Course Details
Course Description:
The Red Hat Enterprise Linux Diagnostics and Troubleshooting (RH342) course is a 5-day course that is designed to teach system administrators techniques for troubleshooting a Linux system and how to use the troubleshooting tools available on Red Hat Enterprise Linux. Through hands-on labs, students will learn or improve their troubleshooting skills and gain additional experience by debugging live, virtualized systems.
Topics covered in the course include:
- Troubleshooting techniques, including being prepared
- Troubleshooting hardware, including listing, testing, and analyzing devices
- Troubleshooting applications, including diagnosing performance problems and investigating application and OS interactions
- Troubleshooting disks and file systems, including LVM, LUKS, ext3/4, and unauthorized changes
- Troubleshooting the network, including configuring, testing, and diagnosing problems with basic and advanced configurations
- Security, including working effectively with (and not against) security tools such as SELinux, authentication, and firewall
- Making the most of Red Hat support resources
Target Student:This course is designed for the following students:
Linux system administrators who understand installation and configuration of a Red Hat Enterprise Linux system and wish to deepen their understanding of troubleshooting on Linux
Prerequisites: Students should possess the following experience before attending the course:
- Red Hat System Administration I and Red Hat System Administration II
- RHCSA Rapid Track Course
- RHCSA certification or equivalent experience
- System administration knowledge under Red Hat Enterprise Linux, including:
- Installation
- Service management (using service and chkconfig, for example)
- Basic system monitoring (using ps and top and perhaps meminfo and the /proc file system)
- File system management (using fdisk and mkfs)
- Basic troubleshooting (including managing log files and perhaps using hardware probing tools, such as ethtool and lspci)
Course Outline
1. Being Proactive, Part 1
- Monitor log files, hardware, and file systems
- Monitor system and network performance
2. Being Proactive, Part 2
- Approaches to managing configuration changes and developing a recovery plan
3. Basic Troubleshooting Techniques and Procedures
- Recovery runlevels and rescue mode
- Work with advanced GRUB features
4. Hardware Issues
- Preempting hardware failures (looking for the signs)
- Protecting against hardware failures
- Redundant configurations
- Tools to help identify hardware failures and intermittent problems
5. File System Issues
- Locate unauthorized changes
- Audit software
- File system tuning and repair
- File recovery
6. Disk Issues
- Rescuing LVM volumes
- Maintenance of LUKS-encrypted volumes
7. Networking Issues
- Manual configuration of network cards
- Connectivity issues
- Network diagnostic tools
- Monitor packets
- Tune kernel parameters
- Troubleshoot SAN communication
8. Application Issues
- Tools and techniques for troubleshooting applications
- Common application problems and how to solve them
9. Security Issues
- Working effectively with (and not against) security tools
- SELinux
- Authentication
- Firewall
10. Red Hat Resources
- Support options
- Knowledgebase
- Certified training
- Initiating support calls
- Technical account manager support
- Developer support
- Bugzilla
- Support workflow
- Diagnostic and information-gathering tools
Check the course description for any prerequisites.
Virtual Live Instructor
Free Training Materials
Convenient Scheduling
Testimonials
This was the class I needed.
The instructor Jeff took his time and made sure we understood each topic before moving to the next. He answered all of our questions, and I don't know about the rest of the students, but was very pleased with this experience.
I finally understand how to use Excel.
-Amanda T (Yale New Haven Hospital).
Great class!
We were able to cover a lot of information in one day without getting overwhelmed.
-Maria R (Microsoft).
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