Author Archives: Ahmed Tawfik

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About Ahmed Tawfik

Cybersecurity Professional, Systems Engineer, OSS & Linux Geek

How To Decrease Resolution of Output Video File in mencoder

Posted on December 16, 2009 by Ahmed Tawfik

In a previous post, I showed how to change an .ogv file to a .avi one which is useful is you’re going to give the video to a windows user. One problem I faced is that my resolution is too … Continue reading →

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How To Find and Delete Files Not Matching MULTIPLE criteria using bash in AIX

Posted on December 14, 2009 by Ahmed Tawfik

“find . ! -name “*.bz2” ! -name “ESPRD*” | xargs rm”  The above command finds all files in the “current” directory excluding those with “*.bz2” extension and those which start with “ESPRD*” and then deletes them all.

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How to add a new data file to Oracle Tablespace using sqlplus

Posted on December 14, 2009 by Ahmed Tawfik

First login as the “oracle” user, and issue the command “sqlplus “/ as sysdba”” (I am assuming that you already have configured the  PATH environment variable correctly) and then type the following:   alter tablespace tablespace_name  add datafile ‘/oracle/data/file1.dbf’ size … Continue reading →

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Convert OGV files to AVI using mencoder

Posted on December 14, 2009 by Ahmed Tawfik

OGV is the default output for the “recordmydesktop” application in ubuntu, and I needed to convert it in order to use another software: mencoder input.ogv -ovc xvid -oac mp3lame -xvidencopts pass=1 -o output.avi

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Gwibber : Twitter & Facebook Client in Ubuntu 9.04

Posted on December 12, 2009 by Ahmed Tawfik

A very nice desktop application for feeds from twitter and facebook, don’t use the one packed with Ubuntu 9.04 and use the one from the PPA instead: To download the new version : open synaptic package manager go to Settings … Continue reading →

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