Installing Fantastico on a Linux system is fairly easy; follow these instructions and you will have it installed in no time!
1) Login to your Linux box via SSH as root.
2) Run the following commands:
# cd /usr/local/cpanel/whostmgr/docroot/cgi
# wget -N http://files.betaservant.com/files/free/fantastico_whm_admin.tgz
# tar -xzpf fantastico_whm_admin.tgz
# rm -rf fantastico_whm_admin.tgz
3) Login to WHM and navigate to: ‘WHM’ > ‘Add-Ons’ > [...]