Udemy – Linux Diagnostics And Troubleshooting
English | Size: 2.72 GB
Category: Tutorial
This course is aimed at senior system administrators who wish to learn more about troubleshooting
What you’ll learn
Linux Diagnostics And Troubleshooting
To fix common issues on a Red Hat Enterprise Linux machine, using tools provided by the distribution.
What is troubleshooting?
Troubleshooting a login issue
Troubleshoot a web server issue using the log files
Troubleshoot a FTP Connectivity Issue
System Monitoring with Cockpit
Centralized log server using rsyslog
Advanced Intrusion Detection Environment (AIDE)
System Auditing with auditd
Identify various harwdare and their problems
Hardware Error Reporting using mcelog and rasdaemon
Manging Kernel Modules
Troubleshooting to disable MSI-X interrupt handling in the driver
Troubleshooting Storage Issues
Overview about Filesystems, Device Manager & Device Mapper Multipath
Recovering from File System Corruption
Migrating a Volume Group from one system to another
Configuration of Iscsi target & Initiator
Troubleshooting RPM Issues
Recover a corrupted RPM Database
Working with transaction history using Yum command
Troubleshooting a Network Issues
Scanning Network Ports using nmap
nc & iptraf-ng commands
Troubleshooting a network issue (One network interface is not working properly)
Troubleshooting a Boot Issues
Lab on Basic System Recovery
Reset the root passwd using installation disk or rd break
Troubleshooting a Security Issues
Troubleshooting a SELinux Issue
SELinux Audit Logs & Troubleshooting
Overview of PAM Security & Concepts of PAM
Various practice lab session
Requirements
PC or Laptop with internet Connection
A RHCSA/RHCE certification, or equivalent knowledge is required to successfully sit this course.
Description
Course Description
Linux Diagnostics And Troubleshooting
Introduction
What is troubleshooting?
Troubleshooting a login issue
Collecting Information
System Journal
Troubleshoot a web server issue using the log files
Using Red Hat Resources
Collecting Information with SOSREPORT
Practice Lab Session
Troubleshoot a FTP Connectivity Issue
Monitoring Systems
System Monitoring with Cockpit
Performance Co-Pilot or pcp
Centralized log server using rsyslog
Practice Lab Session
Intrusion detection software to monitor changes
Advanced Intrusion Detection Environment (AIDE)
Practice Lab Session
System Auditing with auditd
Identifying Hardware Issues
Identify various harwdare and their problems
Hardware Error Reporting using mcelog and rasdaemon
Memory Testing using memtest86+ package
Manging Kernel Modules
Loading and unloading modules
Managing module options
Troubleshooting to disable MSI-X interrupt handling in the driver
Troubleshooting Storage Issues
Overview of Linux Storage Stack
Virtual File System
Filesystems & Device Manager
Device Mapper Multipath
Recovering from File System Corruption
Checking & Repairing ext3/ext4 fs using e2fsck
Checking & Repairing xfs fs using xfs_repair
Recovering LVM Issues
Practice Lab Session – using vgcfgrestore
Migrating a Volume Group from one system to another
Recovering Metadata in LVM
Practice Lab Session
Configuration of Iscsi target & Initiator
Practice Lab Session on iscsi target & initiator – 1
Practice Lab Session on iscsi target & initiator – 2
Troubleshooting RPM Issues
Resolve package management dependency issues
Identify & fix dependency issue
Recover a corrupted RPM Database
Working with transaction history using Yum command
Reverting & repeating transaction using yum command
Practice Lab Session
Troubleshooting a Network Issues
Check Network Connectivity
Scanning Network Ports using nmap
Communicating with a remote service using nc command
Monitoring Network traffic using iptraf-ng
Troubleshooting a network issue (One network interface is not working properly)
Troubleshooting tips related with device names of ethernet interface
Disable consistent network device naming
Overview NetworkManager
Practice Lab Session
Capturing Packets with tcpdump
Practice Lab Sessions
Troubleshooting a Boot Issues
Linux Boot process
Booting of RHEL 7 with systemd
Overview of Grub2
Grub2 features
Booting into Grub Menu
Protect Grub by appying a password
Lab on Basic System Recovery (Initramfs file missing/Corrupted)
Lab on Basic System Recovery (Grub related issues like grub is missing)
Lab on Basic System Recovery (Master Boot Record missing/corrupted)
Rescue Modue in RHEL 7
Practice Lab Session
Reset the root passwd using installation disk
Reset the root passwd using rd.break
Repairing File System Issues at boot
Fix issues at /etc/fstab at boot – Lab Session
Troubleshooting a Security Issues
Troubleshooting a SELinux Issue
Changing SELinux context
troubleshooting ftp connectivity issue using booleans
SELinux Audit Logs & Troubleshooting
Overview of PAM Security
Concepts of PAM
PAM Modules & Configurations
PAM Module Groups
Control Flags in PAM
PAM Modules
last lecture
Who this course is for
Linux Diagnostics and Troubleshooting course is aimed at senior system administrators who wish to learn more about troubleshooting.
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