debianpkg: update doc for Ubuntu 18.04

Signed-off-by: Martin Winter <mwinter@opensourcerouting.org>

diff --git a/debianpkg/README.deb_build.md b/debianpkg/README.deb_build.md
index 1536698bad7ea97ac2084a6d143d92913be2c906..c90ca13394ee8dfb6239620f17c962762b7c2398 100644 (file)
--- a/debianpkg/README.deb_build.md
+++ b/debianpkg/README.deb_build.md
@@ -11,8 +11,14 @@ adding a new backport.
 
 2. Install the following additional packages:
 
+   on Ubuntu 12.04, 14.04, 16.04, 17.10, Debian 8 and 9:
+
         apt-get install realpath equivs groff fakeroot debhelper devscripts
 
+   on Ubuntu 18.04: (realpath is now part of preinstalled by coreutils)
+
+        apt-get install equivs groff fakeroot debhelper devscripts
+
 3. Checkout FRR under a **unpriviledged** user account
 
         git clone https://github.com/frrouting/frr.git frr