UNIX Local machine MAC address

$ ifconfig

look for the entry for HWaddr,
6 groups of 2 hex characters

ubuntu teamviewer black screen after unlock

In case after an unlock, the screen keeps dimming to black ...

Radical solution: System settings, Display, screensaver, disable sreensaver.

"May work" solution:

simply go to System settings, Display, screensaver, click anywhere in the application and exit. This will somehow update the config files and prevent further blinking during this session.

also, try to change the connection settings on the "controlling" machine:
tick "enable black screen if partner input is deactivated"

LaTeX Labels for figures

When a label is declared within a float environment, the \ref{...} will return the respective fig/table number, but it must occur after the caption. When declared outside, it will give the section number. To be completely safe, the label for any picture or table can go within the \caption{} command, as in

\caption{Close-up of a gull\label{fig:gull}} 

Source: http://en.wikibooks.org/wiki/LaTeX/Labels_and_Cross-referencing 

update Adobe Flash Player in Kubuntu

You should just install the latest version from the Ubuntu repositories. It is a lot easier and normally they keep this one up-to-date with new Linux Flash releases.
To install it run the command

sudo apt-get install flashplugin-installer

Src: http://askubuntu.com/questions/463295/how-to-update-adobe-flash-player-in-kubuntu-latest-update

Firefox Register protocol

Firefox 3.5 and above

(Works without installed Gnome libraries)

• Type about:config into the Location Bar (address bar) and press Enter.
• Right-click -> New -> Boolean -> Name: network.protocol-handler.expose.foo -> Value -> false (Replace foo with the protocol you're specifying)
• Next time you click a link of protocol-type foo you will be asked which application to open it with. 

 http://kb.mozillazine.org/Register_protocol#Firefox_3.5_and_above

matlab fix bad ticks, fix plot print preview,

%%% nice tick format %%%%%%%%%%%%%%%%%%
% Query xTick numerical values.
yTick = get(gca,'yTick');
% Create strings out of yTick numerical values with a prescribed precision.
% The format string '%a.bf' means to present the values within a field that
% is wide enough to fit 'a' digits with 'b' digits after the decimal point
% in the format of a 'f'loating point number.
yTickLabel = arrayfun( @(y) sprintf('%1.3f',y), yTick, 'uniformoutput', false);
% Use xTickLabel on the plot.
set(gca, 'yTickLabel', yTickLabel);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
src: http://www.mathworks.com/matlabcentral/answers/103188-how-do-i-format-tick-labels

To prevent Matlab from messing it once again at the print level:

latex invisible section

Something like this:

\newcommand\invisiblesection[1]{%
  \refstepcounter{section}%
  \addcontentsline{toc}{section}{\protect\numberline{\thesection}#1}%
  \sectionmark{#1}}
...

\invisiblesection{Blah}

http://tex.stackexchange.com/questions/68272/make-section-headings-invisible