more specific grep

diff --git a/input/howto/new-machine.creole b/input/howto/new-machine.creole
index 86bced4..9685e5b 100644 (file)
--- a/input/howto/new-machine.creole
+++ b/input/howto/new-machine.creole
@@ -28,7 +28,7 @@ Note: this is partially obsolete now that we have [[puppet|howto/puppet-setup]].
 
 * unless we want to keep it:
 {{{
-    dpkg -l postfix | grep '^ii' && (dpkg --purge postfix && rm /etc/aliases)
+    dpkg -l postfix | grep '^ii  postfix' && (dpkg --purge postfix && rm /etc/aliases)
 }}}
 
 * setup [[puppet|howto/puppet-setup]]