diff --git a/cluster/apt.apply.update.sh b/cluster/apt.apply.update.sh
index f115d88..49f93bf 100755
--- a/cluster/apt.apply.update.sh
+++ b/cluster/apt.apply.update.sh
@@ -76,7 +76,7 @@ is_sge_host() {                                                 # {{{
 SGE seems present on this host."
 
 		### And verify if the host is fully configured as a submit host
-		if qconf -ss | grep --word-regexp --quiet $(hostname -f); then
+		if qconf -ss 2>/dev/null | grep --word-regexp --quiet $(hostname -f); then
 			debug_message "is_sge_host − \
 The host seems configured as a SGE submit host."
 			return_is_sge_host="0"
diff --git a/cluster/apt.check.update.sh b/cluster/apt.check.update.sh
index f85f934..5ecb5fb 100755
--- a/cluster/apt.check.update.sh
+++ b/cluster/apt.check.update.sh
@@ -99,7 +99,7 @@ is_sge_host() {                                                 # {{{
 SGE seems present on this host."
 
 		### And verify if the host is fully configured as a submit host
-		if qconf -ss | grep --word-regexp --quiet $(hostname -f); then
+		if qconf -ss 2>/dev/null | grep --word-regexp --quiet $(hostname -f); then
 			debug_message "is_sge_host − \
 The host seems configured as a SGE submit host."
 			return_is_sge_host="0"
diff --git a/cluster/maco.apply.update.sh b/cluster/maco.apply.update.sh
index 66c9530..a98c150 100755
--- a/cluster/maco.apply.update.sh
+++ b/cluster/maco.apply.update.sh
@@ -81,7 +81,7 @@ is_sge_host() {                                                 # {{{
 SGE seems present on this host."
 
 		### And verify if the host is fully configured as a submit host
-		if qconf -ss | grep --word-regexp --quiet $(hostname -f); then
+		if qconf -ss 2>/dev/null | grep --word-regexp --quiet $(hostname -f); then
 			debug_message "is_sge_host − \
 The host seems configured as a SGE submit host."
 			return_is_sge_host="0"
diff --git a/cluster/sge.enable.host.queue.sh b/cluster/sge.enable.host.queue.sh
index 21434f6..ecffbce 100755
--- a/cluster/sge.enable.host.queue.sh
+++ b/cluster/sge.enable.host.queue.sh
@@ -179,7 +179,7 @@ is_sge_host() {                                                 # {{{
 SGE seems present on this host."
 
 		### And verify if the host is fully configured as a submit host
-		if qconf -ss | grep --word-regexp --quiet $(hostname -f); then
+		if qconf -ss 2>/dev/null | grep --word-regexp --quiet $(hostname -f); then
 			debug_message "is_sge_host − \
 The host seems configured as a SGE submit host."
 			return_is_sge_host="0"