 ~/app1 ~/app2 ~/app3 10.0.0.24:/opt
SCP batch mode to suppress passwords
- When copying data between two hosts using the scp command in a script file or automated workflow, any password or passphrase prompts should be suppressed. The scp command has a -B flag that forces requests to be ignored.
- To use scp batch mode, the remote user must not have a password, which is strongly discouraged, or must use SSH public/private key pairs for authentication.
- scp -i ~/.ssh/backup_id_rsa ~/backup/files 10.0.0.4:/opt/backups
Final words: How to use SCP command in Linux
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