Ubuntu 12.04 : Applets on the panel

This is if you are using a gnome gui for ubuntu
If panel gets screwed then -
Alt + Right-Click on the panel and delete it

Then, Alt + Right-Click on the bottom panel and say "New Panel"

On the new panel do Alt + Right-Click, and click on "Add to Panel..."
In the window and add the following applets

1. Notification Area
2. Indicator Complete
3. Menu Bar (Custom menu bar)

this should resemble the default gnome toolbar.


Peace.

Scilab : Include value of a variable in figure title

If your plot command is in a loop and you want to change the title everytime based on a changing variable then use the string command and the + operator.

For example,
In my code, the variable "init_level" was changing in each iteration and I wanted it to be in the title of the plots. So I modified the title() command for my figure in the following way.

title('5. For initial Level = '+string(init_level)+' the variation is :' ,'fontsize',3);

Note how the single quotes are used as the  string command divides the title into two parts. and the + operator joins them all together.

Here, you can also see how I was able to vary the font size of the title as well.


Source of adding variable value in title - http://www.equalis.com/forums/Posts.aspx?topic=185466



Peace.

Scilab related

When you are displaying some variable repeatedly on the screen, there is a need to press a key to continue the display of variables
else the execution halts.
To remedy this add the following command at the beginning of the code.

lines(0);



Peace.

Ubuntu time format settings from terminal

 gsettings set org.gnome.desktop.interface clock-show-seconds true

this show seconds count too

Commands to run to get most latex packages

Install texlive from synaptic package manager
sudo apt-get install texlive-latex-base

sudo apt-get install texlive-extra-utils 

sudo apt-get install texlive-latex-extra

Update manager gets stuck on a package download

If the update manager gets stuck at a package download and then you can't use "apt-get install" due to errors like dpkg locked and you try rm /var/lib/../../lock and it still does not work then do the following

check the output of this command: 
ps aux | grep http 
This will result in 2 or 3 lines with the second column of each line being the pid of the process if the process is doing its job. If the result is just 1 line, say the last phrase being grep http or something, the updates are not being downloaded/installed. Its safe to kill the update manager 
To do this: 
run: ps aux | grep update and note the pid of the update-manager being the second column after your user name in the 2/3 line list of output. Let the pid of update-manager be pid 
Kill this process by running: 
kill -9 pid 
If operation is not permitted, try with sudo, but take care that you don't kill any other process. Note the pid of update-manager carefully.

Source - http://ubuntu.aspcode.net/view/635400140124705175239668/how-to-cancel-update-manager-downloading-flashplugin-installer

Disbaling bluetooth on boot up - ubuntu 12.04

Run sudoedit /etc/rc.local and add this before line with exit 0:

rfkill block bluetooth

You should still be able to enable Bluetooth through the top bar applet.

Source