Thursday, November 11, 2010

no subject - Redhat

it is amazing to know, how pathetic could be a company like Redhat, i received an email today regarding RHCE certification, the two points really made me write this blog post are,

1. email without subject.
2. the paragraph where the made an excuse of verification system error!

here we go:

Hello Nayyar Ahmad:

Red Hat has announced general availability of Red Hat Enterprise
Linux 6. Your Red Hat Enterprise Linux 4 Red Hat Certified
Engineer (RHCE) certification will be considered non-current
on January 9, 2011 per the re-certification policy. It will
still be possible to verify your certification at

Unfortunately, there is a minor bug in the page such that your
certification will report "Current until " instead of
simply "Current". This issue will be resolved by the end of
the month.

During the time between now and January 9, 2011 you will remain
eligible to take Red Hat Certificate of Expertise Exams.
In order to remain eligible after that date you will need
to re-certify. Discounts are available in most areas for

If you are a Red Hat Certified Architect (RHCA), Red Hat
Certified Security Specialist (RHCSS), or Red Hat Certified
Datacenter Specialist (RHCDS), you will need to re-certify
to retain those titles after January 9. You will retain all
Certificates of Expertise you have earned in either case.
If you choose to re-certify, we will apply previously-earned
Certificates of Expertise to your new RHCE and your status as
an RHCA, RHCSS or RHCDS will be restored.

For RHCEs earned under Red Hat Enterprise Linux 6 and later,
a new re-certification policy will apply. This new policy only
applies to new certifications and will provide more options
for remaining current.

Please direct questions or comments to the certification team at

Best wishes!
Red Hat Certification



Monday, September 27, 2010

Google's shell for linux geeks

i was reading my blogs statistics and found a very strange link "GOOSH.ORG" it initially sound to me some Indian origin name, so i thought some Indian fellow has linked my blog at his site, out of my curiosity i clicked at link and what i saw was a Linux/Unix shell :D it was really strange feeling, for an instance i thought i somehow hacked buddy's server, but quickly reading the login screen banner came to know that its a google's open source project under GPL, developed by "Stefan Grothkopp".

i spent about 5 minutes on and found it a refresher, it can ofcourse become geek's first place to start with google in future... i am impressed with Stefan idea and for sure his efforts!

hope to see this project going on well in future.


Thursday, September 16, 2010

Remove specific emails from Inbox at MS Exchange server.

well, you know me, i feel sorry for you, i know you wouldn't like me to write about bill gate's shits but i have no choice, i have to dump it somewhere...well, yesterday an acting Director at our office, by mistake sent an email to almost all technical team leads with attachment that had salaries of all employees, even i received it :p

soon after his email, he realized the bomb he exploded has started effecting!

He ran to my team lead and asked to clear this shit, anyhow, i was initially reluctant, even i told my team lead, that if it was Linux Mail Server, i would have done it... but MS Exchange NOWAY ;) anyhow later just to give it a try i started research and found a very nice article based on (EXMERGE - that is built by MS as a part of Exchange toolkit) that help me to accomplish the task, i success fully deleted that emails from all inbox at Exchange server.


Tuesday, August 31, 2010

JBoss Tuning Secrets

I know you are really pissed off with your JBoss performance, i am always having same feelings, even my Boss is always crying in his chair..."please please bring the fuc*ing App Server back!!!"

anyhow, the task is not easy, to tune JBoss you have to do research on your environment, there is no direct steps or command one can recommend you!

though i have attached a pdf here, it is the best article i could find, and ofcourse with little intelligence you can make JBoss optimum performance.

i am really thankful to the writer of this article, he did great job!


Wednesday, August 18, 2010

Saudis are busy!

I have been wondering for years to figure out, what Saudis are doing... i always thought they are doing nothing, just earning money from their tourist industry (HAJJ & UMRAH) or sleeping at canals of God gifted petroleum reserves... but i was wrong, no believe me... i was seriously wrong! they are really busy nation, exploring new era of FATWAS for rest of the muslims world... i was before completely convense that the most extreamist thoughts has been injected by saudi's to muslim world, just to keep everybody intact to their tourist industry... but NO, i was really wrong!

today i received an email from a friend, with following attachment. i have nothing to say after it!

please let me know, how far i went in my wrong perception about them?


Monday, August 16, 2010

forward dns, solved huge puzzle for me

since i joined sysadmin team at our DR site, i found SSH delay on two of our test environments, the major cause was ssh version in Solaris, that force to resolve client hostname, but at DR site the ssh client's machines have different DNS server then test environment, even both test environment has their own DNS server.

initially i was working on DNS replication, but then later due to some security policies we decided to avoid DNS replication...what happen yesterday that, our official hardware support engineer came to work on a server, that lost storage connection, during some free time, i discussed this DNS & ssh delay issue, he also gave me replication idea, but during conversation, due to his poor English he used replication as forward and here i got the idea, i suddenly started laughing that how come i miss forward dns option :) so simple and easy.

i edited /etc/named.conf of my both test environment DNS server. i.e.

options {
directory “/var/named”;
forwarders { IP ADDRESS OF SSH's CLIENTs DNS ; } ;
forward only;

just a restart of DNS service and it started working like a dream :p


Thursday, August 12, 2010

error: adduser: user exists, at samba & winbind server.

One of our colleague reported "Acess Denied" during SSH login to our fileserver i.e. configured with Samba & Winbind under Centos. During the troubleshooting process i decided to remove and add the user again, after removing, when i tried to create the same user, i was getting error "adduser: user exists"... after a research on google and reading samba official manual, i discovered i.e.

"If winbindd is not running, smbd (which calls winbindd) will fall back to using purely local information from /etc/passwd and /etc/group and no dynamic mapping will be used."

so here i got the clue and created user after stoping winbind daemom. i.e.

step 1: # service winbind stop

step 2: # useradd -u 786 -g 786 -m


Wednesday, June 30, 2010

Spanish win's saga at Maputo

it was over spoken Portugal team, who last night kicked out from FIFA world cup second round, since i saw Spanish players in this season got impressed and continued by their yesterday performance.

i recorded a small video of Spanish supporters from my flat window, it was a bit dark, though the sensation is awesome ;)


Monday, June 28, 2010

step by step, modifying forward DNS in Endian Firewall machine

if you are wondering where the hell your forward dns entry is located in Endian Firewall machine?

then you are stuck in my shoes ;)

do the following, as per Endian Firewall defaults:

1. cp /etc/dnsmasq/resolv.conf /etc/dnsmasq/resolv.conf.old
2. vi /etc/dnsmasq/resolv.conf

CHANGE THE nameserver value.

3. cd /etc/init.d/
4. ./dnsmasq reload
5. ./dnsmasq restart


Monday, June 21, 2010

step by step, disk mirroring with Solaris Volume Manager

ok...ok... i know you got worried about my blog! it has been six months i am unable to provide a single piece of blog to read... ok, i promise i will try to get regular!

below is the link for the step by step you were looking for, there is'nt any comment/detail in this howto, from where you can get an idea how busy i am :( , but you keep reading the howto, and keeping asking me for help, i will keep writing you my response :*