Verifique a versão do Ubuntu
cat /etc/os-release
TheDutchScorpion
cat /etc/os-release
cat /etc/os-release
OR
lsb_release -a
# How to check your ubuntu version
# paste this on terminal:
lsb_release -a
lsb_release -a
cat /etc/os-release
lsb_release -a