UNIX System Administration

Course Description

This four-day course introduces Linux and UNIX users to the tasks needed to administer their own system. The course begins with administering user accounts and groups, then moves into file, file system, and disk management. Various archiving commands are shown along with backup strategies. Students will learn about process and job scheduling as well as startup and shutdown procedures. The course finishes with security, system tuning, and networking topics. Generic system administration concepts are covered and related to specific vendors systems
4 days
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Fundamentals of UNIX, and some system administration experience recommended.

Course Introduction

Course Objectives
Course Overview
Using the Workbook
Suggested References

Overview of System Administration

System Administrator Responsibilities
A Brief History of UNIX
Evolving Standards
Navigating the Documentation

User Administration

What is a "user" in UNIX?
The /etc/passwd File
The /etc/group File
Adding Users
Deleting Users
Modifying User Attributes
The Login Process
/etc/profile and .profile
Communicating with Users: /etc/motd
Communicating with Users: The wall Command

File System Basics

The Hierarchy
Device Files
Character and Block Devices
The/dev Directory
Symbolic Links
A File System Tour
The df Command
The du Command
The find Command

Advanced File System Concepts

The Physical File System
The Inode File
File Storage in Disk Blocks
The Superblock
The Free List
Slices and File Systems
File System Types

Disk Management

Making a File System
The mkfs Command
Sharing File Systems
The mount Command
The fstab File
The fsck Command
The lost+found Directory
The prtvtoc Command


Backup Strategies
Backup Tools
The tar Command
The cpio Command
The dump Command
Network Backup Strategies

UNIX Processes

Overview of Processes
Process Space
Process Table
The fork/exec Mechanism
The ps Command
Background Processes
The kill Command
Scheduling Jobs
The cron Daemon
The at Command
The crontab Command
Format of cron Files
Access to Scheduling Facilities

System Startup and Shutdown

Run States
The init Daemon
The inittab Actions
The init Command
The rc Scripts
Single-User Mode
The shutdown Command

UNIX System Security

Security Overview
Physical Security
Account Security
SUID and SGID Settings
File and Directory Permissions
Software Security

Performance Monitoring and Tuning

Performance Issues
Methods of Improving Performance
Swapping and Paging
The sar Utility
Using sar
The truss Command

IP Addressing

Basic Network Needs
Ethernet Addresses
IP Addresses
DNS vs /etc/hosts to Resolve IP
Network Addresses
Network Classes
Broadcast Addresses
Subnet Masks

. Configuring TCP/IP

The /etc/hosts File
The ifconfig Command
The /etc/services File
The inetd Daemon
The /etc/inetd.conf File
Simple TCP/IP Troubleshooting: The ping Command
Simple TCP/IP Troubleshooting: The nestat Command

The LP Print Service

Printing Overview
The lp Command
The lpstat Command
The cancel Command
Adding a Printer
The lpadmin Command
The accept and reject Commands
The enable and disable Commands
Adding a Networked Printer
Other Administrative Commands

UnixUnix AdministrationUnix ScriptingUnix Shell Scripting