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CL030 - LINUX System Administration

Course Description: Learn and practice essential Linux system administration tasks. This course is not specific to a particular Linux distribution and presents information about using Linux in a commercial environment.

Audience: System Administrators who want to gain practical, hands-on Linux administration training.

Prerequisites: Linux Fundamentals, installation, configuration, and some system administration experience recommended.

Course Contents

Overview of System Administration

  • A System Administrator's Responsibilities
  • A Brief History of UNIX
  • Linux
  • Linux Distributions
  • Navigating the Documentation
  • User Administration

  • What is a "user" in Linux?
  • The /etc/passwd File
  • Groups
  • The /etc/group File
  • Passwords
  • The /etc/shadow File
  • Adding Users
  • Deleting Users
  • Modifying User Attributes
  • The Login Process
  • /etc/profile and .profile
  • Communicating With Users: /etc/issue
  • Communicating With Users: The Wall Command
  • File System Basics

  • The Hierarchy
  • Files
  • Directories
  • Special Files
  • Character and Block Devices
  • The/dev Directory
  • Links
  • Symbolic Links
  • A File System Tour
  • The df Command
  • The du Command
  • The find Command
  • Advanced File System Concepts

  • The Virtual File System
  • The Physical File System
  • The Inode Table
  • File Storage in Disk Blocks
  • The Superblock
  • Linux File Attributes
  • Disk Management

  • Partitions and File Systems
  • Making a File System
  • The mkfs Command
  • The mount Command
  • Sharing File Systems
  • The fstab File
  • The fsck Command
  • The lost+found Directory
  • The fdisk Command
  • Backups

  • Backup Strategies
  • Backup Tools
  • The tar Command
  • The cpio Command
  • The dump Command
  • Network Backup Strategies
  • Linux Processes

  • Overview of Processes
  • Process Space
  • Process Table
  • The fork/exec Mechanism
  • The ps Command
  • The /proc File System
  • 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

  • Overview of the Bootup Sequence
  • LILO
  • The lilo.conf File
  • The init Daemon
  • /etc/inittab
  • The init Command
  • The rc Scripts
  • Single-User Mode
  • The shutdown Command
  • Linux System Security

  • Security Overview
  • Physical Security
  • Account Security
  • SUID and SGID Settings
  • File and Directory Permissions
  • Software Security
  • Securing a Network Server
  • Firewalls
  • Performance Monitoring and Tuning

  • Performance Issues
  • Methods of Improving Performance
  • Swapping and Paging
  • Managing Swap Space
  • The top Command
  • The vmstat Command
  • The strace Command
  • Networking Utilities

  • Basic Network Needs
  • IP Addresses
  • The /etc/hosts File
  • DNS
  • The nslookup Command
  • Subnets
  • Telnet
  • FTP
  • Ping
  • Configuring TCP/IP

  • Network Interfaces
  • The ifconfig Command
  • TCP/IP and Ports
  • The /etc/services File
  • The inetd Daemon
  • The /etc/inetd.conf File
  • Network Startup
  • The netstat Command
  • The route Command
  • The traceroute Command
  • The Print System

  • Printing Overview
  • Adding a Printer
  • The lpd Daemon
  • The /etc/printcap File
  • The lpr, lpq, and lprm Commands
  • The lpc Command
  • Network Printers
  • Interfaces and Filters
  • Package Management

  • Software Installation and Management
  • The rpm Command
  • Installing and Upgrading Software With rpm
  • Removing Packages
  • The rpm Database
  • Building Software From Source
  • Server Configuration and Management

  • Standard Network Services
  • File and Print Sharing
  • Samba
  • The Apache Web Server
  • Managing FTP
  • Internet Mail Service
  • Managing a DNS Server
  • Overview of NIS

  • What is NIS?
  • Why Use NIS?
  • NIS Design and Implementation
  • NIS Maps
  • Configuring NIS

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