Lesson 5

Dates: 2/20/2019

Linux networking

Linux System Administration

Linux network configuration on Ubuntu 18.04 LTS

On Ubuntu 18.04 LTS, configuration in /etc/network/interfaces no longer works.

NetPlan defines the network service renderer and configuration.

File /etc/netplan/*.yaml contains the main configuration for Ubuntu network interfaces.

For example, /etc/netplan/01-netcfg.yaml on kvm-18.04 VM contains settings for DHCP client:

network:
  version: 2
  renderer: networkd
  ethernets:
    ens3:
      dhcp4: yes

Netplan supports two types of the network renderers (services):
networkd, default for server installation
and
NetworkManager, default for desktop installation

Computers on a Network
TCP/IP protocol
OSI model
TCP/IP stack and Kernel
Packet Encapsulation
Hosts communication via TCP/IP
(Exercise)NIC naming
Network Layer Protocol
Subnet Mask
Network/Subnet splitting
Subnet Calculation
(Exercises) ipcalc
Packet Routing
Non-routable subnets and NAT
The loopback device
Transport Layer Protocols
TCP and UDP ports
Netplan on 18.04 LTS
(Exercise) Netplan NIC settings
NetworkManager
(Exercise) NIC settings with NetworkManager
(Exercises) NIC name setting
(Exercises) Linux Network Settings
(Exercises) ICMP protocol
Network Applications
Name Resolution
(Exercises) network services
References
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