Lukáš Zapletal

Fedora 16 hidden feature - autojump

2012-02-21T23:28:00.001+01:00

While I was correcting bad formatting (thank you Google/Blogger) for my previous post about Apple and LLVM vs GCC, I realized I did not write about "new" Fedora 16 feature. Well, it's just a new package. But it rocks! Autojump is a small utility...

[ Pro celý zápisek navštivte můj blog... ]

The Apple way - LLVM

2012-02-20T19:00:00.000+01:00

There is a very interesting discussion on the Fedora devel mailing list about LLVM and GCC compilators started with short reaction on Apple's migration to LLVM in their Xcode development environment. The original author asks if llvm is ready to do...

[ Pro celý zápisek navštivte můj blog... ]

Peek into your Ruby app with SystemTap

2012-02-02T19:10:00.001+01:00

I already wrote about using SystemTap with Ruby. Today I want to extend the last example I linked at the very end of my article. It's a nice example script of Ruby "top" utility. Today I was investigating our Katello unit test codebase. We have...

[ Pro celý zápisek navštivte můj blog... ]

Lazy logger levels

2012-01-30T11:01:00.000+01:00

Developers are lazy guys. They tend to make their lifes easier. I do it everyday. I never miss an opportunity to write a shell script or a shell bit instead of renaming 10+ files. Even when I know it will take exactly the same time as for the manual...

[ Pro celý zápisek navštivte můj blog... ]

Probing Ruby apps with SystemTap in RHEL

2012-01-05T20:57:00.001+01:00

There is one small'n'hidden feature of RHEL 6.2 that popped up recently as an enhancement errata (RHSA-2011-1581). With this update, SystemTap probes have been added to the Ruby package. I was waiting for this feature, because at the time I was...

[ Pro celý zápisek navštivte můj blog... ]

First look at ThinkPad X220

2012-01-04T00:17:00.000+01:00

As a ThinkPad X201 user, I was more than happy to check out new X220 model. At the first sitght it is still ThinkPad X-series. Similar size, feeling, quality. I am comparing my good-old X201 with this model 287-2SG. Pros The lid has no lock....

[ Pro celý zápisek navštivte můj blog... ]

How to get rid of GUID Partition Table

2011-12-29T22:12:00.003+01:00

I made a default installation of Fedora 16 on my testing machine the other day and Anaconda has installed GPT on the hard drive. Now, I want to fall back to MBR. Wildly used tool fdisk was showing a message Warning!! Unsupported GPT (GUID...

[ Pro celý zápisek navštivte můj blog... ]

Disable animations Gnome Shell plugin now as extension

2011-12-29T17:02:00.000+01:00

Heya, you may already noticed the new site extensions.gnome.org for Gnome Shell extensions. It is possible to install extensions with a single mouse click with the latest and greatest version. I just put my Disable Window Animations extensions...

[ Pro celý zápisek navštivte můj blog... ]

Setting hostname properly in Fedora and Red Hat

2011-12-07T11:37:00.001+01:00

I have been playing with hostnames yesterday and I had to stop for a while today doing a little research. Setting up a hostname is not a hard task, in Fedora and Red Hat it's a matter of editing one file: # grep HOSTNAME...

[ Pro celý zápisek navštivte můj blog... ]

Gpaste terminal integration

2011-12-02T08:30:00.000+01:00

Sometimes I need to copy whole output of some program into my clipboard or selection. I use nice Gnome Shell extension called Gpaste (packages gpaste and gnome-shell-extension-gpaste in Fedora and Red Hats). It is a nice daemon, command line tool...

[ Pro celý zápisek navštivte můj blog... ]

Git's crying Patch format detection failed

2011-11-30T17:04:00.001+01:00

If you get the following error message while applying git patch: $ git am /path/to/0001-My-awesome-change.patch Patch format detection failed. It means that the patch was not generated with git format-patch and transmitted correctly. Either...

[ Pro celý zápisek navštivte můj blog... ]

Anatomy of Ruby Exception

2011-11-28T20:30:00.000+01:00

Today I was trying to find how to properly override Ruby standard Exception. To my surprise, I was not able to find any tutorial or even paragraph about it. No recommendations, no design patterns. Everything was the same: class MyError <...

[ Pro celý zápisek navštivte můj blog... ]

Cloud want's you!

2011-11-27T19:48:00.001+01:00

My team is looking for skilled Ruby or Python or Java developers. We are also seeking graduates with Linux knowledge. Many open jobs for open-source projects that has something to do with cloud. Bryan Kearney and Angus Thomas showing...

[ Pro celý zápisek navštivte můj blog... ]

Setup mirrors properly in Fedora 16

2011-11-24T18:00:00.000+01:00

Fedora 16 (and older versions) comes already preconfigured so yum downloads packages from nearest mirror. That is cool, but once you are using proxy for speeding up you will be always re-downloading packages again, because mirrors are picked up in a...

[ Pro celý zápisek navštivte můj blog... ]

How to install Lingea Lexicon 5 in Fedora 16

2011-11-23T22:00:00.000+01:00

Lingea Lexicon is the best dictionary out there. And not only for linux. It has very fast fuzzy search, decent interface and high-quality corpus for many languages. Where other dictionaries fail, this one is returning correct answers. I am happy...

[ Pro celý zápisek navštivte můj blog... ]

Quick provision script now on github.com

2011-11-21T20:30:00.000+01:00

Snap-guest is a simple script for creating copy-on-write QEMU/KVM guests. I have put it on the github.com recently. Patches are welcome. Features creates qcow2 image based on different one generates MAC address out of hostname modifies...

[ Pro celý zápisek navštivte můj blog... ]

Start using Ruby RVM on RHEL 6

2011-11-12T22:04:00.001+01:00

Rubyists know RVM very well, I tried it several times. This time I am doing on RHEL 6. The installation instructions from the RVM site differs slightly when applied on a RHEL box, so here is my tutorial. I extended the process a bit with some...

[ Pro celý zápisek navštivte můj blog... ]

How did I tune my Verne

2011-11-10T21:08:00.001+01:00

So I am basically done with tuning my new installtion of Fedora 16 Verne. Let me summarize this a little bit over here now. Gnome Shell Extensions Before I can start I have to bind F1-F4 keys to swtiching workspaces one to four. It's pretty...

[ Pro celý zápisek navštivte můj blog... ]

New postgresql-setup command in Fedora 16

2011-11-05T13:06:00.000+01:00

Faced this error in Fedora 16? # service postgresql start Redirecting to /bin/systemctl start postgresql.service Job failed. See system logs and 'systemctl status' for details. If you work with PostgreSQL and execute service...

[ Pro celý zápisek navštivte můj blog... ]

Reformat vs reindent in Vim

2011-10-27T17:27:00.002+02:00

When I see questions about Vim and reformatting and reindenting, I usually feel confusion. But it is pretty easy. Reindenting, done with = key, is a process of shifting line indetation without inserting any line ends - no hard wrapping. Simply put,...

[ Pro celý zápisek navštivte můj blog... ]

How to easily mount ISO files for Apache

2011-10-25T11:43:00.004+02:00

I play with yum repositories and ISO files very often, therefore it is vital to have such files and directories avaiable via local Apache httpd. I had this idea of mounting ISO files into directories and using these as yum repositories. I leveraged...

[ Pro celý zápisek navštivte můj blog... ]

Rerouted to Atlanta

2011-10-17T09:17:00.003+02:00

My flight to Raleigh last Sunday was pretty long, like 24 hours in a row. I had to stay more than five hours at JFK Airport in New York, but I eventually survived. At the end of the day it was nothing compared to my return trip though. Read on. My...

[ Pro celý zápisek navštivte můj blog... ]

Help us testing Fedora 16

2011-10-05T14:39:00.003+02:00

Fedora 16 Beta is out and you can help us with testing. Download installation media, live CD or custom spins and report all issues to our Bugzilla. One tiny bugzilla can change much!

[ Pro celý zápisek navštivte můj blog... ]

Android on Acer Aspire One

2011-09-16T23:44:00.001+02:00

My mum bought a mowing machine few ears ago in Mountfield stores and they gave her Acer Aspire One netbook. Yeah for free - special action. But this is extraordinary piece of junk hardware - Atom CPU, 1 GB RAM, 1024×600 LCD screen and internal 16 GB...

[ Pro celý zápisek navštivte můj blog... ]

Configure Red Hat or Fedora as a guest template

2011-08-30T20:41:00.002+02:00

I have several tips how to configure Red Hat Enterprise Linux or Fedora as a guest template. That it an image used for fast provisioning of systems. My tips works with RHEL virtualization, RHEV hypervisor or any other virtualization...

[ Pro celý zápisek navštivte můj blog... ]