1.考生必须必须掌握以下基本技能，因为它们是RHCE考试中必考的内容

　　* use standard command line tools (e.g.， ls， cp， mv， rm， tail， cat， etc.) to create， remove， view， and investigate files and directories

　　* use grep， sed， and awk to process text streams and files

　　* use a terminal-based text editor， such as vi/vim， to modify text files

　　* use input/output redirection

　　* understand basic principles of TCP/IP networking， including IP addresses， netmasks， and gateways

　　* use su to switch user accounts

　　* use passwd to set passwords

　　* use tar， gzip， and bzip2v

　　* configure an email client on Red Hat Enterprise Linux

　　* use mozilla and/or links to access HTTP/HTTPS URLs

　　* use lftp to access FTP URLs

　　2.排错和系统维护

　　* boot systems into different run levels for troubleshooting and system maintenance

　　* diagnose and correct misconfigured networking

　　* diagnose and correct hostname resolution problems

　　* configure the X Window System and a desktop environment

　　* add new partitions， filesystems， and swap to existing systems

　　* use standard command-line tools to analyze problems and configure system

　　安装配置

　　* perform network OS installation

　　* implement a custom partitioning scheme

　　* configure printing

　　* configure the scheduling of tasks using cron and at

　　* attach system to a network directory service， such as NIS or LDAP

　　* configure autofs

　　* add and manage users， groups， and quotas

　　* configure filesystem permissions for collaboration

　　* install and update RPMs

　　* properly update the kernel RPM

　　* modify the system bootloader

　　* implement software RAID at install-time and run-time

　　* use /proc/sys and sysctl to modify and set kernel run-time parameters

　　* use the rescue environment provided by first installation CD

　　* diagnose and correct boot failures arising from bootloader， module， and filesystem errors

　　* diagnose and correct problems with network services (see Installation and Configuration below for a list of these services)

　　* add， remove， and resize logical volumes

　　安装配置

　　RHCE还必须掌握以下网络服务的配置和使用：

　　* HTTP/HTTPS

　　* SMB

　　* NFS

　　* FTP

　　* Web proxy

　　* SMTP

　　* IMAP， IMAPS， and POP3

　　* SSH

　　* DNS

　　对于以上每一种服务，RHCE必须具备如下技能：

　　* install the packages needed to provide the service

　　* configure the service to start when the system is booted

　　* configure the service for basic operation

　　* Configure host-based and user-based security for the service

　　RHCE必须同时掌握：

　　* configure hands-free installation using Kickstart

　　* implement logical volumes at install-time

　　* use PAM to implement user-level restrictions