kali

apt-get install linux-headers-$(uname -r) -y
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linux-headers-4.3.0-kali1-686-pae
E: Couldn't find any package by glob 'linux-headers-4.3.0-kali1-686-pae'
E: Couldn't find any package by regex 'linux-headers-4.3.0-kali1-686-pae'

Err http://http.kali.org kali-rolling InRelease

Err http://http.kali.org kali-rolling Release.gpg
  Could not resolve 'http.kali.org'

W: Failed to fetch http://http.kali.org/kali/dists/kali-rolling/InRelease

W: Failed to fetch http://http.kali.org/kali/dists/kali-rolling/Release.gpg  Could not resolve 'http.kali.org'

W: Some index files failed to download. They have been ignored, or old ones used instead.