CentOS SSH Installation And Configuration

Secure Shell (SSH) is a network protocol that allows you to securely connect to a remote computer and execute commands. SSH is commonly used to remotely manage servers and other network devices.

To install and configure SSH on a CentOS system, follow these steps:

1. Install the SSH server. SSH is not installed by default on CentOS systems. To install it, use your package manager. For example, you can use the following command:

sudo yum install openssh-server

This will install the OpenSSH server, which is a popular implementation of SSH.

2. Start the SSH server. Once the installation is complete, start the SSH server using the following command:

sudo systemctl start ssh

3. Enable the SSH server at boot. To make the SSH server start automatically when the system boots, you can enable it as a service. To do this, use the following command:

sudo systemctl enable ssh

4. Configure the SSH server. The SSH server is configured using the file /etc/ssh/sshd_config. You can edit this file to change the default configuration of the SSH server. For example, you can specify which users are allowed to connect via SSH, or change the default port that the server listens on.

5. Test the SSH connection. Once the SSH server is running and configured, you can test the connection from a client machine. To do this, use the ssh command and specify the IP address or hostname of the server and the username of the account you want to log in as. For example:

ssh user@server_ip_or_hostname

If the connection is successful, you will be prompted for the password of the user account and then be logged in to the server.