Information on Red Hat Certification / RHCE / RHEV / Red Hat OpenStack / RHEL 7

Hello Friends,

Certification
Certification

RHEL 7 is released, I am getting constant calls / emails / messages from many friends from different different places regarding their doubts on RHEL 5 to 6 or 6 to 7 up-gradation.

Sharing this to clear confusion / doubts.

Clear your doubts Regarding Up-gradation :-

1. Yes, RHEL 7 is out, but There is no compulsion or Mandatory from Red Hat to Upgrade your certificate from RHEL 5 to 6 or RHEL 6 to 7. Its not mandatory at all, It is all up to you.

2. Whether its RHEL 6 release or RHEL 7 release, If you are RHCE then Do not worry, Your Certificate is not going to expire. There is nothing like “expiry” in RHCE certificate, You will be still known as “Red Hat Certified Engineer” but the only difference is you will be known as “RHCE from non-current Version”.

3. RHCE Certificate / exam is not mandatory for Red Hat Enterprise Virtualization. You can give direct exam of RHEV.

4. Same in this case, RHCE Certificate / exam is not mandatory for RedHat OpenStack exam. You can give direct exam of Red Hat OpenStack.

I was getting lots of calls / emails / messages regarding these queries to help them out, I have shared this here so even if some friends from here are having same queries/doubts/confusion, So it will get cleared.

Correct me if I am wrong.

Hope this will helps you.

Please Keep in Touch with Social Networking :-Β 
Facebook Page :-Β https://www.facebook.com/AllLinuxUsersBlog

Install & Configure CVS on RHEL, Fedora 9/10.

Hi Friends,
I am Sharing method to Install & configure a basic steps to installing and configure CVS on RHEL Fedora 9 /10.

  1. First of all Install xinetd package.yum -y install xinetd

  2. Install cvs package.yum -y install cvs*

  3. Create a group cvs.

  4. Create a user cvsroot and assing it to cvs group.

  5. Now make sure that following entries are present in your /etc/services file if the entries are not present then add it manually save & exit.

    You can check entries by executing this command cat /etc/services | grep cvspserver

    cvspserver 2401/tcp # CVS client/server operations

cvspserver 2401/udp # CVS client/server operations

  1. Check your /etc/xinetd.d/cvs file and check that following entries are available and if now as above add it manually.

    Entry will look like this:-

    # default: off

    # description: The CVS service can record the history of your source

    # files. CVS stores all the versions of a file in a single

    # file in a clever way that only stores the differences

    # between versions.

    service cvspserver

    {

    port = 2401

    socket_type = stream

    protocol = tcp

    wait = no

    user = root

    server = /usr/bin/cvs

    server_args = -f –allow-root=/home/cvsroot pserver

    }

  2. Now restart your xinetd service using following command

    service xinetd restart or /etc/init.d/xinetd restart

  3. Now allow port 2401 which is cvspserver port from iptables and also allow

    SELinux exceptions.you can do that by doing this ( In “System”->”Administration”->”Security Level and Firewall”, add firewall exception of port “2401” corresponding to “cvspserver” service, and also remember to “Modify SELinux policy”->”SELinux Service Protection”->”Disable ELinux Service Protection for cvs”. )

    Now this steps are important

  4. Login as a β€œcvsroot”

  5. execute cvs -d /home/cvsroot/ init

  6. now enter into /home/cvsroot/

  7. Assign permission chmod 771 CVSROOT

  8. This time,all local real system users can log into CVS server with their own passwords.
    If you want to disable, you can do by:

  9. chmod 644 /home/cvsroot/CVSROOT/config

  10. vim CVSROOT/config

    Here you need to uncomment the line where #SystemAuth = yes. And set SystemAuth = no.

Then now your system users cannot use CVS service with their own system passwords, except you assign them manually in file /home/cvsroot/CVSROOT/passwd.

If passwd file is not available then create user by executing following commands:-

htpasswd -d -c /home/cvsroot/CVSROOT/passwd raghu (option -c is only use when you are creating first time)

To add additional user:-

htpasswd -d /home/cvsroot/CVSROOT/passwd rajiv

16. To control user access in CVS, there are three files in /home/cvsroot/CVSROOT/, respectively named passwd, readers, writers. The file readers and writers are not there by default, so you have to create them manually.

In file “passwd”, ithere stores the shadow files for username and password, following the rule:

{cvs usrname}:[encrypted pwd]:[equivalent system usrname]

where the second field is encrypted with crypt(3), just like in /etc/shadow.

The thrid field equivalent system usrname means the corresponding system priviledge the cvs usrname has.

In file “readers”, there stores the list of cvs usrnames of whom you want to enable to only have read acess.

Similarly, in file “writers”, there stores the list of cvs usrnames of whom you want to enable to only have read acess.

Now, let us suppose we have CVS users “raghu”, “rajiv”, “anonymous”. And we don’t want to give them system access, which means the corresponding system priviledge the cvs usrnames have are all null. So, we need to create an equivalent system user, which names “roadies”, who has no system priviledge at all.

$ useradd -g CVS -M -s /sbin/nologin roadies

Then edit file “passwd”, make it like:

raghu:$fajkdpaieje:roadies

rajiv:fjkal;ffjieinfn/:roadies

anonymous::roadies

Now suppose we want to let raghu has write acess while rajiv and anonymous only have read acess.

Then edit file “readers”, make it like:

rajiv

anonymous

And edit file “writers”, make it like:

raghu

Then it is all finished.

(14) Test login:

$export CVSROOT=:pserver:raghu@the_server_name:/home/cvsroot

$ cvs login

(System will ask for password for raghu)

Passwd:xxxxxxxx

There should be no error when you have successfully login to the CVS server.

Please Click on Google +1 button and Add your ratings if this works for you and you like it.

Enjoy CVS πŸ™‚ Enjoy Linux and Open Source πŸ™‚

Howto: Installing RHEL 6 Beta | Red Hat Enterprise Linux 6 Beta

Installing Red Hat Enterprise Linux ( RHEL 6.2 ) Beta

Hello Friends,

There is a 1 major release of Red Hat is about to announce. Don’t know when they will announce RHEL 6 but I have RHEL 6 beta. So I have written howto to install Red Hat Enterprise Linux 6 steps. Hope this will helps you all.

I have not used RHEL 6 that much, but my experience is not so bad as this is Red Hat product its amazing. Graphical wise if you ask me then I found it like Fedora 13 or you can say similar as Fedora. As I am using Fedora very much so GUI base i have not found so much differences but those who only uses RHEL 5 or RHEL versions they are going to be crazy about it.

Hope this Howto will help peoples who want to install Red Hat Enterprise Linux 6 on their Servers or Desktops.

Read carefully and perform following steps to Install Red Hat Enterprise Linux 6.

  1. First of all select DVD as your First Boot Device. Save & Exit From BIOS and Reboot your System.

    Installation Selection
    Select Install or Upgrade to Continue Installation
  2. After Booting from DVD you will get below screen. Select Install or Upgrade an Existing System and press Enter.
  3. If you get following screen wait for some time for Anaconda to take you for the next step.

    Loading...... RHEL6........
    Wait for Few Seconds………
  4. Select your prefered Language from Below Screen. I prefer English is good for all so i have selected English Language for Tutorial Purpose.

    Select Language
    Select Installation Language
  5. Select Keyboard Layout.

    Keyboard Layout
    Select Keyboard Layout
  6. In Following Screen you will able to see 4 Installation Methods, Let me explain Methods here:-
    • Local CD/DVD – It is obvious that If you use CD/DVD media then Choose this option.
    • Hard Drive – Select this if you have dumped your source into any other Linux partition.
    • NFS Directory – Select this If you have shared installation source shared using NFS.
    • URL – Select this if you want to install using FTP or HTTP Source link.

    So For this tutorial and Step by step installation of RHEL 6 we will select Local CD/DVD Installation Method.

    Installation Method
    Select your Installation Method
  7. If you are not sure about your media then Select OK to verify else Select Skip.

    Media Test
    Test your RHEL 6 Media | Red Hat Enterprise Linux 6
  8. If your media is fine till now it will take you to the Graphical
    Installation Screen
    of RHEL 6 Installation. please wait for few minutes
    after getting following screen

    Running Anaconda........
    Running Anaconda…………
  9. Following is the first screen after Getting GUI Installation Wizard Click on NEXT to Continue…

    First Installation Screen
    Click Next to Begin RHEL 6 Installation
  10. Because we are installating Beta Release of Red Hat Enterprise
    Linux you will get warning of pre-release version. Have a look at
    following screen….

    Pre-release Warning
    This is warning because you are installing RHEL 6 Beta…. Pre-release warning
  11. Now, For installating RHEL there is two storage options are available Let me explain bit…..
    • Basic Storage Devices – Select this if you are installating on Local Hard disk or some local Storage
    • Specialized Storage Devices –Β  Select this if you are installing on SAN ( Storage Area Network ) or DASD ( Direct Access Storage Devices)

      Storage Selection
      Select Storage to Install RHEL 6 Beta
  12. Don’t worry if you don’t get following step, because if your Hard disk is blank then only you will get following screen.

    Hard Disk Initialize
    Reinitialize Device……
  13. Set your Hostname here. Remember FQDN hostname is always preferable (i.e. example.tejasbarot.com)

    Configure Hostname
    Configure Hostname
  14. If you want to configure network during installation then click on Configure Network and Configure your Network by Editing Ethernet Cards.

    Configure Network
    Network Configuration During Installation with NetworkManager in RHEL 6
  15. Now It’s time to Select Time Zone.

    Time Zone
    Select Time Zone
  16. Now Set your root Password.

    Root Password
    Set your root password during Installation
  17. Make sure your password is not combination of
    dictionary words other wise you’ll get screen as below.

    Weak Password
    Weak or Dictionary base root Password
  18. Now We reach to the most Important part of any Linux Installation, Its Partition time guys…………Not explaining any option because it is already nicely explained there on screen itself. I prefer Create Custom Layout because i can show you guys how to make partition during installation. If you have windows already installed then please select this option……………………Select Create Custom Layout andΒ  click on NEXT.

    Create Custom Layout
    Select Create Custom Layout to make Partition with our decided partition scheme
  19. I have got blank Hard Disk, So If you have also got Blank Hard Disk then you will get screen like below :-

    Free Space
    There is no partitions so this is the screen…….
  20. Here we’ll create only Three Most required Partitions….. You can create as per your requirement. SoNow Let’s start creating Partitions……..
  21. Let’s create boot partition first. Click on Create -> Select Standard Partition, Enter /boot as Mount Point, Enter Size 500MB, and Keep all information as it is, Click on OK.
    Create partition
    Click on “Create” to Create Standard partition

    Boot Partition
    Creating boot partition…..
  22. Now Let’s create swap partition Click on Create -> Select Standard Partition, Select Swap as File system Type, Enter size 2000 ( I suggest it should be double than RAM) and Keep all information as it is, Click on OK.
    Create partition
    Click on “Create” to Create Standard partition

    Swap Partition
    Creating Swap Partition
  23. Let’s create root partition. Click on Create -> Select Standard Partition, Enter / as Mount Point, Select Fill to maximum allowable size and Keep all information as it is, Click on OK.
    Create partition
    Click on “Create” to Create Standard partition

    Root Partition
    Creating root ( / ) Partition
  24. Now If everything is perfectly fine then you will able to see following screen

    Final Partition
    Final Partition Scheme
  25. This is the screen which is going to Format all your partition which you have created,
    Here if you are not sure then reboot your system without clicking on
    any thing. If you are sure that you want to continue then click on Write Changes to disk.

    Formatting Partitions
    Finally Writing Partition Changes to Disk
  26. Here is the Boot Menu screen. You can set password for Grub here, You can modify booting entry here.

    Booting Menu
    Customize your Grub Menu
  27. Different Kinds of Software packages are availabe so Select as per your requirement and click on NEXT.

    Package Selection
    Select Bunch of Packages which suits to your requirement
  28. If you plan to do customize installation then click on Customize Now and Click NEXT and Select your required packages and then click Next.
    Customize Now
    Customize Packages Now

    Packages Selection
    Select Packages which you want to install and click “Next”
  29. Installation has been started. Just get back and Relax for some time. It will take some time to get installed.

    Installation Started
    Installation of Red Hat Enterprise Linux 6 has started
  30. Congratulations Guys….. Your RHEL 6 is installed…….

    Installation Completed
    Installation Successfully Completed
  31. Grub Screen of Red Hat Enterprise Linux 6 Beta ( RHEL 6)

    Grub of RHEL 6
    RHEL 6 Grub Screen
  32. Wait…………. RHEL 6 Beta is Loading………………………

    Loading RHEL 6......
    Loading RHEL 6 Beta……
  33. Hmmm……. First Boot Instructions…. Just Few Steps and That’s It.
  34. This is the Welcome Message click on Forward

    Welcom Message
    This is welcome message on First Boot
  35. Select Yes, I agree to the License Agreement and Click on Forward

    License Information
    Accept License Agreement
  36. If you have RHN Login then Select Yes Otherwise Select No, I prefer to register at a later time and click on Forward.
    Software Updates
    If you don’t have RHN Login Select “No” and Move “Forward”

    Finish Updates Setup
    Finish Updates Setup
  37. Create Normal User and Click Forward

    Creating User
    Creating Normal User during Installation
  38. Set your Date & Time Here.

    Date & Time
    Set your Date & Time
  39. Enable Kdump if you want to configure otherwise Click on Forward, That’s It.

    Kdump
    Configure KDump
  40. Now It’s your RHEL 6 is installed and running.

Have a Fun with Red Hat Enterprise Linux 6 | RHEL 6 Beta.

Let me have some comment on this guys…………. Waiting for your comments……………..

Enjoy Red Hat Linux πŸ™‚ Enjoy Open Source πŸ™‚

Howto: Install Google Voice and Video Chat on Fedora | RHEL | Linux | RPM-Based System

Hello Guys,

As I have already posted that Google Voice and Video chat is available for Linux but Only for Ubuntu, Today i was googling for installing Google Voice and Video chat on Fedora | RHEL and RPM Based Linux.Β  So I Found 1 very nice howto on google helps itself. A very nice howto which shows us that howto install using DEB file. I am posting that with some modification.

Google Released Official RPM to Install using Official RPM follow this link :- http://www.tejasbarot.com/2010/09/02/install-google-voice-video-chat-using-official-google-rpm-fedora-rhel-linux/

Perform following steps to install Google Voice & Video chat on Fedora | RHEL and RPM Based Linux

1. You need to be root for Doing this. So be as a root

2. Click Here to Download DEB File. Or Execute Below command on Terminal.

# wget -c http://dl.google.com/linux/direct/google-talkplugin_current_i386.deb

3. Move deb file to /tmp directory. Execute below command
# mv google-talkplugin_current.deb /tmp

4. Now Change your Directory to /tmp. Execute cd /tmp

5. Now Execute below command
# ar vx google-talkplugin_current.deb # This command will extract DEB file here.

6. Above command will install drivers, but as we don’t have exact RPM so we have to make link of some library files. Execute below commands
# cd /usr/lib
# ln -s ../../lib/libcrypto.so.1.0.0a libcrypto.so.0.9.8
#
ln -s libssl.so.1.0.0a libssl.so.0.9.8

(non-Fedora distributions, and other versions of Fedora, may have different locations and version numbers for these libraries, but the same basic method should work.)

7. Now Again lets change our directory to /tmp where we have extracted DEB file. Execute command below
# cd /tmp
# tar xvzf data.tar.gz -C /

8. Now change your directory to /opt/google/talkplugin by executing command below
cd /opt/google/talkplugin

9. Type Below command
./GoogleTalkPlugin

If Everything is fine you will able to see two lines as below

./GoogleTalkPlugin: /usr/lib/libssl.so.0.9.8: no version information available (required by ./GoogleTalkPlugin)
./GoogleTalkPlugin: /usr/lib/libcrypto.so.0.9.8: no version information available (required by ./GoogleTalkPlugin)

Above lines are not errors its just warnings so Don’t worry.

By following this howto on some systems plugin will work on firefox and on some plugin will work on Google Chrome. Don’t know the reason but its only like that. Also I don’t say or not any surety that this will works for all.

I want to thank this post for showing a very nice way to install Google Plugin without RPM.

Source link :- http://www.google.co.uk/support/forum/p/chat/thread?tid=273c9ff21a1bbf53&hl=en

Enjoy Linux πŸ™‚ Enjoy Voice & Video Chat on RPM Based Systems πŸ™‚

All comments accepted.

10 Ways that Enterprises use Linux

Hello,

The world’s largest technical support, software and hardware companies use Linux on a daily basis for a variety of tasks and solutions. This post gives you an overview of all the ways in which large companies use Linux. Most don’t use Linux on the desktop but do use it in ways you might expect (and a few you might not expect) a company of that magnitude to use it. They’ve leveraged Linux for some of the most critical workloads and 100% uptime service levels. Welcome to the world of enterprise Linux.

For more visit this link :- http://www.daniweb.com/news/story258647.html

6 of the best media burners for Linux

Introduction

Back in the day, a custom audio CD with the best love songs made a wonderful Valentine’s Day gift. Now she’d hardly be impressed.

You’d need to throw in the holiday videos and make sure it works on the high definition plasma to sweep her off her feet.

That might sound like a lot of work, but it’s a job you can get done with almost any Linux CD/DVD burning app.

That’s because most writing apps are equally capable of putting data on optical media as they are at retrieving it. And some apps don’t just do brute force ripping – they also have decent transcoding abilities and give you quite a bit of control over the end result.

In addition to normal CDs and DVDs, almost all apps can handle rewriteable (RW) and dual-layer double-capacity versions. Although high-capacity discs and their respective Blu-ray and HD DVD drives aren’t very common, if you own one, you can find at least a couple of applications for Linux that will put it to good use.

Since all distros come with a disc burning app, they get a lot of attention to make sure they integrate into their native environment and don’t look out of place. When you put in a blank CD, the burner should pick it up and ask you what kind of data you’d like to burn.

Yet despite all the glitz, the same age-old tools are chugging away at the back-end, giving the front-end apps approximately equal powers. So, how do the various disc burning apps stack up against each other and which one should you trust with your data? Let’s spin ’em up and find out.

To Read more visit this link :- http://www.techradar.com/news/computing/pc/6-of-the-best-media-burners-for-linux-635084