Bluetooth icon missing in Ubuntu

Sometimes you see, that, your Bluetooth icon, which is supposed to be at the panel is not there OR sometimes you unintentionally remove it.
And when you right click on panel you see no options to get it back.

Steps to get back your bluetooth applet icon on your panel:

1. Right click on the top panel and scroll down until you find Notification area and Indication Applet and add it to the panel. after that
2. Open terminal: bluetooth-applet then ENTER
   
   
   
   
3. Now the blooth applet icon will start showing on your panel until you close the terminal.
4. Before closing the terminal window, Right click on the bluetooth applet icon on the panel and Lock to panel.
5. After that, exit the terminal window.

You will get your bluetooth applet icon.

FIND Command in Linux Ubuntu

It has been occurred many times that we want to search some document or movie which we know is somewhere available on the hard disk but don't know the exact location.

In Linux, it won't be a much of a headache.
Find is one powerful command that will help you to search anything on your computer.

In terminal: find [directory where you want to search] -iname *[name or part of the file]*

Example: $find /home/ubuntu/Desktop -iname *programming*.doc

Here I want to search a document on Desktop and all the directories on it and it will show the documents which contain programming word in it.

It is a simple example of a Find command.

If you want to learn more about it

In Terminal: $man find

Wireless connection in Ubuntu

For this you need to click on Network-manager applet and see if you can see you
wireless there. If not, enable wireless driver from System > Administration > Hardware drivers.
Now coming to your modem settings, best solution is to configure it for "pppoe" mode.
( You can do it through Windows too, if you wish to )
1. Connect the modem with your computer with the LAN cable and turn it on.
2. Open your Browser ( Firefox ) and type 192.168.1.1 in the address bar. Type the username and password as “admin”.
3. After logging in, click Advance Setup on L.H.S. menu.
4. A table appears, check the checkbox in the first row showing "pvc 0" under the head remove, then click Remove button at the bottom.
5. Click Add, ensure the "vci" value as 35 , click Next.
6. Select the connection type as "PPPOE" , click Next.
7. Type your broadband username, password provided by your ISP and service name as multiplay, click Next.
8. Click next to reach the last page, click Apply/Save. 
9. Save and Reboot at the bottom of the table, wait for approx. 3 min. to automatically reboot the modem. After the modem reboots, confirm the stability of DSL light, after it becomes stable, you can start using your internet connection.

sudo gedit /etc/NetworkManager/nm-system-settings.conf
nm-system-settings.conf tab will open:
[main]
plugins=ifupdown,keyfile
no-auto-default=00:13:a9:61:9d:9d,
[ifupdown]
managed=false
Change this "false" to true.
Save, exit.
Then restart Networking.
sudo /etc/init.d/networking restart