Posts Tagged ‘substitute’

How to check if shared library is loaded in AIX OS – Fix missing libreadline.so.7

Thursday, February 20th, 2020

Reading Time: 2minutes

ibm-aix-logo1

I've had to find out whether an externally Linux library is installed  on AIX system and whether something is not using it.
The returned errors was like so:

 

# gpg –export -a

Could not load program gpg:
Dependent module /opt/custom/lib/libreadline.a(libreadline.so.7) could not be loaded.
Member libreadline.so.7 is not found in archive


After a bit of investigation, I found that gpg was failing cause it linked to older version of libreadline.so.6, the workaround was to just substitute the newer version of libreadline.so.7 over the original installed one.

Thus I had a plan to first find out whether this libreadline.a is loaded and recognized by AIX UNIX first and second find out whether some of the running processes is not using that library.
I've come across this interesting IBM official documenation that describes pretty good insights on how to determine whether a shared library  is currently loaded on the system. which mentions the genkld command that is doing
exactly what I needed.

In short:
genkld – creates a list that is printed to the console that shows all loaded shared libraries

genkld-screenshot-aix-unix

Next I used lsof (list open files) command to check whether there is in real time opened libraries by any of the running programs on the system.

After not finding anything and was sure the library is neither loaded as a system library in AIX nor it is used by any of the currently running AIX processes, I was sure I could proceed to safely overwrite libreadline.a (libreadline.so.6) with libreadline.a with (libreadline.so.7).

The result of that is again a normally running gpg as ldd command shows the binary is again normally linked to its dependend system libraries.
 

aix#ldd /usr/bin/gpg
/usr/bin/gpg needs:
         /usr/lib/threads/libc.a(shr.o)
         /usr/lib/libpthreads.a(shr_comm.o)
         /usr/lib/libpthreads.a(shr_xpg5.o)
         /opt/freeware/lib/libintl.a(libintl.so.1)
         /opt/freeware/lib/libreadline.a(libreadline.so.7)
         /opt/freeware/lib/libiconv.a(libiconv.so.2)
         /opt/freeware/lib/libz.a(libz.so.1)
         /opt/freeware/lib/libbz2.a(libbz2.so.1)
         /unix
         /usr/lib/libcrypt.a(shr.o)
         /opt/freeware/lib/libiconv.a(shr4.o)
         /usr/lib/libcurses.a(shr42.o)

 

 

# gpg –version
gpg (GnuPG) 1.4.22
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

 

Home: ~/.gnupg
Supported algorithms:
Pubkey: RSA, RSA-E, RSA-S, ELG-E, DSA
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
        CAMELLIA128, CAMELLIA192, CAMELLIA256
Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2

 

 

Block Web server over loading Bad Crawler Bots and Search Engine Spiders with .htaccess rules

Monday, September 18th, 2017

Reading Time: 6minutes

howto-block-webserver-overloading-bad-crawler-bots-spiders-with-htaccess-modrewrite-rules-file

In last post, I've talked about the problem of Search Index Crawler Robots aggressively crawling websitesand how to stop them (the article is here) explaning how to raise delays between Bot URL requests to website and how to completely probhit some bots from crawling with robots.txt.

As explained in article the consequence of too many badly written or agressive behaviour Spider is the "server stoning" and therefore degraded Web Server performance as a cause or even a short time Denial of Service Attack, depending on how well was the initial Server Scaling done.

The bots we want to filter are not to be confused with the legitimate bots, that drives real traffic to your website, just for information

 The 10 Most Popular WebCrawlers Bots as of time of writting are:
 

1. GoogleBot (The Google Crawler bots, funnily bots become less active on Saturday and Sundays :))

2. BingBot (Bing.com Crawler bots)

3. SlurpBot (also famous as Yahoo! Slurp)

4. DuckDuckBot (The dutch search engine duckduckgo.com crawler bots)

5. Baiduspider (The Chineese most famous search engine used as a substitute of Google in China)

6. YandexBot (Russian Yandex Search engine crawler bots used in Russia as a substitute for Google )

7. Sogou Spider (leading Chineese Search Engine launched in 2004)

8. Exabot (A French Search Engine, launched in 2000, crawler for ExaLead Search Engine)

9. FaceBot (Facebook External hit, this crawler is crawling a certain webpage only once the user shares or paste link with video, music, blog whatever  in chat to another user)

10. Alexa Crawler (la_archiver is a web crawler for Amazon's Alexa Internet Rankings, Alexa is a great site to evaluate the approximate page popularity on the internet, Alexa SiteInfo page has historically been the Swift Army knife for anyone wanting to quickly evaluate a webpage approx. ranking while compared to other pages)

Above legitimate bots are known to follow most if not all of W3C – World Wide Web Consorium (W3.Org) standards and therefore, they respect the content commands for allowance or restrictions on a single site as given from robots.txt but unfortunately many of the so called Bad-Bots or Mirroring scripts that are burning your Web Server CPU and Memory mentioned in previous article are either not following /robots.txt prescriptions completely or partially.

Hence with the robots.txt unrespective bots, the case the only way to get rid of most of the webspiders that are just loading your bandwidth and server hardware is to filter / block them is by using Apache's mod_rewrite through

 

.htaccess


file

Create if not existing in the DocumentRoot of your website .htaccess file with whatever text editor, or create it your windows / mac os desktop and transfer via FTP / SecureFTP to server.

I prefer to do it directly on server with vim (text editor)

 

 

vim /var/www/sites/your-domain.com/.htaccess

 

RewriteEngine On

IndexIgnore .htaccess */.??* *~ *# */HEADER* */README* */_vti*

SetEnvIfNoCase User-Agent "^Black Hole” bad_bot
SetEnvIfNoCase User-Agent "^Titan bad_bot
SetEnvIfNoCase User-Agent "^WebStripper" bad_bot
SetEnvIfNoCase User-Agent "^NetMechanic" bad_bot
SetEnvIfNoCase User-Agent "^CherryPicker" bad_bot
SetEnvIfNoCase User-Agent "^EmailCollector" bad_bot
SetEnvIfNoCase User-Agent "^EmailSiphon" bad_bot
SetEnvIfNoCase User-Agent "^WebBandit" bad_bot
SetEnvIfNoCase User-Agent "^EmailWolf" bad_bot
SetEnvIfNoCase User-Agent "^ExtractorPro" bad_bot
SetEnvIfNoCase User-Agent "^CopyRightCheck" bad_bot
SetEnvIfNoCase User-Agent "^Crescent" bad_bot
SetEnvIfNoCase User-Agent "^Wget" bad_bot
SetEnvIfNoCase User-Agent "^SiteSnagger" bad_bot
SetEnvIfNoCase User-Agent "^ProWebWalker" bad_bot
SetEnvIfNoCase User-Agent "^CheeseBot" bad_bot
SetEnvIfNoCase User-Agent "^Teleport" bad_bot
SetEnvIfNoCase User-Agent "^TeleportPro" bad_bot
SetEnvIfNoCase User-Agent "^MIIxpc" bad_bot
SetEnvIfNoCase User-Agent "^Telesoft" bad_bot
SetEnvIfNoCase User-Agent "^Website Quester" bad_bot
SetEnvIfNoCase User-Agent "^WebZip" bad_bot
SetEnvIfNoCase User-Agent "^moget/2.1" bad_bot
SetEnvIfNoCase User-Agent "^WebZip/4.0" bad_bot
SetEnvIfNoCase User-Agent "^WebSauger" bad_bot
SetEnvIfNoCase User-Agent "^WebCopier" bad_bot
SetEnvIfNoCase User-Agent "^NetAnts" bad_bot
SetEnvIfNoCase User-Agent "^Mister PiX" bad_bot
SetEnvIfNoCase User-Agent "^WebAuto" bad_bot
SetEnvIfNoCase User-Agent "^TheNomad" bad_bot
SetEnvIfNoCase User-Agent "^WWW-Collector-E" bad_bot
SetEnvIfNoCase User-Agent "^RMA" bad_bot
SetEnvIfNoCase User-Agent "^libWeb/clsHTTP" bad_bot
SetEnvIfNoCase User-Agent "^asterias" bad_bot
SetEnvIfNoCase User-Agent "^httplib" bad_bot
SetEnvIfNoCase User-Agent "^turingos" bad_bot
SetEnvIfNoCase User-Agent "^spanner" bad_bot
SetEnvIfNoCase User-Agent "^InfoNaviRobot" bad_bot
SetEnvIfNoCase User-Agent "^Harvest/1.5" bad_bot
SetEnvIfNoCase User-Agent "Bullseye/1.0" bad_bot
SetEnvIfNoCase User-Agent "^Mozilla/4.0 (compatible; BullsEye; Windows 95)" bad_bot
SetEnvIfNoCase User-Agent "^Crescent Internet ToolPak HTTP OLE Control v.1.0" bad_bot
SetEnvIfNoCase User-Agent "^CherryPickerSE/1.0" bad_bot
SetEnvIfNoCase User-Agent "^CherryPicker /1.0" bad_bot
SetEnvIfNoCase User-Agent "^WebBandit/3.50" bad_bot
SetEnvIfNoCase User-Agent "^NICErsPRO" bad_bot
SetEnvIfNoCase User-Agent "^Microsoft URL Control – 5.01.4511" bad_bot
SetEnvIfNoCase User-Agent "^DittoSpyder" bad_bot
SetEnvIfNoCase User-Agent "^Foobot" bad_bot
SetEnvIfNoCase User-Agent "^WebmasterWorldForumBot" bad_bot
SetEnvIfNoCase User-Agent "^SpankBot" bad_bot
SetEnvIfNoCase User-Agent "^BotALot" bad_bot
SetEnvIfNoCase User-Agent "^lwp-trivial/1.34" bad_bot
SetEnvIfNoCase User-Agent "^lwp-trivial" bad_bot
SetEnvIfNoCase User-Agent "^Wget/1.6" bad_bot
SetEnvIfNoCase User-Agent "^BunnySlippers" bad_bot
SetEnvIfNoCase User-Agent "^Microsoft URL Control – 6.00.8169" bad_bot
SetEnvIfNoCase User-Agent "^URLy Warning" bad_bot
SetEnvIfNoCase User-Agent "^Wget/1.5.3" bad_bot
SetEnvIfNoCase User-Agent "^LinkWalker" bad_bot
SetEnvIfNoCase User-Agent "^cosmos" bad_bot
SetEnvIfNoCase User-Agent "^moget" bad_bot
SetEnvIfNoCase User-Agent "^hloader" bad_bot
SetEnvIfNoCase User-Agent "^humanlinks" bad_bot
SetEnvIfNoCase User-Agent "^LinkextractorPro" bad_bot
SetEnvIfNoCase User-Agent "^Offline Explorer" bad_bot
SetEnvIfNoCase User-Agent "^Mata Hari" bad_bot
SetEnvIfNoCase User-Agent "^LexiBot" bad_bot
SetEnvIfNoCase User-Agent "^Web Image Collector" bad_bot
SetEnvIfNoCase User-Agent "^The Intraformant" bad_bot
SetEnvIfNoCase User-Agent "^True_Robot/1.0" bad_bot
SetEnvIfNoCase User-Agent "^True_Robot" bad_bot
SetEnvIfNoCase User-Agent "^BlowFish/1.0" bad_bot
SetEnvIfNoCase User-Agent "^JennyBot" bad_bot
SetEnvIfNoCase User-Agent "^MIIxpc/4.2" bad_bot
SetEnvIfNoCase User-Agent "^BuiltBotTough" bad_bot
SetEnvIfNoCase User-Agent "^ProPowerBot/2.14" bad_bot
SetEnvIfNoCase User-Agent "^BackDoorBot/1.0" bad_bot
SetEnvIfNoCase User-Agent "^toCrawl/UrlDispatcher" bad_bot
SetEnvIfNoCase User-Agent "^WebEnhancer" bad_bot
SetEnvIfNoCase User-Agent "^TightTwatBot" bad_bot
SetEnvIfNoCase User-Agent "^suzuran" bad_bot
SetEnvIfNoCase User-Agent "^VCI WebViewer VCI WebViewer Win32" bad_bot
SetEnvIfNoCase User-Agent "^VCI" bad_bot
SetEnvIfNoCase User-Agent "^Szukacz/1.4" bad_bot
SetEnvIfNoCase User-Agent "^QueryN Metasearch" bad_bot
SetEnvIfNoCase User-Agent "^Openfind data gathere" bad_bot
SetEnvIfNoCase User-Agent "^Openfind" bad_bot
SetEnvIfNoCase User-Agent "^Xenu’s Link Sleuth 1.1c" bad_bot
SetEnvIfNoCase User-Agent "^Xenu’s" bad_bot
SetEnvIfNoCase User-Agent "^Zeus" bad_bot
SetEnvIfNoCase User-Agent "^RepoMonkey Bait & Tackle/v1.01" bad_bot
SetEnvIfNoCase User-Agent "^RepoMonkey" bad_bot
SetEnvIfNoCase User-Agent "^Zeus 32297 Webster Pro V2.9 Win32" bad_bot
SetEnvIfNoCase User-Agent "^Webster Pro" bad_bot
SetEnvIfNoCase User-Agent "^EroCrawler" bad_bot
SetEnvIfNoCase User-Agent "^LinkScan/8.1a Unix" bad_bot
SetEnvIfNoCase User-Agent "^Keyword Density/0.9" bad_bot
SetEnvIfNoCase User-Agent "^Kenjin Spider" bad_bot
SetEnvIfNoCase User-Agent "^Cegbfeieh" bad_bot

 

<Limit GET POST>
order allow,deny
allow from all
Deny from env=bad_bot
</Limit>

 


Above rules are Bad bots prohibition rules have RewriteEngine On directive included however for many websites this directive is enabled directly into VirtualHost section for domain/s, if that is your case you might also remove RewriteEngine on from .htaccess and still the prohibition rules of bad bots should continue to work
Above rules are also perfectly suitable wordpress based websites / blogs in case you need to filter out obstructive spiders even though the rules would work on any website domain with mod_rewrite enabled.

Once you have implemented above rules, you will not need to restart Apache, as .htaccess will be read dynamically by each client request to Webserver

2. Testing .htaccess Bad Bots Filtering Works as Expected


In order to test the new Bad Bot filtering configuration is working properly, you have a manual and more complicated way with lynx (text browser), assuming you have shell access to a Linux / BSD / *Nix computer, or you have your own *NIX server / desktop computer running
 

Here is how:
 

 

lynx -useragent="Mozilla/5.0 (compatible; MegaIndex.ru/2.0; +http://megaindex.com/crawler)" -head -dump http://www.your-website-filtering-bad-bots.com/

 

 

Note that lynx will provide a warning such as:

Warning: User-Agent string does not contain "Lynx" or "L_y_n_x"!

Just ignore it and press enter to continue.

Two other use cases with lynx, that I historically used heavily is to pretent with Lynx, you're GoogleBot in order to see how does Google actually see your website?
 

  • Pretend with Lynx You're GoogleBot

 

lynx -useragent="Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" -head -dump http://www.your-domain.com/

 

 

  • How to Pretend with Lynx Browser You are GoogleBot-Mobile

 

lynx -useragent="Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7 (compatible; Googlebot-Mobile/2.1; +http://www.google.com/bot.html)" -head -dump http://www.your-domain.com/

 


Or for the lazy ones that doesn't have Linux / *Nix at disposal you can use WannaBrowser website

Wannabrowseris a web based browser emulator which gives you the ability to change the User-Agent on each website req1uest, so just set your UserAgent to any bot browser that we just filtered for example set User-Agent to CheeseBot

The .htaccess rule earier added once detecting your browser client is coming in with the prohibit browser agent will immediately filter out and you'll be unable to access the website with a message like:
 

HTTP/1.1 403 Forbidden

 

Just as I've talked a lot about Index Bots, I think it is worthy to also mention three great websites that can give you a lot of Up to Date information on exact Spiders returned user-agent, common known Bot traits as well as a a current updated list with the Bad Bots etc.

Bot and Browser Resources information user-agents, bad-bots and odd Crawlers and Bots specifics

1. botreports.com
2. user-agents.org
3. useragentapi.com

 

An updated list with robots user-agents (crawler-user-agents) is also available in github here regularly updated by Caia Almeido

There are also a third party plugin (modules) available for Website Platforms like WordPress / Joomla / Typo3 etc.

Besides the listed on these websites as well as the known Bad and Good Bots, there are perhaps a hundred of others that might end up crawling your webdsite that might or might not need  to be filtered, therefore before proceeding with any filtering steps, it is generally a good idea to monitor your  HTTPDaccess.log / error.log, as if you happen to somehow mistakenly filter the wrong bot this might be a reason for WebsiteIndexing Problems.

Hope this article give you some valueable information. Enjoy ! 🙂

 

Drawing GANTT Charts and Project Management on Linux, (Microsoft Project substitute for Unix)

Tuesday, October 12th, 2010

Reading Time: 3minutes

I'm studying Project Management, right now. In that spirit of thoughts I and a couple of other guys are building a Project Plan.
As it Project Plan it's necessary to put a GANTT Chart in it to show visually the project timeline (the phases), the duration and the inter-relation between the different tasks which leads the project to an actual completion.

After a bit of thorough research online on available software to deal with project management and particularly, ones that are capable to build a GANTT charts on Linux / BSD.

I've come with the following list of software capable to be a substitute for the Microsoft Project software.
Redmine GANTT Chart

GANTT chart Redmine

1. Gantt Project
GANTTProject chartGANTTProject Chart

2. Gnome Planner
Planner GANTT Gnome ChartPlanner GANTT Chone Chart

3. Task Juggler Project Manager with GANTT Capability for (KDE)
Task Juggler

4. JxProject – This software is not free, though it can be considered almost free
Take a look also at:
5. Trac , though it doesn't really support GANTT charts it's a lovely software to be used for PM.
Trac Project Management

Another option you have is to try out:
6. PHProjekt

Update 20.09.2016 – PHPProject Old download link is no longer active

It is this link http://www.phprojekt.com/, but the page doesn’t seem to be active any more. I thought you might want to update.

If you are looking for an alternative please check out http://wiht.link/PHProjekt-PM, it may make a suitable replacement.

Kind Regards,
Tom Wilcox


That piece of softwre really looks promising, especially if we consider that it's web based and how much essential is today to have an anline tools for doing the ordinary desktop jobs.

You can even check an online demo of the PHPProjekt software here

If you're a type of KDE user you definitely has to try out Kplato

As I've tested the software the software is easy to be used, however it still is missing some essential parts that Microsoft Project includes so it's not 100% substitute.
Also it's not able to open Microsoft Project (MPP) files, neither able to save the charts in the .mpp format.

Moving ahead I've came across DotProjectDotProject Gantt Chart
DottProject Gantt Chart

I haven't took the time to test it myself but however, as I go through the software website the project looked quite good.
Lastly you can take a look at: 7. PStricks as a mean of project management, however I think it doesn't support GANTT chart building.
>

My struggles to find good substitute for old QWERTY Nokia 9300 Communicator and The Death of QWERTY Smart phones

Monday, January 27th, 2014

Reading Time: 5minutes

Nowadays having a a touch screen mobile phone has become like a standard. I'm not such a big fan of Touch screen technology, thus I've been fighting with the idea to own a touch screen phone for a year or so. Just till recently I happily lived with my old Nokia 9300i with a physical QWERTY keyboard for already 4 years.

Unfortunately lately while talking with my Nokia I started getting frequent voice interruptions missing words in my phone call conversations and need to ask person I'm talking to, to repeat his words / sentence in order to understand what is communicated .. I'm economic person and therefore don't like bying anything new if it is not absolutely necessary so I opened the phone and clean it hoping that this will solve the conversation issues but with no luck. With this half-usable mobile my only option left was to buy a new mobile phone.

I'm not very rigorious on what a mobile phone should be and I'm very much minimalist by heart so I was thinking of bying new cheapest available Nokia phone on the market and solve my "issue" quick and efficient,  only problem was  I'm quite used already of using my handy QWERTY phone as a note taking device thus I preferred to not buy a keypad mobile phone but get again a smartphone with physical QWERTY.

I have consulted with some friends who are more knowledgable on what's latest on mobile phone market with a question what will be a good substitute for my Nokia Communicator 9300i and heard comments like:
'IPhone is the most functional and superior in interface', while some friends and colleagues adviced me:
'Choose an Android based phone as Android is Linux based and gives more freedom to the user as well as has more free applications to install'

I appreaciated my friends help but I didn't like the idea to buy a Smartphone with a touchscreen display – virtual keyboard is not so confortable as having a physical one and besides this is a very slow interface compared to physical keys. Thus initially strongly rejected the idea of bying a phone without a physical keyboard. After some weeks of pondering and checking in the market – in 3 Major mobile operators shops in Bulgaria MTel, Globul and VIVACOM and HANDY store. I've find out currently on the market there is no good price / quality and functionality ratio (qwerty keyboard mobile) available. My options were limited to either by a Nokia Asha 210 or some variance or a Blackberry mobile.

nokia_asha_210_mobile_phone

In first glimpse I liked the Nokia ASHA 210 – QWERTY powered mobile  but after noticing the blue Facebook "F" button got quickly jolted.
The sales lady offered me a couple of other Nokias with Qwerty keyboard as well as a Blackberry 9320 Curve.

blackberry_curve_smart_mobile_phone
After a quick test of all QWERTY mobiles, found the intertface on both is so inferior to IPhone's IOS and Android based phones.
I asked my HP workmates for advice of a good QWERTY bundled mobile phone with Android and was referred to Motorolla Droid 3 – which seems to among the only options on the market for mobile Phone which have both Android Operating System and a Physical QWERTY keyboardMotorolla Droid 3 seemed to be exactly the mobile I was looking for but unfortunately it is not available in Mobile phones stores in Bulgaria and only in bulgaria is only offered for sale as a second hand and I had to buy it over the Internet (I prefer not to buy on the Internet). Even if I bought it as second hand  DROID 3's price is too high for my budget – 250 EUR!

Motorola-Droid-3-mobile-nokia-9300i-substitute

I wanted to buy economic phone and same time to have a good balance between price and phone modernity, same time don't tie myself with mobile operator yearly tax plan thus decided to pay my whole mobile price in cache (no credits, no binding 2 / 3 year conversation plans).

After evaluating the options on Market I stopped on two mobiles identical by price 150 EUR I could choose between Samsung Galaxy Trend Lite or ZTE Blade 3. The sales lady adviced me its better to get the ZTE Blade 3 than Samsung Galaxy Trend Lite (S7350) because ZTE has better Camera (5 Mpixels), a better Display and has much less hardware issues than Samsung Galaxy Lite.

Samsung-Galaxy-Trend-Lite-S7390-smart-mobile-phone

 

Finally I bought the ZTE Blade 3 and nowdays I'm trying to get used to it and to be honest even with a week passed I still can't get used to the Virtual Keyboard

Android interface is quite shiny but a little bit chaotic if compared to design use interface I've tested on IPhones. Android OS seems to behave very weird at times but in general is quite easy to use. Managing / installing / Removing applications from Google AppStore is done by only 2 clicks. My major concern on Android is its highly addictive. I've catch myself, since last week I spend much more time using my mobile than before with my Nokia Communicator …
ZTE-Blade-III-Black-smart-phone

To conclude it I would say living with a smartphone has its advantagous (you can easily check weather prognosis / news) and do a number of things with it, but it is addictive .. obviously its easy to  become an Android addict and spend your free time on useless stuff like installing / testing new apps and playing with phone. Having a smartphone just like I priorly suspected is a big time eater and it seems my hypothesis  that its better to live without a smart phone is true. But who knows, perhaps its just a moment addictiveness just like with any new thing posession – time will show. In meantime I believe my ZTE Blade III – purchase was a good deal as it gives me opportunity to explore Android OS. I'll stop here with my ranting and excuse myself if the article was too boring …Please drop me a comment with mobile types and names who had QWERTY keyboard and a modern OS. Very sadly it seems the QWERTY hardware keyboard mobiles will soon be dead and gone …

Installing XMMS on Debian Squeeze from a Package / Installing XMMS on Debian – the debian way

Tuesday, July 17th, 2012

Reading Time: < 1minuteinstalling xmms on debian squeeze linux playing free software song green skin screenshot

I use Debian Linux for my desktop for quite some time; Even though there are plenty of MP3 / CD players around in Debian, I’m used to the good old XMMS, hence I often prefer to use XMMS to play my music instead of newer players like RhythmBox or audacious.
Actually audacious is not bad substitute for XMMS and is by default part of Debian but to me it seems more buggy and tends to crash during playing some music formats more than xmms ….

As most people might know, XMMS is no longer supported in almost all modern Linux distributions, so anyone using Debian, Ubuntu or other deb derivative Linux would have to normally compile it from source.
Compiling from source is time consuming and I think often it doesn’t pay back the effort. Thanksfully, though not officially supported by Debian crew XMMS still can be installed using a deb xmms prebuilt package repository kindly provided by a hacker fellow knuta.

Using the pre-build deb packages, installing xmms on new Debian installs comes to:

debian:~# echo 'deb http://www.pvv.ntnu.no/~knuta/xmms/squeeze ./' >> /etc/apt/sources.list
debian:~# echo 'deb-src http://www.pvv.ntnu.no/~knuta/xmms/squeeze ./' >> /etc/apt/sources.list
debian:~# apt-get update && apt-get -y install xmms

There are also deb xmms built for Ubuntu, so Ubuntu users could install xmms using repositories:

deb http://www.pvv.ntnu.no/~knuta/xmms/karmic ./
deb-src http://www.pvv.ntnu.no/~knuta/xmms/karmic ./
That’s all now xmms is ready to use. Enjoy 🙂

Improve default picture viewing on Slackware Linux with XFCE as Desktop environment

Saturday, March 17th, 2012

Reading Time: 2minutes

Default XFce picture viewer on Slackware Linux is GIMP (GNU Image Manipulation Program). Though GIMP is great for picture editting, it is rather strange why Patrick Volkerding compiled XFCE to use GIMP as a default picture viewer? The downsides of GIMP being default picture viewing program for Slackware's XFCE are the same like Xubuntu's XFCE risterroro, you can't switch easily pictures back and forward with some keyboard keys (left, right arrow keys, backspace or space etc.). Besides that another disadvantage of using GIMP are;
a) picture opening time in GIMP loading is significantly higher if compared to a simple picture viewer program like Gnome's default, eye of the gnomeeog.

b) GIMP is more CPU intensive and puts high load on each picture opening

A default Slackware install comes with two good picture viewing programs substitute for GIMP:
 

  • Gwenview

    Gwenview on Slackware Linux picture screenshot XFCE

  •  
  • Geeqie
  • Geeqie Slackware Linux Screenshot XFCE

    Both of the programs support picture changing, so if you open a picture you can switch to the other ones in the same directory as the first opened one.
    I personally liked more Gwenview because it has more intutive picture switching controls. With it you can switch with keyboard keys space and backspace

    To change GIMP's default PNG, JPEG opening I had with mouse right button over a pic and in properties change, Open With: program.

    XFCE4 Slackware Linux picture file properties window

    If you're curious about the picture on on all screenshots, this is Church – Saint George (situated in the city center of Dobrich, Bulgaria).
    St. Georgi / St. George Church is built in 1842 and is the oldest Orthodox Church in Dobrich.
    In the Crimean War (1853-1856) the church was burned down and was restored to its present form in 1864.

    gpicview is another cool picture viewing program, I like. Unfortunately on Slackware, there is no prebuild package and the only option is either to convert it with alien from deb package or to download source and compile as usual with ./configure && make && make install .
    Downloading and compiling from source went just fine on Slackware Linux 13.37gpicview has more modern looking interface, than gwenview and geeqie. and is great for people who want to be in pace with desktop fashion 🙂

The day, Today

Tuesday, May 20th, 2008

Reading Time: 2minutes
The day started a bit normal. I did my morning excercise, then I prayed. I spoke with Dzemil (A macedonian colleague of mine) and we set up a meeting for 12:30, I ate. I received few calls from the office with requests to do few little things. At 12:30 I met Dzemil at the College restaurant. We spend some time talking with him and another turkish colleague. Then we went to speak with Bozhidar Bozhkov about the applications for Holland, what is the procedure of transfering from the college here to Arnhem Business School etc. Laters I went home and did some work on the servers and red and did my fourth cisco test. I went to my cousin and after that went to Javor, we went out with Ina and Javor for a coffee to Kukla. Afterwards I went home and played with Dynamips. For all that wonder what the hack Dynamips is. Well Dynamics is a Cisco emulator just like VMWare is an OS emulator with the exception that Dynamics is builded to run only Cisco’s IOS. I found that nice Video tutorial Cisco Router Emulation Software Dynamips Video Tutorial, check it out here Here . Since I needed a Cisco IOS image and I’m not a Cisco customer I used torrents to download a collection of Cisco ISO’s and used one of the isos to make it work on my Windows Vista. I have problems running it because of lack of permissions, caused by the famous UAC ( User Access Control ). The solution for me was to use a privileged command prompt and start, both the Dynamips sever and my custom configured simple1.net which connected to the server and loaded the cisco image. There is also a very nice and extended tutorial on the topic of Dynamips it’s located Here . Alto today tested the previously installed Wireshark. Wireshark is a very nice substitute for iptraf for windows it has a nice and easy to use graphical interface, supports capturing and has lot of traffic analysis possibilities I strongly recommend it to anyone coming from a Linux/BSD background like me and searching for a nice Windows substitute for iptraf. Check out wireshark on the following URL . Now I’m going to change the topic and say a few words for my spiritual state. Today it was a hard day. I was tempted by the devil to think bad thoughts and did sinned for which I search forgiveness. Life it so hard I realize it more and more day by day. Very often old spirits which tormented me for a long time are trying to come back. I haven’t smoked today also and again thanks for that should fly to God who delived me from this terrible vice. As a conclusion I should say that for everything I should thanks to God and pray for him to forgive my unfaithfulness. END—–

Solving “Cannot redeclare show_subscription_checkbox() (previously declared in .. wp-content/plugins/subscribe-to-comments/subscribe-to-comments.php”

Monday, March 21st, 2011

Reading Time: < 1minute
I’m trying to install subscribe-to-comments wordpress plugin in order to make my users to easily set a tick and receive new emails if somebody replies to their comments in my blog. Pitily downloading and trying to install the subscribe-to-comments wordpress plugin was failing after it’s activation with an error message:

PHP Fatal error: Cannot redeclare show_subscription_checkbox() (previously declared in /var/www/blog/wp-content/plugins/subscribe-to-comments/subscribe-to-comments.php:12) in /var/www/blog/wp-content/plugins/subscribe-to-comments.php on line 58"

I did my best to edit the subscribe-to-comments.php to fix up the fatal error but it was no go, so after a bunch of research I’ve found out somebody created a new version of the plugin under the name subscribe-to-comments-reloaded .

I’ve proceeded and gave a try to subscribe-to-comments-reloaded as a substitute to the old broken subscribe-to-comments .

Enabling the subscribe-to-commets-reloaded worked out of the box and the plugin now works perfectly fine and even better is enabling all the functionaity of the subscribe-to-comments
Cheers 🙂