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Ubuntu Server - Post-Install Setup logo

Some setup processes to get Ubuntu 14 or 16 ready to use after initial install

Ubuntu Server download is available from: https://www.ubuntu.com/download/server

NMTUI Network Setup (Recommended)

NMTUI (Network Manager Text User Interface) is an easy to use GUI which makes it easy to set up your networking. You must have internet access to install it.

  1. Install Network Manager

     sudo apt install network-manager

  2. Enable the Network Managers service for startup and start the service

     sudo systemctl enable NetworkManager
 sudo systemctl start NetworkManager

  3. Use sudo vi /etc/netplan/50-cloud-init.yaml to make the file look like:

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    version: 2
    renderer: NetworkManager
  1. Use sudo vi /etc/NetworkManager/NetworkManager.conf to make the file look like:
[main]
plugins=ifupdown,keyfile

[keyfile]
unmanaged-devices=*,except:type:ethernet

[ifupdown]
managed=false

[device]
wifi.scan-rand-mac-address=no

  1. Restart the server with sudo shutdown -r now

  2. Once back up, run the network manager with nmtui

  3. Edit your network settings and make sure to deactivate/activate the interface if you are on the console. If not on the console, reboot the server to have settings take effect

  4. Use ip addr to check that your settings took effect

Manual Network Setup

If you didn't setup the network adapters during the initial install (like CentOS does), we have to login (using non-root user) to the KVM and set up the network as the first thing

  1. Open the 'interfaces' file for editing

     sudo nano /etc/network/interfaces

  2. Modify and enter the information below based on the adapters listed already in the file and the IP info you need to assign

     auto eth0
 iface eth0 inet static
         address 192.168.1.100
         netmask 255.255.255.0
         gateway 192.168.1.1
         dns-nameservers 8.8.8.8
 iface eth0 inet6 static
         address 2001:db8:1ce:1ce:babe::100/64
         gateway 2001:db8:1ce:1ce:babe::1
         dns-nameservers 2001:4860:4860::8888 2001:4860:4860::8844

  3. Hit CTRL-O and then ENTER to save the file

  4. Hit CTRL-X to exit the Nano editor

  5. UBUNTU 14: Restart the networking stack to effect changes

     sudo ifdown eth0
 sudo ifup eth0

  6. UBUNTU 16: Restart the networking stack to effect changes

     sudo /etc/init.d/networking restart

  7. Check that the IP settings took

     ip addr

  8. Ping something to check connectivity

     ping 8.8.8.8

Enable Root User

Ubuntu has the root user disabled by default and requires you to log in with a user created during the install process. Sometimes we need to enable the root account

  1. Set the password for the root account

     sudo passwd root

  2. Unlock the root account

     sudo passwd -u root

  3. UBUNTU 14: Enable SSH login as root user (optional)

     sudo sed -i --follow-symlinks 's/PermitRootLogin without-password/PermitRootLogin yes/g' /etc/ssh/sshd_config

 sudo service ssh restart

  4. UBUNTU 16: Enable SSH login as root user (optional)

     sudo sed -i --follow-symlinks 's/PermitRootLogin prohibit-password/PermitRootLogin yes/g' /etc/ssh/sshd_config

 sudo service ssh restart

Update the OS

You may have selected some level of automatic updates during the install, but it is always a good idea to update your OS with the latest patches when you build it

  1. Check repos for available updates

     sudo apt update -y

  2. Install available updates

     sudo apt upgrade -y

Install Useful Packages

These are some packages I install on almost everything

  1. UBUNTU 16: Python 2.X is something you will likely need

     sudo apt install python-minimal -y

  2. Open VM Tools is an open version of the VMWare Tools app. Useful if on a hypervisor

     sudo apt install open-vm-tools -y

  3. A GIT client is a necessity if using a GIT repo

     sudo apt install git -y

Connect to SCP Share

We can use SSHFS to connect to another Linux box file system

  1. Install the SSHFS package

     sudo apt install sshfs -y

  2. Mount the local /mnt/ directory to a remote Linux machine

     sshfs [email protected]:/root /mnt