Linux for Administrators

Hardware Discovery Tools

Configuring New Hardware with hwinfo

Hardware and System Clock

Console

Virtual Terminals

Serial Ports

SCSI Devices

USB Devices

USB Configuration

Common UNIX Printing System

Defining a Printer

Managing Optical Media

Tape Libraries

Managing Linux Device Files

Kernel Hardware Info - /sys/

/sys/ Structure

udev

Kernel Modules

Configuring Kernel Components and Modules

Handling Module Dependencies

Configuring the Kernel via /proc/

Booting Linux on PCs

GRUB Configuration

Boot Parameters

Initial ramdisk

/sbin/init

System Init Styles

Linux Runlevels

/etc/inittab

/etc/rc.d/rc.sysinit

SUSE /etc/init.d/boot

Runlevel Implementation

System Configuration Files

RHEL6 Configuration Utilities

SLES11 Configuration Utilities

Typical SysV Init Script

The /etc/rc.local File

The /etc/init.d/*.local Files

Managing Daemons

Controlling Service Startup

Shutdown and Reboot

​Managing Software

RPM Features

RPM Architecture

RPM Package Files

Working with RPMs

Querying and Verifying with rpm

Updating the Kernel RPM

Dealing with RPM & YUM Digest Changes

YUM Plugins

YUM Repositories

Compiling/Installing from Source

Manually Installed Shared Libraries

Installing Source RPM Packages

Partitioning Disks with fdisk

Partitioning Disks with parted

File system Creation

Mounting File system file systems

File system Maintenance

Persistent Block Devices

Resizing File system file systems

Swap

File system Structures

Determining Disk Usage With df and du

Configuring Disk Quotas

Setting Quotas

Viewing and Monitoring Quotas

File system Attributes

Backup Software

Logical Volume Management

Implementing LVM

Creating Logical Volumes

Manipulating VGs & LVs

Advanced LVM Concepts

system-config-lvm

SLES Graphical Disk Tool

RAID Concepts

Array Creation with mdadm

Software RAID Monitoring

Software RAID Control and Display

Remote Storage Overview

Remote File system file system Protocols

Remote Block Device Protocols

File Sharing via NFS

NFSv4

NFS Clients

NFS Server Configuration

Implementing NFSv4

AutoFS

AutoFS Configuration

Accessing Windows/Samba Shares from

Linux

SAN Multipathing

Multipath Configuration

Multipathing Best Practices

iSCSI Architecture

Open-iSCSI Initiator Implementation

iSCSI Initiator Discovery

iSCSI Initiator Node Administration

Mounting iSCSI Targets at Boot

iSCSI Multipathing Considerations

User and Group Concepts

User Administration

Modifying Accounts

Group Administration

Password Aging

Default User Files

Controlling Logins

Manual DS Client Configuration

system-config-authentication

SLES Graphical DS Client

Configuration

System Security Services

Daemon (SSSD)

Modules (PAM)

PAM Overview

PAM Module Types

PAM Order of Processing

PAM Control Statements

PAM Modules

pam_unix

pam_nologin.so

pam_limits.so

pam_wheel.so

pam_xauth.so

Security Concepts

Tightening Default Security

SuSE Security Checker

Security Advisories

File Access Control Lists

Manipulating FACLs

Viewing FACLs

Backing Up FACLs

File Creation Permissions with umask Daemon

User Private Group Scheme

Alternatives to UPG

AppArmor

SELinux Security Framework

SELinux Modes

SELinux Commands

Choosing an SELinux Policy

SELinux Booleans

Permissive Domains

SELinux Policy Tools

Basic Firewall Activation

IPv4 Fundamentals

TCP/UDP Fundamentals

Linux Network Interfaces

Ethernet Hardware Tools

Network Configuration with ip Command

Configuring Routing Tables

IP to MAC Address Mapping with ARP

Starting and Stopping Interfaces

NetworkManager

DNS Clients

DHCP Clients

system-config-network{tui,cmd}

SUSE YaST Network Configuration Tool [covered if using SUSE]

Network Diagnostics

Information from netstat and ss

Managing Network-Wide Time

Continual Time Sync with NTP

Configuring NTP Clients

Useful NTP Commands

Multiple IP Addresses

Configuring a DHCP server

Enabling IPv6

Interface Bonding

Interface Bridging

802.1q VLANS

Tuning Kernel Network Settings

System Logging

Syslog-ng

Rsyslog

/etc/rsyslog.conf

Log Management

Log Anomaly Detector

System Status - Memory

System Status - I/O

System Status - CPU

Performance Trending with sar

Troubleshooting Basics: The Process

Troubleshooting Basics: The Tools

strace and ltrace

Common Problems

Troubleshooting Incorrect File Permissions

Inability to Boot

Typos in Configuration Files

CorruptFile system file systems

RHEL Rescue Environment [covered if using RHEL]

SUSE Rescue Environment [covered if using SUSE]