Red Hat Enterprise Linux Troubleshooting Guide

Trouble

shooting

Red

Hat

需积分: 12 107 浏览量更新于2023-05-26 评论收藏 2.53MB PDF 举报

身份认证购VIP最低享 7 折!

领优惠券(最高得80元）

试读

650页

Red Hat Enterprise Linux Troubleshooting Guide 2015

资源详情

资源评论

资源推荐

Red Hat Enterprise Linux

Troubleshooting Guide

Download from finelybook www.finelybook.com

Table of Contents
Red Hat Enterprise Linux Troubleshooting Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Support files, eBooks, discount offers, and more
Why subscribe?
Free access for Packt account holders
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Errata
Piracy
Questions
1. Troubleshooting Best Practices
Styles of troubleshooting
The Data Collector
The Educated Guesser
The Adaptor
Choosing the appropriate style
Troubleshooting steps
Understanding the problem statement
Asking questions
Tickets
Humans
Attempting to duplicate the issue
Running investigatory commands
Establishing a hypothesis
Download from finelybook www.finelybook.com
3

Putting together patterns
Is this something that I've encountered before?
Trial and error
Start by creating a backup
Getting help
Books
Team Wikis or Runbooks
Google
Man pages
Reading a man page
Name
Synopsis
Description
Examples
Additional sections
Info documentation
Referencing more than commands
Installing man pages
Red Hat kernel docs
People
Following up
Documentation
Root cause analysis
The anatomy of a good RCA
The problem as it was reported
The actual root cause of the problem
A timeline of events and actions taken
Any key data points to validate the root cause
A plan of action to prevent the incident from reoccurring
Establishing a root cause
Sometimes you must sacrifice a root cause analysis
Understanding your environment
Summary
2. Troubleshooting Commands and Sources of Useful Information
Finding useful information
Log files
The default location
Download from finelybook www.finelybook.com
4

Common log files
Finding logs that are not in the default location
Checking syslog configuration
Checking the application's configuration
Other examples
Using the find command
Configuration files
Default system configuration directory
Finding configuration files
Using the rpm command
Using the find command
The proc filesystem
Troubleshooting commands
Command-line basics
Command flags
The piping command output
Gathering general information
w – show who is logged on and what they are doing
rpm – RPM package manager
Listing all packages installed
Listing all files deployed by a package
Using package verification
df – report file system space usage
Showing available inodes
free – display memory utilization
What is free, is not always free
The /proc/meminfo file
ps – report a snapshot of current running processes
Printing every process in long format
Printing a specific user's processes
Printing a process by process ID
Printing processes with performance information
Networking
ip – show and manipulate network settings
Show IP address configuration for a specific device
Show routing configuration
Show network statistics for a specified device
Download from finelybook www.finelybook.com
5