Contents 1 SSH Installation 2 Test the SSH service 3 SSH Management 4 Configuration Files 5 Enable Root Access

SSH Installation

Logon to the ubuntu server and open the terminal when you are using the graphical user interface. Type the following commands to install the OpenSSH client and server.

sudo apt-get install openssh-server openssh-client

Test the SSH service

Type the following command to test the openssh-server: 

shh user@localhost

The system will prompt for an message to accept the public key. This key is used for the RSA authentication. Accept the public key en authenticate with the OpenSSH server.

SSH Management

Type the following command to start/stop/restart the SSH server:

Start SSH Server

sudo service ssh start

Stop SSH Server

sudo service ssh stop

Restart SSH Server

sudo service ssh restart

When this command returns in an error then navigate to the path /etc/init.d

Type the following command to start the SSH server:

Start SSH Server

ssh start

Stop SSH Server

ssh stop

Restart SSH Server

ssh restart

Configuration Files

The configuration files are located in:

/etc/ssh/

Use ssh_config to edit your own ssh client settings and use sshd_config to edit the openssh server settings.

Enable Root Access

By default root access is disabled. To enable root access the following configuration file needs to be edited:

/etc/ssh/sshd_config

To edit with the nano editor use the following command, do not forget the sudo command because else you do NOT have permission to save the config.

sudo nano /etc/ssh/sshd_config

Change the following rule:

PermitRootLogin: No    <– change it to –>     PermitRootLogin : Yes

Press CTRL + O to save the changes and restart the SSH server

Date of last update: 5-28-10

Author: Peter Hooghuis