sudo ./xsetup

If libncurses.so.5 is missing:

sudo apt-get install libncurses5

Run ISE:

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

ISE license manager is not able to detect the NIC when it is named by the BIOS, which is done by default in newer Ubuntu version. It is necessary to detect it for generation of the license file.

Edit the Grub configuration file

sudo vi /etc/default/grub

Change Parameter:

GRUB_CMDLINE_LINUX=""

to

GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"

Apply change to grub.

sudo grub-mkconfig -o /boot/grub/grub.cfg

Reboot.