RHEL 7.1 officially released.

Today, Red Hat announces the official release of RHEL 7.1. To know more about this new version you can read a summary of the RHEL 7.1 changes or the RHEL 7.1 Release Notes.

In addition, Red Hat is also releasing its RHEL 7 Atomic Host, an operating system optimized for running the next generation of applications with Linux containers.

Finally, for the RHCE certification candidate it’s an interesting day: Red Hat today delivers a bunch of software updates. One of them fixes some embarassing bugs preventing Samba+Kerberos configurations from working. Hopefully, these updates will be available soon in CentOS 7.

Posted in RHEL7

Website news.

In order to make mobile connection easier the website theme has been changed.
It should now be handier to access pages during a trip.

In addition, there are two new quiz: one for the RHCSA 7 exam and one for the RHCE 7 exam.

Braindumps are a pretty stupid way to get prepared for the hands-on RHCSA/RHCE exams, they don’t teach you anything about understanding or reasoning. However, learning by heart specific command syntax or tricks can be very useful to remember key points not only during the exams, but also after.

Each of this quiz contains more than 30 questions and more will be added in the future.

Enjoy!

Posted in RHEL7

Minimal Image Survival Guide.

Every day I can hear someone saying: the ifconfig command has been removed from the RHEL 7/CentOS 7 distribution and nobody told me anything!
Invariably, it’s about a RHEL/CentOS minimal installation.
To alleviate this unpleasant situation, there is now a minimal image survival guide.
Next time you happen to hear someone ranting about minimal installation, forward him this survival guide, it will be your good deed of the day!

Posted in RHEL7

Final call for RHCSA 6 & RHCE 6 exams.

Just to remind you that you have until February 28 to buy your voucher for the RHCSA 6 or RHCE 6 exams. Then, you will have 1 year from the purchase date to take the exams.
After February 28, you will have to learn RHEL 7.

Note: If you’ve got a valid RHCSA 6 certification, you can already take the RHCE 7 exam.

Source: https://www.facebook.com/RedHatCertified.

Posted in RHEL6

Linux Foundation exam updates.

The Linux Foundation is making some adjustments to its LFCS and LFCE exams starting on March 1, 2015:

  • in the LFCS exam objectives, RAID is replaced with LVM,
  • in the LFCS exam, the pass mark becomes 74% (instead of 65%),
  • in the LFCE exam, the pass mark is now 72% (instead of 65%),
  • some updates to security protocols occur,
  • the exam interface’s got some improvements.

Perhaps in response to the Red Hat RHCE 7 exam hardening, the Linux Foundation makes its exams more difficult to get by raising their pass mark: an exam too easy to pass doesn’t get good publicity nor doesn’t trigger good training sales.

Sources: Linux Foundation LFCS & LFCE pages.

Posted in RHEL6

Postfix tips.

When dealing with SMTP for the RHCE or LFCE exams, there are some tips that can be very useful to know about Postfix.

First, you’ve got a very interesting website at http://www.postfix.org/postfix-manuals.html.

Then, during the exam, you can get some configuration examples in the /usr/share/doc/postfix-2.10.1/README_FILES directory for RHEL 7 (-/postfix-2.6.6/README_FILES for RHEL 6) in the BASIC_CONFIGURATION_README and STANDARD_CONFIGURATION_README files. This documentation comes with the postfix package.

In addition, the /etc/postfix/main.cf file, the main configuration file, is fully documented. This will help you decide what parameter to change.

But there are more to know!
You’ve got the choice to edit the /etc/postfix/main.cf file or to use the very powerful postconf command. Instead of wasting time, searching for the Postfix parameter in the main.cf file, if you know its name, you can directly assign a value to it or get its value:

# postconf -e 'relayhost=[192.168.1.1]'
# postconf relayhost
relayhost = [192.168.1.1]

This is not only very efficient, but the configuration is also definitively written in the main.cf file!
You can restart the Postfix processes or even reboot the server, it’s still there.

Also, by using the relayhost = [192.168.1.1] syntax during your test, you can avoid the use of a master DNS server and its associated MX record (MaileXchange), which can be very handy.

Finally, at any time, you can check the syntax of the main.cf file with the postfix check command.
You can also get the list of the parameters with non-default assigned values with the postconf -n command.

In conclusion, Postfix is really a powerful and well designed tool.

Posted in RHEL7

Happy New Year!

I wish you a happy new year 2015!

Posted in Uncategorized

Merry Christmas!

I wish you a Merry Christmas!

Posted in Uncategorized

RHEL 7.1 Beta just released.

One week after the CentOS 7 rolling builds announcement, one day after the Fedora 21 release, it’s now the RHEL 7.1 Beta that is unveiled!

This minor release brings many new improvements.
Lots of them are summed up in the article about the RHEL 7.1 changes.

Happy reading!

Posted in RHEL7

RHCSA & RHCE 6 exams availability.

Yesterday, Red Hat published a post concerning RHCSA & RHCE 6 exams availability.

According to this post, candidates have one year to take RHCSA 6 or RHCE 6 exams as Individual Exam Sessions under the condition that they purchase the vouncher before February 28, 2015.

Posted in RHEL6

RHCSA7: Task of the day

Allowed time: 10 minutes.
Boot and change the root password before the end of the boot process.

RHCE7: Task of the day

Allowed time: 10 minutes.
Set up a httpd virtual server called "dummy" with DocumentRoot assigned to /opt.

Poll for favorite book

What is your favorite book to prepare RHCSA & RHCE exams?

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Poll for most difficult topic

What do you think is the most difficult topic?

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