Installing OpenSSH on CentOS 8

OpenSSH is an open-source implementation of the SSH protocol suite, which allows secure remote login, remote file transfer, and secure tunneling capabilities. This protocol suite provides a secure and encrypted communication channel between two networked devices, enabling secure remote administration and secure file transfer.

To install OpenSSH on CentOS 8, follow the steps below:

1. Open a terminal session on your CentOS 8 machine.
2. Update your system's package repositories by running the following command:

   sudo dnf update

3. Install the OpenSSH server package by running the following command:

   sudo dnf install openssh-server

4. Once the installation is complete, start the OpenSSH service by running the following command:

   sudo systemctl start sshd

5. To enable the OpenSSH service to start automatically at boot, run the following command:

   sudo systemctl enable sshd

6. By default, the SSH service listens on port 22. If you need to modify the SSH port, you can edit the configuration file "/etc/ssh/sshd_config". Make sure to update the port value and save the changes.
7. You can now connect to your CentOS 8 machine using an SSH client. Make sure you have an SSH client installed on your local machine.

With OpenSSH installed and properly configured, you can now securely connect to your CentOS 8 machine remotely, transfer files securely, and even create secure tunnels for other applications.