How to remove libreoffice configuration/settings in debian based linux to fix the settings change problems?

Some times we do accidentally change the some settings of the libreoffice and endup with
1. weird/awakward views of our documents
2. problems in exporting our documents from one format to another say .odt to .doc
3. Alignment issues etc.,

So, If you don't know how to revert the settings/configuration you changed, or forget what changes you made.. there is one simple way to revert to the default settings.  i.e removing the configuration data of that particular user to libreoffice.

One can find this libreoffice configuration/settings file at the following path in debian based linux like ubuntu, BOSS GNU/Linux etc.
/home//.config/libreoffice/  <-- b="">Inside this you have directory named user.  Just remove(or cut & paste to some other place) this directory and launch the Libreoffice application again.  

Note:
.config is hidden file so you first enable your file browser to see the hidden files by the short cut CTRL+h. 

How to type copyright symbol, trademark symbol etc in linux?

 As our qwerty keyboard can't accommodate all the available characters, symbols we end up with the keyboard(layout) that have the main and most widely used symbols, characters(with shift, alt key combinations).  But, in my opinion our keyboard should at least add symbols like Copyright  ©, Registered  ®, Trademark symbol ™.

Usually we do get/input these symbols from:

1. From a text editor program or from office suite(from insert symbols) like libreoffice, MS office etc.

2. From internet web pages by searching terms like "copyright symbol", "Trade mark symbol"

But, it is not possible to go every time into those application or to search with google to get/input these symbols.  So, Here is a easy way to input these symbols with your standard English keyboard layout (qwerty layout).  You have to enable some already available keyboard settings(Compose key) but not enabled by default .

So, with the help of compose key we can achieve this in our standard key board itself.

Compose key: A excerpt from wikipedia
"A compose key, available on some computer keyboards, is a special kind of modifier key designated to signal the software to interpret the following (usually two) keystrokes as a combination in order to produce a character not found directly on the keyboard. For example, striking Compose followed by ~ and then n can produce character ñ, whereas striking Compose followed by O and then C can produce the symbol ©, the copyright symbol). "

How to enable
1. In  BOSS linux(or any linux which have menu like Applications, System)
System -> preferences -> keyboard settings -> Layout settings -> options -> Compose key positions
In Ubuntu
Settings -> Keyboard -> Layout settings -> Options -> Compose key positions

2. Select your desired compose key.
   You can select any listed key(ctrl, win, capslock etc) as your compose key.  But, as we are using Linux, It is recommended to use the win(dows) key as compose key.

3.  Save the settings thats all you are done.

There are many symbols and the key combinations to produce it.  I here list few most often used symbols and its compose key combinations.  I assume win(dows) key  as the compose key.

Symbol Name	Symbol	composekey combination
Copyright	©	win+o then c
Trademark	™	win+t then m
Registered symbol	®	win+o then r
Quarter	¼	Win+1 then 4
Half	½	Win+1 then 2
3 quarters	¾	Win+3 then 4
Euro	€	win+e then =
Yen	¥	win+y then =
Pound	£	win+l then -
cent	¢	win+c then |
degree	°	win+o then o

Note:  This is for the debian based linux machines(like Ubuntu, BOSS Linux etc) which employs gnome desktop environment.  If your machine is not a debian based one or it uses other desktop environment systems(like kde, xfce etc), you have to fine where the keyboard setting is available and need to enable the settings as above.

How to add/edit email signature in gmail/yahoo?

Email signature:
As per wikipedia Email signature is,
"An e-mail signature is a block of text appended to the end of an e-mail message often containing the sender's name, address, phone number, disclaimer or other contact information."

Add/Edit Email signature with gmail:

gmail-settings

1. After log in into you gmail account click on the  gear wheel symbol(at right top) -> settings -> General tab -> signature block
2. Input your signature block text & save
3. To check click on compose -> the new message will show the signature you just gave.



Add/Edit Email Signature with yahoomail:
1. After log in into your yahoomail account click on options(at top left) -> mail options -> signature
2 & 3 are same as in gmail.

How to change the username of your twitter account..?

1. Login into your twitter account
2. goto -> settings(on top near to search, in the drop down last but first option, just before sign out) -> account(on leftside menu first option)
3. You can see your full account details like username, time zone, mailid etc.. In username textbox type your new desired username and wait for twitter's response regarding the availability of that username.  Try with some modification in the username until you get username available message.  Once you got go to the bottom of the page and save changes. 
Thats all now your username is changed to new one as you entered.


Note: 
1. Details are based on the look of twitter in desktop/laptop web browser not from mobile browser.
2. Once your username is changed you should use that new username while signin into your twitter account.

How to know your gmail friend is chatting(keyboard not video) from his android mobile or from browser?

Nowadays Smartphone user base is increased in multi-fold manner.  So while we chatting we don't know whether the person at the other end is chatting with you is using his browser and keyboard are he is chatting from his android mobile.

Picture 1. - Gmail gear

Here is the simple solution,
You just need to enable the google labs' Green Robot! 
So, how to do that
1. Login to you gmail account

2. Click on settings
    Your gmail setting is at the right top of the gmail window with the gear symbol(see picture1 gmail settings).  Click on that now you will get a drop down menu with options like settings, themes, help etc.  Select settings

3. Now gmail will load the settings page with options like General, Chat, Filters, Labs, Mail Forwarding etc(see picture 2 - gmail settings options).

Picture 2 - Gmail settings options

4.  Select labs and search for Green Robot! then enable it.  Thats all... :) !


Now in your chat window you can see a small Green/Red/Orange(according to active/idle/busy) Robot icon to some of your friends who are online but from their mobile.