Category: Tech’n’Social


Hmmm let me wrote a technical post 🙂

This morning a friend of mine called me cause he was experiencing some issues on his linux server, and q-mail. Mails queue was growing and strange errors started appearing into logs.
Issue identified: all mails to gmail accounts bounced with error “System resources temporarily unavailable. (#4.3.0) I’m not going to try again; this message has been in the queue too long.”

The issue was related to the module IPV6 not properly loaded (or not loaded at all) on the RHEL kernel (v 5.6, with parallels plesk 10.x).

Below the fix (hope useful for someone else and many thanks to Bono). It seems the first IPV6 issue I’ve encountered 🙂

Step-by-step fix:

Enable IPV6 in RHEL:
Add the below entry in the modprobe.conf file
(use nano or vi, as you prefer)

# nano /etc/modprobe.conf

alias net-pf-10 ipv6
# alias ipv6 off
# options ipv6 disable=1

Change the “ NETWORKING_IPV6” parameter value to yes in the netwok file.

# nano /etc/sysconfig/network
NETWORKING_IPV6=yes

type this command and add to the end of the file these two lines.
# nano /etc/sysconfig/network-scripts/ifcfg-eth0
IPV6INIT=yes # Enables IPv6 addressing on interface.
IPV6_AUTOCONF=yes # Enables EUI 64 auto-addressing.

After that, a machine reboot was needed. And then… EUREKA… inet6 address was set (and shown in ifconfig) and q-mail queue started decreasing.

Some useful hints:
to see the q-mail queue lenght via ssh:
# /var/qmail/bin/qmail-qstat
to force qmail to process the queue:
# kill -ALRM `ps ax | grep qmail-send | grep -v grep | awk '{print $1}'`

(we experiencing that the qmail queue could take a long time to purge the “blocked-in-queue” message, even if new message are sent immediately)

More info here:
http://forum.parallels.com/pda/index.php/t-110308.html
http://kb.parallels.com/en/169

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Great article (in italian), written by Guido Guerzoni (read the article ) with a funny story:

“come le api operaie, queste imprese si fanno un culo a paiolo, vivono una stagione e muoiono di fatica: per produrre un chilogrammo di miele le api devono raccogliere circa 3 chilogrammi di nettare, effettuando circa 60.000 voli, in ognuno dei quali devono suggere circa 100 fiori, coprendo in media 2,5 chilometri a 24 chilometri orari. Pertanto, per produrre un chilogrammo di miele devono sucarsi 6.000.000 di fiori e percorrere 150.000 chilometri, pari a 3,75 giri del mondo. ”

Amazing, but a true story 😐
-L

Job interview questions

Interesting questions ideas for recruitment process 🙂

(from “The 9 Oddest Job Interview Questions Asked at Tech Companies in 2011”  http://mashable.com/2011/12/27/glassdoor-interview-questions-2011/ )

“How many people are using Facebook in San Francisco at 2:30 p.m. on a Friday?” — Asked at Google, Vendor Relations Manager candidate

“You’re in a row boat, which is in a large tank filled with water. You have an anchor on board, which you throw overboard (the chain is long enough so the anchor rests completely on the bottom of the tank). Does the water level in the tank rise or fall?” — Asked at Tesla Motors, Mechanical Engineer candidate

“Please spell ‘diverticulitis’.” — Asked at EMSI Engineering, Account Manager candidate

“You have a bouquet of flowers. All but two are roses, all but two are daisies, and all but two are tulips. How many flowers do you have?” — Asked at Epic Systems, Corporation Project Manager/Implementation Consultant candidate

“If you were a Microsoft Office program, which one would you be?” — Asked at Summit Racing Equipment, Ecommerce candidate

Social path

Find the right path to be right-social

LOL

Chrome store…

Browsing chrome store…

some funny apps and some cool such as autcadWS…

https://chrome.google.com/webstore

Funny t-shirt

http://yfrog.com/189v6pbj

LOOOOOL

 

 

 

 

Google acquires zagat, one of the most well-known names in restaurant reviews and small guidebooks.

Welcome to old-economy and paper-smell maket 🙂

 

http://techcrunch.com/2011/09/08/google-acquires-zagat-to-flesh-out-local-ratings/

Italian article regarding Moviri Contentwise and Bookrepublic:

http://affaritaliani.libero.it/culturaspettacoli/e_book_bookrepublic_punta_sui_consigli_correlati240811.html

 

(bookrepublic blog: http://blog.bookrepublic.it/press/bookepublic-contentwise/ )

Okay HP, Let’s Make Some Lemonade (From techcrunch.com )

http://techcrunch.com/2011/08/18/okay-hp-lets-make-some-lemonade/

 

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