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Expand Up @@ -91,6 +91,10 @@ <h1>Archives for atodorov.org</h1>
<div class="row">
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<dl>
<dt>Wed 05 April 2017</dt>
<dd><a href="http://atodorov.org/blog/2017/04/05/mutation-testing-vs-coverage-pt-2/">Mutation Testing vs. Coverage, Pt. 2</a></dd>
<dt>Tue 04 April 2017</dt>
<dd><a href="http://atodorov.org/blog/2017/04/04/article-about-nitrate-in-methods-tools/">Article about Nitrate in Methods &amp; Tools</a></dd>
<dt>Sat 01 April 2017</dt>
<dd><a href="http://atodorov.org/blog/2017/04/01/building-cardboard-robots/">Building cardboard robots</a></dd>
<dt>Fri 13 January 2017</dt>
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Expand Up @@ -96,6 +96,61 @@ <h1>Articles by Alexander Todorov</h1>
<div class="container">
<div class="row">
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<div class="post-preview">
<a href="http://atodorov.org/blog/2013/09/14/upcoming-talk-fedora-test-days-in-sofia/" rel="bookmark" title="Permalink to Upcoming Talk: Fedora Test Days in Sofia">
<h2 class="post-title">
Upcoming Talk: Fedora Test Days in Sofia
</h2>
</a>
<p>On September 28th I will be giving a short talk about
<a href="https://fedoraproject.org/wiki/QA/Test_Days">Fedora Test Days</a> at the regular
Linux for Bulgarians
<a href="http://www.linux-bg.org/cgi-bin/y/index.pl?page=news&amp;key=459487176">conference</a>.
I will explain what these are and how one can participate. I will also announce
my plans and schedule to organize some
<a href="https://fedoraproject.org/wiki/QA/Fedora_20_test_days">Fedora 20 test days</a>
locally in Sofia. If you are a fan of Fedora and want to file bugs and kick
some developers' ass this is the way to do it!</p>
<p>Other talks include Alexander Shopov's „Oracle's take on NoSQL“ which I wanted
to hear since this summer and TBA talks about MicroTik routers.</p>
<p>The conference will take place on September 28th at the French Institute at
Sofia University
(see <a href="http://conf.linux-bg.org/wp-content/uploads/2009/12/su-2.png">map</a>).
It starts at 13:00 and my talk should be at the beginning. See you there!</p>
<p>PS: this post was initially written on my <a href="http://amzn.to/12y4ewJ">BlackBerry Z10</a>
with Penzus Editor - another small step in
<a href="/blog/2013/08/01/laptop-vs-smartphone-part-one/">retiring my laptop</a>.</p>
<p class="post-meta">Posted by
<a href="http://atodorov.org/author/alexander-todorov.html">Alexander Todorov</a>
on Sat 14 September 2013
</p>
<p>There are <a href="http://atodorov.org/blog/2013/09/14/upcoming-talk-fedora-test-days-in-sofia/#disqus_thread">comments</a>.</p> </div>
<div class="post-preview">
<a href="http://atodorov.org/blog/2013/09/02/bug-analysis-of-rhbz-1337/" rel="bookmark" title="Permalink to Bug Analysis Of RHBZ #1337">
<h2 class="post-title">
Bug Analysis Of RHBZ #1337
</h2>
</a>
<p>In my <a href="/blog/2013/08/23/red-hats-ebugzilla-hits-one-million-bugs/">previous post</a>
I asked the readers of this blog to pick a bug number from Red Hat's Bugzilla
so I can analyze it later.</p>
<p><a href="http://radorado.me">Radoslav Georgiev</a> decided to step up and
selected the <a href="https://en.wikipedia.org/wiki/Leet">Leet</a> bug
<a href="https://bugzilla.redhat.com/show_bug.cgi?id=1337">https://bugzilla.redhat.com/show_bug.cgi?id=1337</a></p>
<p>This is a rather old bug against kernel, in particular
against the token ring driver. There isn't much info on the bug but it seems
the issue is hardware dependent and doesn't reproduce reliably.</p>
<p>Looking at the bug status and history it looks like it was closed without
fixing it. Most likely the reason for this was there was no hardware
to test, bug was not reproduced and no customers were seeing the issue or
were willing to test and work with devel!</p>
<p>If you'd like to see my comments on other interesting bugs just post a link
to them in the comments section.</p>
<p class="post-meta">Posted by
<a href="http://atodorov.org/author/alexander-todorov.html">Alexander Todorov</a>
on Mon 02 September 2013
</p>
<p>There are <a href="http://atodorov.org/blog/2013/09/02/bug-analysis-of-rhbz-1337/#disqus_thread">comments</a>.</p> </div>
<div class="post-preview">
<a href="http://atodorov.org/blog/2013/08/23/red-hats-bugzilla-hits-one-million-bugs/" rel="bookmark" title="Permalink to Red Hat's Bugzilla Hits One Million Bugs">
<h2 class="post-title">
Expand Down Expand Up @@ -1164,122 +1219,6 @@ <h2 class="post-title">
on Fri 19 July 2013
</p>
<p>There are <a href="http://atodorov.org/blog/2013/07/19/ssh-from-linux-to-blackberry-z10/#disqus_thread">comments</a>.</p> </div>
<div class="post-preview">
<a href="http://atodorov.org/blog/2013/07/18/git-history-stats-and-project-cost-estimation/" rel="bookmark" title="Permalink to git History Stats and Project Cost Estimation">
<h2 class="post-title">
git History Stats and Project Cost Estimation
</h2>
</a>
<p>How do you generate useful stats from a git repo? In particular how do you
calculate the monetary cost of development effort behind that git repo?
I've found the <a href="https://github.com/hoxu/gitstats">gitstats</a> project which
helped me answer the above question. </p>
<p>Git clone the repo and make sure you
have Python and Gnuplot installed. <code>gitstat</code> will generate html files and
graphics from your git history. </p>
<p>In my case I only needed to know how long it took for a project to be developed.
It turned out that around 56% of the days since day one were active and there were
an average of 8,5 commits per active day in the repo.</p>
<p>I took the number of active days and multiplied by an average daily
wage to come up with a real number. This is what I consider to be the cost to
develop the software from scratch. This is overly simplified, but serves my
needs to establish some base line.</p>
<p>There's the <a href="https://en.wikipedia.org/wiki/COCOMO">COCOMO</a> method which is probably
more accurate but I didn't find any usable online COCOMO calculator.</p>
<p class="post-meta">Posted by
<a href="http://atodorov.org/author/alexander-todorov.html">Alexander Todorov</a>
on Thu 18 July 2013
</p>
<p>There are <a href="http://atodorov.org/blog/2013/07/18/git-history-stats-and-project-cost-estimation/#disqus_thread">comments</a>.</p> </div>
<div class="post-preview">
<a href="http://atodorov.org/blog/2013/07/17/exploring-blackberry-10-nmap/" rel="bookmark" title="Permalink to Exploring BlackBerry 10 - nmap">
<h2 class="post-title">
Exploring BlackBerry 10 - nmap
</h2>
</a>
<p>This is the first post in upcoming series while I explore my
<a href="http://amzn.to/12y4ewJ">BlackBerry Z10</a> device and figure out what's on it.</p>
<p>First configure Z10 for
<a href="/blog/2013/07/17/tip-how-to-enable-usb-networking-between-blackberry-z10-and-red-hat-enterprise-linux-6/">USB networking</a>.
Then from <code>Settings - Security and Privacey - Development Mode</code> turn
<code>Use Development Mode</code> to <code>On</code>.
From my Linux box I run nmap against the usb (169.254.0.1) and
wi-fi (192.168.0.100) addresses of Z10:</p>
<div class="highlight"><pre><span class="nv">$ </span>nmap 169.254.0.1

Starting Nmap 5.51 <span class="o">(</span> http://nmap.org <span class="o">)</span> at 2013-07-17 23:03 EEST
Nmap scan report <span class="k">for</span> 169.254.0.1
Host is up <span class="o">(</span>0.00087s latency<span class="o">)</span>.
Not shown: <span class="m">994</span> closed ports
PORT STATE SERVICE
80/tcp open http
139/tcp open netbios-ssn
443/tcp open https
445/tcp open microsoft-ds
1111/tcp filtered lmsocialserver
8443/tcp open https-alt

Nmap <span class="k">done</span>: <span class="m">1</span> IP address <span class="o">(</span><span class="m">1</span> host up<span class="o">)</span> scanned in 21.41 seconds


<span class="nv">$ </span>nmap 192.168.0.100

Starting Nmap 5.51 <span class="o">(</span> http://nmap.org <span class="o">)</span> at 2013-07-17 23:04 EEST
Nmap scan report <span class="k">for</span> 192.168.0.100
Host is up <span class="o">(</span>0.0035s latency<span class="o">)</span>.
Not shown: <span class="m">998</span> closed ports
PORT STATE SERVICE
443/tcp open https
1111/tcp filtered lmsocialserver

Nmap <span class="k">done</span>: <span class="m">1</span> IP address <span class="o">(</span><span class="m">1</span> host up<span class="o">)</span> scanned in 15.64 seconds
</pre></div>


<p>Firefox says the certificate used for https is invalid:</p>
<div class="highlight"><pre> The certificate is not trusted because it is self-signed.
The certificate is only valid for PlayBook: 1c:69:a5:d0:10:cd
</pre></div>


<p><code>1c:69:a5:d0:10:cd</code> is the wi-fi interface MAC address.
All the http ports produce a 404 with <code>index.html</code> not found!</p>
<p>Trying some UDP scan:</p>
<div class="highlight"><pre><span class="c"># nmap -sU 169.254.0.1</span>

Starting Nmap 5.51 <span class="o">(</span> http://nmap.org <span class="o">)</span> at 2013-07-17 23:32 EEST
Nmap scan report <span class="k">for</span> 169.254.0.1
Host is up <span class="o">(</span>0.00075s latency<span class="o">)</span>.
Not shown: <span class="m">995</span> closed ports
PORT STATE SERVICE
67/udp open<span class="p">|</span>filtered dhcps
68/udp open<span class="p">|</span>filtered dhcpc
137/udp open netbios-ns
138/udp open<span class="p">|</span>filtered netbios-dgm
5353/udp open zeroconf
MAC Address: 1E:69:A5:D0:10:CD <span class="o">(</span>Unknown<span class="o">)</span>

<span class="c"># nmap -sU 192.168.0.100</span>

Starting Nmap 5.51 <span class="o">(</span> http://nmap.org <span class="o">)</span> at 2013-07-17 23:33 EEST
Nmap scan report <span class="k">for</span> 192.168.0.100
Host is up <span class="o">(</span>0.065s latency<span class="o">)</span>.
Not shown: <span class="m">995</span> closed ports
PORT STATE SERVICE
67/udp open<span class="p">|</span>filtered dhcps
68/udp open<span class="p">|</span>filtered dhcpc
137/udp open<span class="p">|</span>filtered netbios-ns
138/udp open<span class="p">|</span>filtered netbios-dgm
5353/udp open<span class="p">|</span>filtered zeroconf
MAC Address: 1C:69:A5:D0:10:CD <span class="o">(</span>Unknown<span class="o">)</span>

Nmap <span class="k">done</span>: <span class="m">1</span> IP address <span class="o">(</span><span class="m">1</span> host up<span class="o">)</span> scanned in 143.65 seconds
</pre></div>
<p class="post-meta">Posted by
<a href="http://atodorov.org/author/alexander-todorov.html">Alexander Todorov</a>
on Wed 17 July 2013
</p>
<p>There are <a href="http://atodorov.org/blog/2013/07/17/exploring-blackberry-10-nmap/#disqus_thread">comments</a>.</p> </div>

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