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