Igor David

AWS fault-tolerant web app with GlusterFS

admin — Sun, 12 May 2013 15:03:30 +0000

Building fault-tolerant and scalable web application is a MUST for every serious business and platform. Here you can find nice overview of techniques to achieve that in AWS.

But since AWS is a platform which allows you to build whatever-you-want on the top of it, some extra work is needed to achieve completely redundant and [...]

NFS AWS howto

admin — Fri, 26 Apr 2013 01:08:54 +0000

So… everyone are speaking about having single storage unit in AWS. That’s a real demand these days, and here is one way of doing that. The answer is – NFS!

So basically, you do the following:

- launch/create VPC

http://docs.aws.amazon.com/AmazonVPC/latest/GettingStartedGuide/ExercisePreqs.html

- create VPC private subnet

http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Scenario2.html

- Launch instance in public subnet, and create NFS [...]

Hand of God

admin — Sun, 07 Apr 2013 22:37:51 +0000

Look at this!

Amazing, I found it just in front of my apartment, attached to old church!

Best Linux movie player

admin — Sun, 03 Mar 2013 23:37:55 +0000

Finally!

I found best Linux (Ubuntu) movie player EVER.

It’s called “smplayer” and is actually a web frontend for famous “mplayer” (command line player).

It has lot of nice features, some are:

- Search automatically for subtitles on opensubtitles.org - Can play a ton of different video types without the need for additional codecs - [...]

Moja omiljena mesta u Beogradu / Favourite places in Belgrade

admin — Wed, 20 Feb 2013 10:20:00 +0000

Hrana, kafane, kafići, klubovi

napomena: nemojte u Beogradu zaustavljati taxi na ulici ili ga uzimati sa lokacija gde ih ima mnogo tipa Autobuska/Železička stanica, Ušće, itd, jer ima mnogo divljaka! Uvek pozvati i naručiti Taxi telefonom!

Znak pitanja kafana Upitnik, ili “?”, je najstarija kafana u Beogradu i stranci obavezno dolaze ovamo. Ulica [...]

mdadm raid configuration

admin — Mon, 04 Feb 2013 12:42:53 +0000

Few steps you need to perform, for example creating Raid1 and preserving it’s creation after server reboot:

# yum install mdadm

Now, first check your devices, for this example we will presume their names are /dev/xvdf and /dev/xvdg (modify this to suit your needs):

# mdadm –create –verbose /dev/md0 –level=1 –raid-devices=2 /dev/xvdf /dev/xvdg

Next, we [...]

Sony Vaio Ubuntu touchpad issue – RESOLVED

admin — Mon, 14 Jan 2013 23:12:03 +0000

I have installed Ubuntu 11 to my Sony Vaio laptop, but mouse touchpad was working very bad (i.e. was not working).

Solution:

First, check your Sony version, just to be sure:

# dmidecode -s system-product-name

After that, tell Ubuntu to use your touchpad as mouse PS2:

# echo options psmouse proto=imps | tee -a /etc/modprobe.d/psmouse.conf; [...]

Couldn’t untar /root/.cpan/ – RESOLVED

admin — Wed, 02 Jan 2013 22:07:53 +0000

Recently I wanted to install some Perl modules for mail server vacation.pl script, but it was failing do to so:

# perl -MCPAN -e shell # cpan> install DBD::mysql … Uncompressed /root/.cpan/sources/authors/id/C/CA/CAPTTOFU/DBD-mysql-4.022.tar.gz successfully Using Tar:/bin/tar xvf /root/.cpan/sources/authors/id/C/CA/CAPTTOFU/DBD-mysql-4.022.tar: Couldn’t untar /root/.cpan/sources/authors/id/C/CA/CAPTTOFU/DBD-mysql-4.022.tar

Hmm, but /bin/tar exists:

# which tar /bin/tar

So what is wrong?

The solution is [...]

Coca Cola devil

admin — Sat, 29 Dec 2012 20:06:17 +0000

Isn’t it obviously?

Modern society

admin — Fri, 28 Dec 2012 10:07:00 +0000