Lab user and ssh - acavataio/ITC-136 GitHub Wiki

First, install SSH on your build:
Open a console windows and become SUDO by entering 'sudo su'
now,
apt-get install vim
apt-get install openssh-server

now create a copy of the sshd_config and modify sshd_config for the new users:
cd /etc/ssh
ls -ltra
cp sshd_config sshd_config.orig
vim sshd_config

The change you will make is to uncomment line 52:
#PasswordAuthentication yes

so that it becomes
PasswordAuthentication yes

Now, save the document and then merge the copy with the original:
pwd
ls -l
diff sshd_config sshd_config.orig

Now, restart the sshd service:
systemctl restart sshd

Second, add users:
Use the adduser command to add a new user to system.
adduser username

Set and confirm the new user's password at the prompt.
A strong password is highly recommended!

Set password prompts:
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully

Follow the prompts to set the new user's information. It is fine to accept the defaults to leave all of this information blank.

Use the usermod command to add the user to the sudo group.

usermod -aG sudo username

By default, on Ubuntu, members of the sudo group have sudo privileges.

Test sudo access on new user account
Use the su command to switch to the new user account.

su - username

As the new user, verify that you can use sudo by prepending "sudo" to the command that you want to run with superuser privileges.

sudo command_to_run
For example, you can list the contents of the /root directory, which is normally only accessible to the root user.

sudo ls -la /root

The first time you use sudo in a session, you will be prompted for the password of the user account. Enter the password to proceed.

Third, check to see the IP of the machine you are currently logged into:
/sbin/ifconfig

Fourth, Connect to the remote machine via SSH:
from the command line
ssh (username)@(ipaddress of remote)
from putty

Fifth, check IP of the machine that you are logged into to verify.
/sbin/ifconfig

For example, here is a screenshot of me connecting to SSH on Joe's computer: