Update debian.md

Signed-off-by: Arthit Suriyawongkul <[email protected]>

Author: bact

content/crosswalk/debian.md

@@ -2,9 +2,8 @@
 title: "Crosswalk for Debian packages"
 image: "/img/debian.png"
 date: "2017-06-01"
-
 ---
 
-The [Debian package system](https://www.debian.org/doc/manuals/debian-reference/ch02.en.html#_archive_meta_data) defines archive metadata that is used by the popular `apt` package management system on Debian and Ubuntu Linux distributions.  
+The [Debian package system](https://www.debian.org/doc/manuals/debian-reference/ch02.en.html#_archive_meta_data) defines archive metadata that is used by the popular [`apt`](https://wiki.debian.org/Apt) package management system on Debian and Ubuntu Linux distributions.
 
 {{< crosswalk name="Debian Package" >}}