Linux System Administration (LFS307)

After completing this course, students will be able to:

• Administer, configure and upgrade Linux systems running one of the three major Linux distribution families: Debian/Ubuntu andRed Hat/CentOS/Fedora, how to master the tools and concepts you’ll need to efficiently build and manage an enterprise Linux infrastructure, how to work with Git and perform essential collaborative tasks, how to use state-of-the-art system administration techniques in real-life scenarios via practical labs, and more.

This course is designed for individuals who desire to gain the necessary skills and abilities to work as a professional Linux system administrator. Students should have basic knowledge of Linux and its most common utilities and text editors.
 

Introduction

• Linux Foundation
• Linux Foundation Training
• Linux Foundation Certifications
• Linux Foundation Digital Badges
• Laboratory Exercises, Solutions and Resources
• Things Change in Linux and Open Source Projects
• E-Learning Course: LF207
• Distribution Details
• Labs

Linux Filesystem Tree Layout

• One Big Filesystem
• Data Distinctions
• FHS Linux Standard Directory Tree
• root (/) directory
• /bin
• /boot
• /dev
• /etc
• /home
• /lib and /lib64
• /media
• /mnt
• /opt
• /proc
• /sys
• /root
• /sbin
• /srv
• /tmp
• /usr
• /var
• /run
• Labs

User Environment

• Environment Variables
• Key Shortcuts
• Command History
• Command Aliases
• Labs

User Account Management

• User Accounts
• Shell Startup Files
• Management of User Accounts
• Locked Accounts
• Passwords
• /etc/shadow
• Password Management
• Password Aging
• The root Account
• SSH
• Labs

Group Management

• Groups
• Group Membership
• Group Management
• User Private Groups
• Labs

File Permissions and Ownership

• File Permissions and Ownership
• File Access Rights
• chmod, chown and chgrp
• umask
• Filesystem ACLs
• Labs

Package Management Systems

• Why Use Packages?
• Software Packaging Concepts
• Package Types
• Available Package Management Systems
• Packaging Tool Levels and Varieties
• Package Sources
• Creating Software Packages
• Revision Control Systems
• Available Source Control Systems
• The Linux Kernel and git
• Labs

dpkg

• DPKG (Debian Package)
• Package File Names and Source
• DPKG Queries
• Installing/Upgrading/Uninstalling
• Labs

APT

• APT
• APT Utilities
• Queries
• Installing/Removing/Upgrading Packages
• Cleaning Up
• Labs

RPM

• RPM (Red Hat Package Manager
• Package File Names
• RPM Database and Helper Programs
• Queries
• Verifying Packages
• Installing and Removing Packages
• Updating, Upgrading and Freshening RPM Packages
• Upgrading the Linux Kernel
• rpm2archive and rpm2cpio
• Labs

dnf and yum

• dnf
• yum
• Queries
• Installing/Removing/Upgrading Packages
• Additional dnf Commands
• Labs

zypper

• zypper
• Queries
• Installing/Removing/Upgrading Packages
• Additional zypper Commands
• Labs

Introduction to GIT

• Revision Control
• Know Where the Code is Coming From: DCO and CLA
• Available Revision Control Systems
• Graphical Interfaces
• Documentation
• Labs

Using Git: an Example

• Basic Commands
• A Simple Example
• Signing Off on Commits
• master vs main
• Labs

Processes

• Programs and Processes
• Process Limits
• Creating Processes
• Process Control
• Starting Processes in the Future
• Process States
• Execution Modes
• Daemons
• niceness
• Labs

Process Monitoring

• Process Monitoring
• Troubleshooting
• ps
• pstree
• top
• Labs

Memory Monitoring, Usage and Configuring Swap

• Memory Monitoring and Tuning
• /proc/sys/vm
• vmstat
• Swap
• Out of Memory Killer (OOM)
• Labs

I/O Monitoring and Tuning

• I/O Monitoring
• iostat
• iotop
• Labs

Virtualization Overview

• Introduction to Virtualization
• Hosts and Guests
• Emulation
• Hypervisors
• libvirt
• QEMU
• KVM
• Labs

Containers Overview

• Containers
• Application Virtualization
• Containers vs Virtual Machines
• Docker
• Docker Commands
• Podman
• Labs

Linux Filesystems and the VFS

• Filesystem Basics
• Filesystem Concepts
• Virtual Filesystem (VFS)
• Available Filesystems
• Journalling Filesystems
• Special Filesystems
• Labs

Disk Partitioning

• Common Disk Types
• Disk Geometry
• Partitioning
• Partition Tables
• Naming Disk Devices
• blkid and lsblk
• Sizing up partitions
• Backing Up and Restoring Partition Tables
• Partition table editors
• fdisk
• Labs

Filesystem Features: Attributes, Creating, Checking, Usage, Mounting

• Extended Attributes
• Creating and formatting filesystems
• Troubleshooting Filesystems
• Checking and Repairing Filesystems
• Filesystem Usage
• Disk Usage
• Mounting filesystems
• NFS
• Mounting at Boot and /etc/fstab
• automount
• Network Block Devices
• Labs

The Ext4 Filesystems

• ext4 Features
• ext4 Layout and Superblock and Block Groups
• dumpe2fs
• tune2fs
• Labs

Logical Volume Management (LVM)

• Logical Volume Management (LVM)
• Volumes and Volume Groups
• Working with Logical Volumes
• Resizing Logical Volumes
• LVM Snapshots **
• Labs

Kernel Services and Configuration

• Kernel Overview
• Kernel Boot Parameters
• Kernel Command Line
• Boot Process Failures
• sysctl
• Labs

Kernel Modules

• Kernel Modules
• Module Utilities
• modinfo
• Module Configuration
• Labs

Devices and udev

• udev and Device Management
• Device Nodes
• Rules
• Labs

Network Addresses

• IP Addresses
• IPv4 Address Types
• IPv6 Address Types
• IP Address Classes
• Netmasks
• Hostnames
• NTP
• Labs

Network Devices and Configuration

• Network Devices
• ip
• ifconfig
• Predictable Network Interface Device Names
• Network Configuration Files
• Network Manager
• Routing
• Virtual Network Interfaces
• DNS and Name Resolution
• Network Troubleshooting
• Network Diagnostics
• Labs

LDAP

• LDAP Authentication
• Labs

Firewalls

• Firewalls
• Interfaces
• firewalld
• Zones
• Source Management
• Service and Port Management
• Port Redirection
• Labs

System Init: systemd, SystemV and Upstart

• The init Process
• Startup Alternatives
• systemd
• systemctl
• Labs

Backup and Recovery Methods

• Backup Basics
• Backup vs Archive
• Backup Methods and Strategies
• tar
• Compression: gzip, bzip2 and xz and Backups
• dd
• rsync
• Backup Programs **
• Labs

Linux Security Modules

• Linux Security Modules
• SELinux
• AppArmor
• Labs

System Rescue

• Rescue Media and Troubleshooting
• Using Rescue/Recovery Media
• System Rescue and Recovery
• Emergency Boot Media
• Using Rescue Media
• Emergency Mode
• Single User Mode
• Labs

Closing and Evaluation Survey

• Evaluation Survey