Linux System Engineer: Networking and SSH
1h 53mIntermediate2019-05-01
Authors
Grant McWilliams
Consultant, Speaker, Writer, Professor, Developer
Course details
Study to pass the RHCE—the benchmark certification for Red Hat Enterprise Linux. Watch this course to prepare for the networking and Secure Shell (SSH) topics covered by the exam. Instructor Grant McWilliams provides an overview of Linux networking and key commands and tools for gathering information about your network, including Network Manager's command-line tools nmcli and nmtui. Grant also teaches the iproute2 commands such as ip and nstat, and cross-references them with legacy tools. Learn how to use ip, nmcli, nmtui, netstat, nstat, ss, arp, and dig to get statistics and analyze data, and change live and saved network configuration settings. Grant shows how to create a custom ifcfg-ethx file for manual network configuration and uses systemd to configure the hostname. He then shows how to connect to and configure Secure Shell (SSH), wrapping with a look at SSH security and SSH tips and tricks that will help you optimize SSH and execute commands remotely.
Learning objectives
Gathering network information
Ensuring connectivity with ping
Querying DNS servers with dig
Changing hostname, IP address, and more
Configuring networking
Connecting to SSH
Configuring SSH clients
Authenticating and restricting access with SSH
Optimizing SSH for speed
Learning objectives
Gathering network information
Ensuring connectivity with ping
Querying DNS servers with dig
Changing hostname, IP address, and more
Configuring networking
Connecting to SSH
Configuring SSH clients
Authenticating and restricting access with SSH
Optimizing SSH for speed
Skills covered
RHELRed Hat Enterprise LinuxRed HatLinuxServer AdministrationNetwork AdministrationNetwork and System AdministrationOpen SourceDeep Dive (X:Y)
Concepts
0. Introduction
- 01 - Demystify Linux networking and SSH
- 02 - What you should know
- 03 - OS installation
- 04 - Lab setup
- 05 - Install Guest Additions
1. Linux Networking Overview
- 06 - Consistent network naming with systemd
- 07 - About NetworkManager
2. Gather Network Information
- 08 - Get IP address, subnet mask, and default gateway
- 09 - Get system hostname
- 10 - Get network information from the GUI
3. Use Network Tools
- 11 - Ensure connectivity with ping
- 12 - Get network statistics with ss and ip
- 13 - Analyze ARP table with arp and ip
- 14 - Query DNS servers with dig
4. Change Live Network Configuration
- 15 - Change hostname
- 16 - Change IP address and subnet mask
- 17 - Change the default gateway
- 18 - Change DNS server
5. Change Saved Network Configuration
- 19 - Manual network interface configuration
- 20 - Edit system hosts file
- 21 - Configure networking using Network Manager
- 22 - Configure networking using the GUI
6. Secure Shell Overview
- 23 - SSH overview
- 24 - Installing SSH client and server
- 25 - Connecting to SSH from Windows
- 26 - Connecting to SSH from macOS and Linux
- 27 - Connecting to SSH from Android
- 28 - Connecting to SSH from iOS
7. Configure SSH
- 29 - Configure SSH clients
- 30 - Configure SSH servers
- 31 - SSH per user client files
8. SSH Security
- 32 - Passwordless logins using SSH
- 33 - Restricting root logins with SSH
- 34 - Restricting SSH logins by user and network
9. SSH Tips and Tricks
- 35 - Execute commands remotely using SSH
- 36 - Copy files across the network over SSH
- 37 - Optimize SSH for speed
Conclusion
- 38 - Next steps