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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
- 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:"
1339,1452,,1268,Red Hat System Administration I (RH124),0,0,RedHat,redhat-tb.png,,redhat," The Red Hat System Administration I (RH124) course is a 5-day course that was designed to help students learn the fundamental administration skills needed to manage a Red Hat Enterprise Linux system.
This course relates to Red Hat Enterprise Linux 8 and provides core survival? skills for IT professionals looking to become full-time Linux system administrators. You will master the skills to perform essential Linux administration tasks, including installation, establishing network connectivity, managing physical storage, and basic security administration.
Basic administration and configuration functions are covered, laying the foundation for rapid deployment of Red Hat Enterprise Linux.
This course will help students the following areas:
- Accessing & managing files from the command line
- Creating, viewing, and editing text files
- Managing local Linux users and groups
- Monitoring and managing Linux processes
- Controlling services and daemons
- Controlling access to files with Linux file-system permissions
- Analyzing and storing log files
- Configuring and securing the OpenSSH service
- Installing and updating software packages
- Accessing Linux file systems
- Managing Linux networking
Topics covered in the course include:
- Introduction to the command line
- Managing physical storage
- Learning how to install and configure software components and services
- Establishing network connections and firewall access
- Monito
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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