Ensure to have systemd basic packages

Such as dbus and libpam-systemd.
Also ensure to purge useless configuration files.

scripts/latecommand/post.sh

@@ -29,6 +29,9 @@ apt -y full-upgrade
 # Ensure to have some basic packages
 apt -y install aptitude tmux zsh
 
+# Ensure to have some systemd basic packages
+aptitude -y install dbus libpam-systemd
+
 # Remove NFS and rpcbind
 aptitude -y remove nfs-common rpcbind
 
@@ -70,10 +73,13 @@ aptitude -y install python-apt
 
 ### Tasksel {{{
 # If tasksel and tasksel-data are the only task* relative packages
-if [ "$(dpkg -l | grep task | wc -l)" -eq "2" ]; then
+if [ "$(dpkg -l | grep -c task)" -eq "2" ]; then
 	aptitude -y remove tasksel tasksel-data
 fi
 
+# purge configuration files
+aptitude -y purge '~c'
+
 ### }}}
 
 ## }}}