RHCE RHCT EXAM: How to reboot Redhat linux

How to reboot or Shutdown Redhat linux :

REBOOT REDHAT LINUX :

#shutdown -r now

OR

# reboot

OR init 6

OR CTRL+ALT+DEL

RHCE RHCT Linux Certification Exam : GRUB Boot loader

Configuring the GRUB Boot Loader for RHCE/RHCT :

To configure the boot loader or edit anything for GRUB configuration file is:

• /boot/grub/grub.conf
• In case MBR is corrupted try
  
• /sbin/grub-install /dev/hda
  

where hda is first installed PCI hard drive on your RHEL 4 server.




#NOTICE: You have a /boot partition. This means that
# all kernel paths are relative to /boot/
default=0
timeout=30
splashimage=(hd0,0)/grub/splash.xpm.gz

title Red Hat Linux (2.4.18-0.12)
root (hd0,0)
kernel /vmlinuz-2.4.18-0.12 ro root=/dev/hda3
initrd /initrd-2.4.18-0.12.img

RHCE RHCT Linux Certification Exam Guide :LINUX BIOS

LINUX BIOS :

When a microprocessor powers up, it starts executing instructions located in a ROM chip. These initial instructions are responsible for initializing the hardware (especially enabling RAM) and loading an operating system. The implementations and interfaces to this functionality vary from machine to machine, but its basic responsibility remains the same.

Here is an excelllent Resource on LINUX BIOS initialization ....

RHCE RHCT Linux Certification Exam: RHEL Boot sequence

Redhat Enterprise Linux 4 Boot Sequence :

For RHCE and RHCT exam you should know RHEL4 boot sequence as follows:

• Bios Initialization
• Loading Boot Loader phase
• Kernel initialization
• init startup which is first process to run in Linux during startup
• Launching X or GUI if enabled

RHCE RHCT Linux Certification:RHCE Voted #1 Unix/Linux Certification

In December 2005 RHCE is vite #1 in Linux/UNIX Certification according to certcities.com. Red Hat's hands-on, flagship RHCE title is once again your pick for the best Linux certification, easily taking the top spot thanks to its stellar reputation, earned thanks to its eight-hour, hands-on lab exam and marketability in the industry.

RHCE Red Hat Certification Guide for Linux Exam RH302

RHCE Red Hat Certified Engineer Linux (Exam RH302) Analysis :
This book is best for RHCE Linux certification exam. This linux certification exam book covers classroom-based integrated study system for professional certification gives you complete coverage of all objectives for the Red Hat Certified Linux Engineer exam, hundreds of review questions, and hands-on lab exercises. The CD-ROM features two complete pencil and paper RHCE practice exams (available to Linux users), an electronic book, and a bonus Red Hat installation screen review.


If you are looking for good book to help you prepare for Red Hat Certification Engineer (RHCE) exam , you should look no further.Since RHCE exam is now hands-on the CD covers two complete sample exams based on what is publicly known about the RHCE exam experience.If you're really serious about getting most famous Linux certification exam (RHCE), read this book. I am working on Linux since 2001 but didn't appear for any Linux Certification exam. Finally when i heard RHCE - is very popular linux certification exam i brought this Linux certification book to prepare for RHCE exam.

RHCE RHCT Linux Certification: Top rated Linux certifications

RHCT and RHCE Linux certifications are top rated Linux certifications in Market.A recent Independent Survey ranked RHCE highest quality training and certification in IT.
RHCT and RHCE certifications are Current for Red Hat Enterprise Linux 4 .RHCE is best fit for :

• Experienced Linux and UNIX systems administrators and engineers.
• UNIX administrators who have other UNIX certtifications but want to be Linux administrator as well with current growing demand for Linux in market.
  
• UNIX and/or Linux power-users who may want focused training and certification on Red Hat Enterprise Linux
  

RH300 is best suited Training consists of 4 days of intensive training, emphasizing hands-on lab workshops with realistic configuration and administration tasks using Red Hat Linux, plus the Certification Lab Exam on day 5th day.

What it means to have RHCE and RHCT Certification ?

• RHCE or RHCT certification serve as a metric of use to both individuals and employers to assess individual preparation and competency for key job roles involving Red Hat Linux computing

• RHCE certification indicates that the person has passed a performance-based lab exam that tests his/her ability to: install and configure Red Hat Linux; understand limitations of hardware; configure basic networking and file systems for a network; configure the X Window System; perform essential Red Hat Linux system administration; configure basic security for a network server; set up and manage common enterprise networking (IP) services for the organization, carry out server diagnostics and troubleshooting.

• RHCT certification indicates that the person has passed a realistic performance-based lab exam that tests his/her ability to: install and configure Red Hat Linux; understand limitations of hardware; configure basic networking and file systems for a single system attached to a network; configure the X Window System; perform essential Red Hat Linux system administration; configure basic host security, set up client-side networking services required to attach to a production network, and carry out basic diagnostics and troubleshooting.

RHCE and RHCT linux certification exams are lab-based, performance-based practical exams.

RHCT RHCE Linux Certification Exam:what you need to know for RHCT Certification

If you are already working on linux or even you are new you should know some of the required
skills for RHCT certification exam:

RHCTs should be able to perfoorm following Trouble shooting and system maintenance work :

• 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

RHCT RHCE Linux Certification EXAM GUIDE :RHCT exam course

Redhat offers Instructor based courses forRHCT and RHCE exams. If you are a working Professional chances are your Employer will send you for Training. If you have some working experience on redhat linux you should take course RH133 .RH133 is 4 and hald day class and included RHCT exam at the end of last day. Not to get confused here RHCT exam is also called RH202 RHCT Certification lab exam. If you are windows professional or new in IT you should go
with RH033 - Redhat Linux essentials course.

Again RHCT exam is performance based exam , all you need is hands on experience on Linux.

Requirement for RHCT exam is :RH033, RH133, or equivalent experience attaching new Red Hat systems to a corporate network. RHCT exam is best exam in Linux world and available at a proce tag of $2,298 from Redhat.

RHCE RHCT EXAM: Red Hat Linux Certification Exam Simulator

Few websites are offering Red Hat Linux Certification Exam simultaor. I have't used any Redhat Linux Certification simulator mydelsf, but if you like and want to score 100% you can try one of these .

Ensure your success in RHCE (Red Hat Linux Certification) with Whizlabs simulator, the most effective training software for the Linux certification. Developed by highly experienced and certified professionals, it offers 5 mock exams (250 questions) on the latest pattern in a simulated environment. Last but not the least; it comes with FREE technical support and "Unconditional 100% Money Back Guarantee". Check out the FREE demo version.

RHCT RHCE Linux Certification EXAM GUIDE Simulator

Few websites are offering Red Hat Linux Certification Exam simultaor. I have't used any Redhat Linux Certification simulator mydelsf, but if you like and want to score 100% you can try one of these .


Whizlabs RHCE (Red Hat Linux Certification) Exam Simulator

Ensure your success in RHCE (Red Hat Linux Certification) with Whizlabs simulator, the most effective training software for the Linux certification. Developed by highly experienced and certified professionals, it offers 5 mock exams (250 questions) on the latest pattern in a simulated environment. Last but not the least; it comes with FREE technical support and "Unconditional 100% Money Back Guarantee". Check out the FREE demo version.

RHCT RHCE EXAM GUIDE : RAID 5 in Redhat Linux

RAID 5 requires 3 disks or disk partitions of same size. Like RAID 0 this RAID level also allows you to create filesystem larger then any one disk partititions. For eample if you have 3 - 72 Gb hard disks you can have one filesystem as big as "140 " Gb disk size third disk will be used for parity saving. If you loose one disk you will be able to recover your data without any issue unlike mirroring.

RHCT RHCE Linux Certification EXAM GUIDE :RAID 1 in Linux

RAID level 1 also called "mirroring" and requires two RAID partitions.If any disk in the RAID fails, the RAOD device continues to function without loosing any data.

This is very useful fault tolerant , it's costly interms of disk requirements...

Performcance for read and writes are good.

RHCT RHCE EXAM GUIDE: Software RAID 0 on Linux

RAID 0 in Linux requires atleast 2 RAID partitions. RAID 0 in Linux offers high performanxe for read and writes.In Linux RAID 0 t doesn't offer any redundancy if one device fails it destroys your whole disk device.

RHCT RHCE EXAM GUIDE: Can i use RAID on linux ?

Linux supports Both Hardware and Software RAID. RAID is an acronym for "redundant array of inexpensive disks". During linux installation you will have option to use

• RAID 0 : called striping which offers no redundancy
• RAID 1: called Mirroring
• RAID 5 : Striping with distibuted parity

RHCT RHCE EXAM GUIDE : How much Swap needed for Linux

"swap" is also known as "virtual memory" in windows world. If you don't have enough physical memroy in your pc to run your operating system you can use "swap" to run your operating system in our case we will say Linux.

recommended swap space is usually twice as of real memory (2X)

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Recently i brought D-Link DI-624 Wireless router that supports 802.11g to upgrade my home wireless network.I got so frustrated using my 10 Mbps wireless router , i was getting disconnected and getting very weak signal in between... Many time i have to reboot my PC . I am running windows XP on my PC..... Finally when i was filing my taxes online last week .... my internet connection dropped 10
Buy on sale after MIR for $45.29
times....


I went to Best buy and Purchased D-Link wireless router for a faster 108Mbps network which cost me around $75 .... and a wireless USB adapter for my PC which costs me $70...

But let me tell you once i installed it and start surfing internet it was 100 times faster than speed that i used to work on ... Finally I jumped to amazon and find out it's selling same stuff was on sale for 22% less...

RHCT RHCE EXAM:How to enable telnet on Redhat Enterprise Linux server ?

How to enable telnet on Redhat Enterprise Linux server ?

By default redhat enterprise linux comes with SSH (secure shell) enabled with telnet disabled.telnet is not secure anymore but people still prefers telnet due to it's simple nature.

1. Please make sure to check if you have telnet server installed on your server:

[root@pluto~]#rpm -qa grep telnet

telnet-0.17-31.EL4.3

telnet-server-0.17-31.EL4.3

2.If you do not have the telnet-server or telnet packages installed, you can install from the RPMs available from your installation media or you can use the up2date utility along ith your RHN subscription to download and install the packages :

[root@pluto~]# up2date telnet-server telnet

3.To install telnet server use :

[root@pluto~]# rpm -ivh telnet-server-0.17-31.EL4.3.rpm

4. After installing telnet make sure to activate telnet services in /etc/xinetd.d/telnet file and Change disable yes to no :

# default: on

# description: The telnet server serves telnet sessions; it uses \

# unencrypted username/password pairs for authentication.

service telnet

{

flags = REUSE

socket_type = stream

wait = no

user = root

server = /usr/sbin/in.telnetd

log_on_failure += USERID

disable = no

}

5.

Now we have to enable Telnet server using the chkconfig command so when server reboots everytime we don't have to start the service manually .You must be root in order to use these commands.

[root@pluto~]#chkconfig --list telnet

telnet off

[root@pluto~]#chkconfig --level 123456 telnet on

[root@pluto~]# chkconfig --list telnet

telnet on

6.Finally we need to turn on the service using xinted

[root@pluto~]# service xinetd restart

Starting xinetd: [ OK ]

Here you go telnet is now enabled:

[root@pluto ~]# telnet localhost

Trying 127.0.0.1...

Connected to localhost.localdomain (127.0.0.1).

Escape character is '^]'.

Red Hat Enterprise Linux AS release 4 (Nahant Update 2)

Kernel 2.6.9-22.0.1.EL.rootsmp on an i686

login: hello

Password:

RHCT RHCE EXAM GUIDE : Free linux

For RHCT and RHCE exam which is performance based exam reading book is not going to help you no matter if you cram each text of the page. You need to have hands on experience on Linux.
For that you would need to install Linux... and yes Linux is free as water... so here you go ...

If you don't want to buy redhat linux or SUSE linux , you can download Fedora which is totally Free... It's an opensource project started by Redhat itself.

Enjoy !! Free Linux

RHCT RHCE EXAM GUIDE : Passing RHCT with Good Score

How to score High in RHCT certification exam

Redhat certification exams are performance base exam . You don't need bookish knowledge to pass certification exam unlike other UNIX or Windows certification exams. You needs hands on experience . For hands on experience on Linux you certainly requires a pc or laptop running Linux at home. But i must say this book really help me in passing RHCT certification exam and scoring High.

• Real-World Exercises--Step-by-step instruction modeled after the hands-on RHCT exam questions

• Inside the Exam sections highlight key exam topics covered and how to answer questions correctly
• Lab questions match the format, tone, topics, and difficulty of the real exam
• Money-saving tips explain how you can study for the exam without buying Red Hat Enterprise Linux
  

It Covers all RHCT exam topics, including:

• Installation
• Configuration
• Basic Administration
  
• Filesystem Management
  
• Kernel, Cron, and User Administration
  
• X Window System
  
• Linux Network Clients
  
• Operational Administration Recovery and Security
  

The best fully integrated study system available. True to the format of the RHCT exam! CD-ROM includes:

• Two complete RHCT exams featuring the same types of hands-on problems that you’ll see on the live exam