Monday, June 21, 2010

"Remote desktop session has ended" error when connecting to a guest on VirtualBox

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I had a problem connecting from Windows using build-in Remote Desktop Connection program to a a guest on a headless VirtualBox server. I fou...
Saturday, May 29, 2010

Example of SSH tunneling

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Example: ssh -N -L 5904:127.0.0.1:5901 username@remoteserver The above command forwards everything on localhost port 5904 to the port 590...
Friday, May 14, 2010

VirtualBox: start and stop a guest in a headless mode

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Lets assume that we have a guest VirtualBox machine called "xp". To start it in a headless mode we can use VBoxHeadless --startvm ...
Sunday, April 25, 2010

bash: send a command to a screen session

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" Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells....
Saturday, April 24, 2010

Ubuntu 10.04: How to remove chat and mail icons (indicators) from system tray

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The 10.04 LTS release of Ubuntu seems to be very, very good. However, for some strange reason, creators of this release made some strange de...
Monday, March 08, 2010

Matlab: Convert numerical array to cell with string representation of numbers

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Short Matlab script that takes an array (i.e. vector) of numbers and returns cell with fileds that are string representation of the numbers ...
Wednesday, March 03, 2010

imagemagick: crop all images

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Example: convert rose: -crop 40x30+10+10 +repage repage.gif
Friday, February 26, 2010

Change font and font size in Fluxbox

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In Fluxbox 1.1 a font and a font size can be changed by editing a overlay file, usually located in ~/.fluxbox/. So just add the following l...
Thursday, February 25, 2010

bash: split string to array

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There are few possible ways of splitting a string with delimiter-separated values to an array in Bash. Here I present five of them. 1. Usi...
Wednesday, February 24, 2010

bash: read a specific line or/and a column from a file

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If we have column-row wise txt files, we can use awk and sed programs to read the rows and columns of such files. Read specific line To r...