Update repositories before upgrading packages

cluster/apt.apply.update.sh

@@ -276,6 +276,10 @@ upgrade_system() {                                              # {{{
 	debug_message "upgrade_system − \
 Try to apply APT upgrades".
 
+	## First update repositories to get all available upgrades
+	aptitude update >> "${APT_TMP_FILE}" 2>&1
+
+	## And apply full-upgrade
 	DEBIAN_FRONTEND=noninteractive aptitude -y -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold full-upgrade >> "${APT_TMP_FILE}" 2>&1
 
 }