Machine Setup

1. Install Ubuntu or Debian - prefer the server version of your chosen Ubuntu or Debian LTS distro

2. Change root password

   cslab@machine:~$ sudo su
   root@machine:~# passwd
   

3. Remove swap

   root@machine:~# swapoff -a
   root@machine:~# rm -v /swap.img
   

4. Connect the NFS (nemesis is down (3.3), comment it out)

   root@machine:~# vim /etc/fstab: 
   		# swap -> comment-out
   		147.102.4.1:/home	/home	nfs	defaults	0	0
   		147.102.4.1:/various	/various	nfs	defaults,nolock	0	0
   		#147.102.3.3:/store/cluster_data	/risky_store	nfs	nfsvers=3,nolock	0	0
   

5. Determine users, passwords, groups

   root@machine:~# vim /etc/nsswitch.conf
   		at passwd, group, shadow add: files nis
   

6. Test if the previous step was successful

   root@machine:~# yptest (must read the config)
   root@machine:~# id ypap (must return user)
   root@machine:~# ps -ef | grep yp (ypbind.service must be running)
   

   If not running:

   root@machine:~# systemctl restart ypbind
   root@machine:~# systemctl list-unit-files | grep yp
   

7. Root users enter without password

   root@machine:~# vim /etc/ssh/sshd_config
                   PasswordAuthentication no
   

8. Connection fix

   root@machine:~# vim /lib/systemd/system/systemd-{logind, udevd}.service # comment-out IPAddressDeny=any
   root@machine:~# systemctl daemon-reload
   root@machine:~# systemctl restart systemctl-logind
   root@machine:~# systemctl restart systemctl-udevd