Adding watermark to images in Ubuntu via terminal

Heya
I thought as I am becoming more and more dependent on Ubuntu, i should find a system of adding watermarks easily.
And i found it.

Say, you have a folder full of pictures. Now all you have to do is open a terminal, browse to that folder using cd command.
now that you are in that folder, and you want to add water marks to every picture, you simply use this command in terminal

Code:

mogrify -font /home/lordamit/Downloads/SolaimanLipi_20-04-07.ttf -pointsize 22 -verbose -draw "gravity south fill white text 1,32 'lordamit@gmail.com' " *.jpg

here mogrify is a command under ImageMagick. you will need TrueType fonts to add watermark(I didn't test with any other type)
the pointsize tells the font size.
and gravity south means the text will be located at the bottom of the picture.

I guess that pretty much explains it!
Enjoy

where do you find these sort of stuffs???

well... the stuffs i find are most of the time obsolete(like some commands which are no longer used). So i have to modify them myself. And then post them here.

:p So... you can say that... I didn't find this from anywhere. but.. i found the ancestor of this thing somewhere :p