Originally Posted by KlenTelaris

That because you are noob

If you are on cent os,type following: yum install ImageMagick
If you are on debian/ubuntu type following: apt-get install ImageMagick
If you are not on any of these operative systems,then check does operative system have it's own packaging system ,if it does not,then you will need to compile image magick from source code.But even that is not hard,you just need to type following commands in that case: ( after you extract archive and enter archived directory)
./configure
make
make install
And that's it.