juan@debian:~$ su
Password:
debian:/home/juan# apt-cache showpkg linux-headers
Package: linux-headers
Versions:

Reverse Depends:
Dependencies:
Provides:
Reverse Provides:
linux-headers-2.6.17-2-xen-k7 2.6.17-9
linux-headers-2.6.17-2-xen-686 2.6.17-9
linux-headers-2.6.17-2-xen 2.6.17-9
linux-headers-2.6.17-2-vserver-k7 2.6.17-9
linux-headers-2.6.17-2-vserver-686 2.6.17-9
linux-headers-2.6.17-2-vserver 2.6.17-9
linux-headers-2.6.17-2-k7 2.6.17-9
linux-headers-2.6.17-2-686-bigmem 2.6.17-9
linux-headers-2.6.17-2-686 2.6.17-9
linux-headers-2.6.17-2-486 2.6.17-9
linux-headers-2.6.17-2 2.6.17-9
linux-headers-2.6-xen-k7 2.6.17+2
linux-headers-2.6-xen-686 2.6.17+2
linux-headers-2.6-vserver-k7 2.6.17+2
linux-headers-2.6-vserver-686 2.6.17+2
linux-headers-2.6-k7 2.6.17+2
linux-headers-2.6-686-bigmem 2.6.17+2
linux-headers-2.6-686 2.6.17+2
linux-headers-2.6-486 2.6.17+2
debian:/home/juan#