--- /etc/shells	2016-02-15 06:27:32.000000000 +0100
+++ debian/shells	2016-06-18 12:05:40.000000000 +0200
@@ -1,11 +1,5 @@
 # /etc/shells: valid login shells
-/bin/bash
-/bin/csh
-/bin/dash
-/bin/esh
-/bin/fish
-/bin/ksh
-/bin/sash
 /bin/sh
-/bin/tcsh
-/bin/zsh
+/bin/dash
+/bin/bash
+/bin/rbash