Step by step guide to install Xilinx 14.7 on Debian GNU/Linux Wheezy

Installation performed on Debian wheezy

Download Xilinx_ISE_DS_Lin_14.7_1015_1.tar from Xilinx website.
Perform the following steps.

tar -xf Xilinx_ISE_DS_Lin_14.7_1015_1.tar 
cd Xilinx_ISE_DS_Lin_14.7_1015_1/
sudo ./xsetup

The installation is very easy, install everything under /opt.
To set the enviroment variables let's edit the ~/.bashrc and add the following at the end.

##Definições Xilinx
export LM_LICENSE_FILE="PORT@IP"

In this case i set the LM_LICENSE_FILE on the .bashrc because i am using a floating license, and in linux i can't use the xilinx license manager(xlcm) to set this variable(you can in windows). If you use a license file you can still use the xilinx license configuration manager.

when you want to run xps, ise or chipscope , or others, before run (Sh,Bash, ksh):

source /opt/Xilinx/14.7/ISE_DS/settings64.sh

There is a alternate version of script for c-shell in the same folder.
I am using settings64.sh since i am using a 64 bit OS, case you are using a 32 bit OS, use settings32.sh