RHCT RHCE Exam: practice questions

RHCE RHCT Practice questions of the Day !

Question:How you can check status of network interface ?

Answer : # ifconfig eth0

Number of open files per process in RHEL4 redhat Linux

In RHEL4 (redhat hat enterprise Linux 4 AS ) running kernel 2.6 the number of open files per process is still limited to 1024. you can do ulimit -a to see number of open files per user :

[root@firefox] /# ulimit -a

core file size (blocks) 1000000
data seg size (kbytes) unlimited
file size (blocks) unlimited
max memory size (kbytes) unlimited
stack size (kbytes) 8192
cpu time (seconds) unlimited
max user processes unlimited (1)
pipe size (512 bytes) 8
open files 1024
virtual memory (kbytes) 2105343


To Increases the system limit on open files for instance a process on change the number of open files for Oracle , IB DB2 databases in redhat enterprise Linux (RHEL4) :

#ulimit -n 90000

To make changes permanent add soft and hard limits in /etc/security/limits.conf file :

* soft nofile 90000
* hard nofile 90000

RHCE RHCT Exam: RHCE Certification Training

Red Hat RHCE certification training is experiencing a great demand within the IT industry.
In recent years, the RHCE certification has become a global standard for many successful IT companies,increasing the importance of having a RHCE Red Hat certification.If you are interested in passing the RHCE certification exam and the RHCE certification testing requirements to start earning that high paying RHCE certification salary you always wanted. Then you have to read redhatcert.blogspot.com where i am putting tips,quetions training books,site that will ensure you pass your Red Hat RHCE exams on your first try.
As i was able to pass my RHCT exam .you can use other free RHCE materials and free RHCE study guide resources,but only Redhatcert Blog delivers you the most accurate, current and updated tips for RHCE certification.

Looking to become an RHCE Red Hat certified professional? Would you like to reduce or minimize your RHCE certification cost? Do you want to pass all of the RHCE certification tests? If you answered YES, then look no further. Keep reading this Blog and i have added seach on my Blog .I am trying to add best resource for RHCE certification training solutions that cover all core topics and RHCE certification requirements found in the RHCE certification test.

RHCT RHCE Exam: questions

For RHCT and RHCE exam questions, you should know about networking as it is required for these exams under Networking configuration :

• network card/device is recognised as eth0 in redhat linux and other flavours of linux
• ifconfig eth0 will display ip address for network interface
• you should expect questions in RHCE/RHCT exam to bring up and down network interface:
• ifup eth0
• ifdown eth0
• For RHCT/RHCE exam question you should know network configuration files:
• /etc/sysconfig/network-scripts/ifcfg-eth0 is network configuration file

DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.30.29
NETMASK=255.255.255.0
GATEWAY=192.168.30.1

• For RHCT/RHCE exam you should know how to change static ip to dhcp
• Simply change BOOTPROTO to dhcp from none

• you can also run system-config-network to change these settings by GUI but for RHCT and RHCE exam you should know how to change network setting using command line that will save time as time is critical in RHCT and RHCE exams.
  

RHCT RHCE Exam :Redhat Linux Exam Certification Tip 1

RHCE RHCT Linux Certification Exam :Tip 1

Since RHCT and RHCE exam are Performance based exam, you don't need any book or Exam Cram. I realized this when i passed my RHCT exam without reading a book. All you need is PC running Linux. If you don't have PC at work or at home ..Buy one PC , belive me this will help you for RHCT and RHCE Linux certification Exam.Best tip for RHCE/RHCT exam is to have hands on experience... a pc running linux at home

If you already have PC then for installing Linux you have to partition your har drive and this is critical step , if you are not an PC expert you might loose your data while partitioning your single har drive and might loose important data. But here is good news using VMware you can install Redhat Linux on your windows operating system. Search this blog on your left you will find where and how you can get Vmware.

RHCE RHCT Exam: How to enable root telnet for redhat enterprise Linux RHEL4

How to enable root telnet for redhat enterprise Linux RHEL4:

To enable direct telnet for root account on redhat linux enterprise servers ( i have done wthis on RHEL3 and RHEL4 without any issues ) over the network :

under /etc/ directory edit /etc/securetty file and add pts entries :

pts/0
pts/1
pts/2
pts/3
pts/4
pts/5
pts/6
pts/7
pts/8
pts/9
pts/10

or Just remove /etc/securetty file alltogether , i prefer moving /etc/securetty it.

mv /etc/securetty /etc/securetty.sav

Bingo root telnet is enabled now ... on redhat enterprise Linux 4 .That's all you need to do to enable telnet access for root account on Linux servers. Root access is activated right away you don't need to restart any services on redhat linux .


Warning : telnet is not secure and you should be using SSH only for logins on RHEL4.Keep reading redhatcert blog to find out how to enable SSH logins on redhat enterprise Linux 4.

RHCE RHCT Linux EXAM CRAM

RHCE and RHCT Linux Exam Cram :

Although there are several books available online and in stores for RHCE and RHCT Exam Cram.But Buying Linux Exam Cram doen't make any sense. There are books out there :

• RHCE Linux Exam Cram: RH302.
• LPIC I Exam Cram 2 : Linux Professional Institute Certification (Exam Cram 2)

Don't Buy any more Linux "Exam Cram" because Linux is performance based exam.I don't understand there are so many Linux Exam Cram book out there and many websites claiming Exam Cram online to pass RHCT and RHCE exam. Truth is there are no multiple choice questions in RHCE and RHCT exam . so..... don't get fooled and please don't purchase any Linux exam cram for RHCT and RHCE.. If you really want to purchase any RHCE/RHCT exam book
buy RHCE exam study Guide RH302

But again no linux exam cram ....don't buy any linux exam cram and don't get fooled.

RHCE RHCT EXAM: configure kernel parameters in redhat enterprise Linux

configure kernel parameters in redhat enterprise Linux :

How to turn off ping response in redhat Linux :

#cat /proc/sys/net/ipv4/icmp_echo_ignore_all
0

Zero means ping is enable and Linux machine will respond to ping requests.

# echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all

This kernel change is not permanent , to make it permanent add to /etc/sysctl.conf :

net.ipv4.icmp_echo_ignore_all=1

RHCE RHCT Exam questions : enable telnet services on Linux

How to enable telnet services on Redhat enterprise Linux :

# chkconfig telnet --list
#chkconfig telnet on
#chkconfig --level 35 telnet on

where 3 and 5 are run levels , so telnet will run when Linux is running in runlevel 3 and 5 only.

RHCE RHCT Exam questions : How to change Linux default run level

You shoud know how to change Redhat Linux system default run level for RHCE and RHCT exam preparation and questions :

1. edit /etc/inittab file and changerun level from level 5 (which is X or GUI mode ) to run level 3


# vi /etc/inittab
id:3:initdefault:

2. simply reboot the server and your default run level changes to level 3 which is text based linux session.

3.How to dynamically change the runlevel of Linux system without rebooting

• e.g: switch to single user mode :

# telinit S

• e.g: switch to X or GUI (desktop) mode

#telinit 5

• e.g:If you have made changes to the /etc/inittab file to change the default runlevel and want to change the system to that new default you can do so by using the telinit with the q command-line option:

# telinit q

RHCE RHCT EXAM: Pass exam

About Passing RHCT and RHCE exam , both exams are Pass or non-Pass. Redhat Send results for pass or did not pass within 3 Business days.

How do you receive your RHCT/RHCE Certificate:

If you pass your RHCT and RHCE exams , you will receive certificate in form of PDF emailed to you.Redhat doesn't mail RHCT and RHCE certificate bia regular mail.

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.