The squiggly line is called a 'tilde', in case that helps. It's on your keyboard with the #, but as a dash, ~, not over the 'n'.
i want to write hindi wall post in facebook
You can write to him on his Facebook page.
On his facebook.
There are number of tools you can use to write on facebook. For example Quillpad, Lipikaar, Webdunia etc.
facebook notes is notes to write something about yourself .... your friends ... and your quotes .... it has large space to write as many as you like.
to write on someones facebook wall using your mobile you would do it like you would if you were on the computer/laptop
Yes, there are jobs available on Facebook. Write Facebook career on Google, there you will find the link of Facebook career portal.
ℒℴνℯ
Senorita
I love you
SHAZAR
Anything you fancy.