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How to Restrict SSH Access to Certain Users in Linux

OpenSSH (Secure Shell) is a standard connectivity program for logging into a remote machine using the SSH protocol for executing commands on the remote machine. It encrypts all network traffic between client and server to eradicate eavesdropping, connection hijacking, and other attacks.

Link to Article:
https://www.linuxshelltips.com/restrict-ssh-access-user/