RHCE- Red Hat Certified Engineer Linux Study Guide

This book covers on the 2 main part which is
1.Troubleshooting and System Maintenance
2.Installation and Configuration
both parts comes under exam objective.Moreover  RHCT Aspirants can also use this book for the exam as every objective of RHCT is under RHCE.
RHCE focuses on Linux administration skills and is performance based exam.The book will help you to improve your skills,you can use this book even after you passed the exam.There are 16 chapters in the book which will help you practice configuring and troubleshooting linux.
Following is the Chapters of the book

Chapter 1-RHCE Prerequisites
Chapter 2 - Hardware and Installation
Chapter 3 - The Boot Process
Chapter 4 - Linux Filesystem Administration
Chapter 5 - Package Management
Chapter 6 - User Administration
Chapter 7 - System Administration Tools
Chapter 8 - Kernel Services and Configuration
Chapter 9 - Apache and Squid
Chapter 10 - Network File-Sharing Services
Chapter 11 - Domain Name Service
Chapter 12 - Electronic Mail
Chapter 13 - Other Networking Services
Chapter 14 - The X Window System
Chapter 15 - Securing Services
Chapter 16 - Troubleshooting

Download it here