Uninstalling Adobe AIR Applications on Ubuntu Lucid

Posted on August 23, 2010 by Ahmed Tawfik

Today, I installed the “adobeair” package to have the Adobe AIR runtime on my Ubuntu Lucid to be able to install Adobe Air Apps, and installed the Tweetdeck application afterwards, the problem is that I didn’t like the application as it didn’t show Arabic letters!

Accordingly, I wanted to remove it, but didn’t know how to, so I googled around and found that Adobe AIR applications are integrated in the apt applications and can be easily removed via Synaptic, apt-get, aptitude …etc, I just typed “sudo apt-get remove twe” and pressed tab and it auto-completed the name for me:

“sudo apt-get remove tweetdeckfast.fff259dc0ce2657847bbb4aff0e62062efc56543.1”

The application name is pretty weird, but it did the job exactly as I wanted it, amazing, huh?

Source: http://ubuntuforums.org/showthread.php?t=1105545

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Welcome Onboard, Sharaf

Posted on August 19, 2010 by Ahmed Tawfik

Today, I’d like to welcome our newest member; Mohamed Sharaf Eldin. He’ll be the first author on this blog to write about Management, Leadership …etc, I’m sure he’ll be a great value addition, since that as much as we need Techies, we need to know how to manage & lead them, Welcome Onboard Sharaf!

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Convert CD-quality WAV to 8bit mono WAV using ffmpeg

Posted on August 19, 2010 by Ahmed Tawfik

Today I needed to record something in a WAV file that shouldn’t exceed 100 KB, when I used the standard “Sound Recorder” in Ubuntu, it recorded using the default CD-quality recording (resulting in a 280 KB file, so I used the “ffmpeg” tool to compress it to a 8bit mono file which resulted in a 28 KB file!

Here are the steps:

  1. Install “ffmpeg”, “sudo apt-get install ffmpeg”
  2. “ffmpeg -i Ahmad_Amr.wav -ar 8000 -ac 1 -acodec pcm_u8 output.wav’

For more information about ffmpeg:

Thanks to http://superuser.com/questions/94794/convert-a-mp3-to-wav-file-with-mplayer for the quick how-to

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Techienotes e-mail is back online

Posted on August 18, 2010 by Ahmed Tawfik

Techienotes.info mail has now become online, you can e-mail us at:

aamr@techienotes.info

omagdy@techienotes.info

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How to connect to a specific SID using sqlplus under Unix

Posted on August 5, 2010 by Osama Magdy

A very easy way to connect to a specific SID (other than the default one) using sqlplus, is to make this SID “temporarily” the default SID.
Just change ORACLE_SID environment variable to the required SID name:
export ORACLE_SID=sid_name
Then connect using sqlplus to the default SID:
sqlplus / as sysdba
It may not be the ideal way, but it’s “simple and stupid” as  SoCRaT says 🙂

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