Saturday, July 28, 2018

Install and Configure SSH Server on Linux

Update: 3 Aug 2018
We have included additional systemd command and also command to install ssh in Fedora

Install SSH on Ubuntu 


We are using Ubuntu 18.04 LTS Workstation, SSH was not installed by default.  Use the following command to install OpenSSH server:

Update System

We need to update the system before starting to install SSH server. use the command below:

sudo apt-get update

Install OpenSSH Server

To install OpenSSH server use the command below:

sudo apt install -y openssh-server


Install SSH on Fedora

Update System

Before installation, perform a system update first:

sudo dnf update

Install OpenSSH Server

To install OpenSSH server use the command below:

sudo dnf install -y openssh-server


Configure SSH with Systemd

Check SSH Services

To check if ssh daemon is running, use the command:

sudo systemctl status sshd


Starting SSH 

To start the service use the command below:

sudo systemctl start sshd

Configure SSH Server

If we need to change any settings such as port number, use any favorite editor vi, vim or nano with the following command:

sudo nano /etc/ssh/sshd_config

Once the config file is open, make the changes you want. Then we need to restart the service.

Restart SSH Daemon
To restart ssh daemon, use the command:

sudo systemctl restart sshd.service

Check if SSH Server Runs on Boot

To check is SSH daemon runs on boot use the command:

sudo systemctl is-enabled sshd.service 

If it is disabled, we need to enable it so that the daemon will start when system boots up.

Set SSH Daemon to Run on Boot

To enable the daemon so that it start when system boots up, use the command:

sudo systemctl enable sshd.service


Test SSH

To test if the ssh is working, go to a remote workstation and use the following command:

ssh username@serverIpAddress

If you are using different port number please postfix the ip address with :portNumber. We should be able to login to the server.


Reference

For details of configuration please refer to the following guide:


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