GraphicsMagick unrecognized virtual pixel method (Transparent)

Question

I'm using GraphicsMagick to modify the image. It is working fine on windows but when i try running it on ubuntu it gives me an error

Unrecognized virtual pixel method (transparent).

Below is the command i'm using

gm convert newImages/December31201542014pm3630/profileLarge.jpg -background transparent -rotate -2 -matte -virtual-pixel transparent -distort Perspective \"0,0 0,0   213,0 213,20   213,160 213,165   0,80 0,80 \" newImages/December31201542014pm3630/skew_profile.png

Answer 1

I got it working. I simply installed Imagemagick.