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This course provides the students with the knowledge of how services are configure, controlled and manipulated in order to improve the overall performance in some cases.

Course Outline
This course provides the students with the knowledge of how services are configure, controlled and manipulated in order to improve the overall performance in some cases. This course works at a kernel level viewpoint and provides a solid review of Intrusion Detection System fundamentals.

Target Student:
Students enrolling in this course should have some Linux system administration and management experience and understand basic kernel internal concepts.

Delivery Method:
Instructor-led, group-paced, classroom-delivery learning model with structured minds-on and hands-on activities.

Students will learn how to troubleshoot various system services and facilities by understanding the concepts of the service and the specifics of the service controls.

Students will be exposed to:

  •   Understanding the Linux way before troubleshooting
  •   Installation and Rescue tips
  •   Using Standard Utilities for managing files
  •   Intrusion Detection Systems
  •   Dealing with Software
  •   Best tools review
  •   Networking Fundamentals
  •   Filesystem and User Recovery Tools and Techniques
  •   Kernel Tuning and Security Features

Course Description I Basic Linux Troubleshooting Overview
  • Overview of OS, features, advantages
  • Recommended Hardware
  • So What Can Go Wrong?

II Installation and Rescue Tips
  • Hardware Discovery Listing dmesg
  • Recovery of MBR, sulogin
  • Single user, rescue mode

III Basic Troubleshooting Utilities, SCM, IDS
  • Preparation Before Disaster Strikes
  • Identifying issues, causes and effects
  • Troubleshooting Best Practices: KISS
  • Other options: SCM
  • Why Use IDS? Intrusion Detection
  • Establishing and Checking a Baseline

IV Software Management RPM+YUM
  • Add/erase/update/Find/Query/Verify
  • RPM Frontend yum, RedHat Network
  • Issues with package dependencies
  • Issues with RPM and YUM setup
  • Checking packages and signatures

V System Administration Tools
  • Using cron, crontab for System maintenance:
  • - tmpwatch, logwatch, webalizer
  • man + file indexing
  • Troubleshooting task control,
  • Remote Log Maintenance,
  • Network Printer setup and files,
  • After hours load balancing with crond
  • Locating irregular file permissions

VI Quick Tour of Script Tools
  • Redirecting Input and Output, Overwriting and Appending
  • Redirecting Standard Error, Redirecting Both stdout, stderr
  • Using /dev/null, Using Pipes to Connect Processes
  • Counting Words, Lines and Characters Using wc
  • Sorting Rows of Records by Any Field Using sort
  • Printing Specific Strings Within Files Using grep
  • Printing Selected Columns and Fields Using cut
  • Rearranging Columns and Fields Using cut
  • Other String Processing Tools Using join, tee
  • Determining Differences Between Files Using diff,cmp

VII Linux Filesystem, Problems and Recovery

  • Adding additional disk space
  • Partitioning disk space
  • Dealing With Extended attributes – acl
  • Recovering Ext2/3 File Systems
  • Recovering RAID and LVM
  • Restoring Deleted Files

VIII The Boot Process + X
  • Bootup Configuration and Recovery
  • Recovery of X, GNOME and KDE
  • Creating Alternate Boot Device: Floppy, CDROM
  • Recovering MBR, bad blocks
  • Working At GRUB Command Line

IX User Administration
  • Recovering User and Group Datafiles
  • Understanding Pluggable Authentication Modules PAM
  • Configuring NIS and LDAP Client setup
  • Establishing and Maintaining User Quota System

X Network Issues
  • Recoverying Network and configuration scripts
  • Overview IPv6
  • Scanning Open Ports
  • Sniffing Network Protocols
  • Firewall and TCP_Wrappers

XI Kernel Tuning and Issues, Process Controls, SELinux
  • Shells and sub-shell processes
  • Sourcing shell scripts, ps, jobs
  • Process Mgmt - &, nice, renice
  • wait, sleep, fuser, ulimit
  • kill, trap
  • /proc file system
  • Kernel Parameter Tuning
  • Understand and Recover SELinux

XII Software And Application Troubleshooting
  • Where To Start: System or Application problems?
  • Checking The Obvious First: network, devices
  • NFS, autofs, SMB, System Accounting Report sar
  • Tracing and debugging applications
  • Kernel dumps

Prerequisites & Certificates

LC101, LC401 or equivalent knowledge. This course assumes the student has already taken the Introduction to Linux Commands and Utilities, LC101, and Linux Administrative Workshop, LC401, courses or has the equivalent experience. To ensure your success, we recommend you have some working knowledge of your computer's operating system.

Certificates offered

Certificate of Completion

Cancellation Policy
Student cancellations and/or rescheduling of public courses made within TEN (10) business days or less of the course start date will be charged at 100% of the full value.
Map & Reviews
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Above and beyond for course and presenter - only downside was HVAC problems in classroom space which limited airflow and regulation of temperature all week.
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