To install xserver-xorg-core just follow these instructions.
/kali/kali/main///install/index.html Xorg X server - core server systems, which is derived from the XFree86 4.x series of X servers. Kali Linux 2017.1 x11 2:1.19.3-1
sudo apt-get install xserver-xorg-core
Which will install xserver-xorg-core and any other packages on which it depends.
|Maintainer||Debian X Strike Force |
|Description||Xorg X server - core server systems, which is derived from the XFree86 4.x series of X servers.|