Troubleshooting CentOS : a practical guide to troubleshooting the CentOS 7 community-based enterprise server / Jonathan Hobson.

Format:

Book

Author/Creator:

Hobson, Jonathan, author.

Series:

Community experience distilled.

Community Experience Distilled

Language:

English

Subjects (All):

Linux.

Operating systems (Computers).

Computer science.

Physical Description:

1 online resource (190 p.)

Edition:

1st edition

Other Title:

Troubleshooting Cent operating system

Practical guide to troubleshooting the CentOS 7 community-based enterprise server

Place of Publication:

Birmingham, England : Packt Publishing, 2015.

Language Note:

English

System Details:

text file

Biography/History:

Hobson Jonathan: Jonathan is a web developer, systems engineer and applications programmer, who, for more than 20 years has been working behind the scenes to support companies, organizations and individuals around the world to realize their digital ambitions. With an honors degree in both English and History and as a respected practitioner of many computer languages Jonathan enjoys writing code, publishing articles, building computers, playing the video games and getting 'out and about' in the big outdoors. He has been using CentOS since its inception and over the years, it has not only earned his trust, but it has become his first choice server solution. CentOS is a first class community based enterprise class operating system, it is a pleasure to work with, and because of this Jonathan has written this book in order that his knowledge and experience can be passed on to others.

Summary:

It is assumed that you will already have a server up and running, you have a good working knowledge of CentOS, and you are comfortable with the concept of working with those services used by your server.

Contents:

""Cover ""; ""Copyright""; ""Credits""; ""About the Author""; ""About the Reviewers""; ""www.PacktPub.com""; ""Table of Contents""; ""Preface""; ""Chapter 1: Basics of Troubleshooting CentOS ""; ""Installing some basic tools""; ""Gathering hardware information""; ""Understanding dmesg""; ""Understanding log files""; ""Reading log files and affecting the output""; ""Using tail to monitor log files""; ""Using cat, less, and more""; ""Using grep""; ""Using diff""; ""Using truncation""; ""Summary""; ""References""; ""Chapter 2 : Troubleshooting Active Processes""

""Tuning server performance with memory management and swap""""Managing memory with vmstat""; ""Checking the system load with the top command""; ""Monitoring disk I/O with iotop""; ""Checking processes with the ps command""; ""Checking performance with iostat and lsof""; ""Calculating the system load""; ""Discovering process IDs with pgrep and systemctl""; ""More about systemd""; ""Issuing the kill signal""; ""Dealing with an orphaned process""; ""Summary""; ""References""; ""Chapter 3 : Troubleshooting the Network Environment""; ""Using ping, dig, host, traceroute, and mtr""

""The ping command""""The dig and host commands""; ""The traceroute command""; ""The mtr command""; ""Monitoring network connections with the ss command""; ""Packet analysis with tcpdump""; ""Summary""; ""References""; ""Chapter 4 : Troubleshooting Package Management and System Upgrades""; ""Gathering software information""; ""Using Yum plugins""; ""Fixing Yum operations""; ""Installing additional Yum repositories""; ""EPEL""; ""Remi""; ""The IUS repository""; ""Downloading an RPM package with Yum""; ""Diagnosing a corrupt RPM database""; ""Minor release upgrades""; ""Summary""

""References""""Chapter 5 : Troubleshooting Users, Directories, and Files""; ""Users""; ""Adding users and forcing a password change""; ""Deleting users""; ""Modifying a user""; ""Meet login.defs""; ""Monitoring user activity with utmpdump""; ""Resetting the root password and enhancing logging""; ""Recovering lost or deleted files with Scalpel""; ""Restoring file and directory permissions""; ""Working with, and extending, the XFS filesystem""; ""Running repairs on XFS""; ""Investigating fragmentation on XFS""; ""Auditing directories and files""; ""Visualizing directories and files""

""Summary""""References""; ""Chapter 6 : Troubleshooting Shared Resources""; ""Providing NFS shares on a CentOS 7 server""; ""About NFS exports""; ""Mounting NFS shares on a CentOS client""; ""Mounting an external drive with CIFS""; ""Using autofs to mount an external drive""; ""Summary""; ""References""; ""Chapter 7 : Troubleshooting Security Issues""; ""Auditing SELinux with aureport and setroubleshoot""; ""SSH banners""; ""Tuning SSH""; ""Intrusion detection with Tripwire""; ""Firewalld � zone, service, and port management""; ""Removing Firewalld and returning to iptables""; ""Summary""

""References""

Notes:

Description based upon print version of record.

Includes bibliographical references at the end of each chapters and index.

Description based on online resource; title from PDF title page (ebrary, viewed July 7, 2015).

OCLC:

913880048