[Qa-jenkins-scm] [jenkins.debian.net] 02/02: simplify (and fix) check for incorrect mtu

Holger Levsen holger at layer-acht.org
Fri Apr 28 13:18:22 UTC 2017 

This is an automated email from the git hooks/post-receive script.

holger pushed a commit to branch master
in repository jenkins.debian.net.

commit 0018114a2da9f22cfa581961a5a3bc7043088bd6
Author: Holger Levsen <holger at layer-acht.org>
Date:   Fri Apr 28 15:18:00 2017 +0200

    simplify (and fix) check for incorrect mtu
    
    Signed-off-by: Holger Levsen <holger at layer-acht.org>
---
 hosts/bbx15-armhf-rb/etc/rc.local             | 2 +-
 hosts/bpi0-armhf-rb/etc/rc.local              | 2 +-
 hosts/cb3a-armhf-rb/etc/rc.local              | 2 +-
 hosts/cbxi4a-armhf-rb/etc/rc.local            | 2 +-
 hosts/cbxi4b-armhf-rb/etc/rc.local            | 2 +-
 hosts/cbxi4pro0-armhf-rb/etc/rc.local         | 2 +-
 hosts/codethink-sled10-arm64/etc/rc.local     | 2 +-
 hosts/codethink-sled11-arm64/etc/rc.local     | 2 +-
 hosts/codethink-sled12-arm64/etc/rc.local     | 2 +-
 hosts/codethink-sled13-arm64/etc/rc.local     | 2 +-
 hosts/codethink-sled14-arm64/etc/rc.local     | 2 +-
 hosts/codethink-sled15-arm64/etc/rc.local     | 2 +-
 hosts/codethink-sled16-arm64/etc/rc.local     | 2 +-
 hosts/codethink-sled9-arm64/etc/rc.local      | 2 +-
 hosts/ff2a-armhf-rb/etc/rc.local              | 2 +-
 hosts/ff2b-armhf-rb/etc/rc.local              | 2 +-
 hosts/ff4a-armhf-rb/etc/rc.local              | 2 +-
 hosts/hb0-armhf-rb/etc/rc.local               | 2 +-
 hosts/jenkins-test-vm/etc/rc.local            | 2 +-
 hosts/jenkins/etc/rc.local                    | 2 +-
 hosts/jtk1a-armhf-rb/etc/rc.local             | 2 +-
 hosts/odu3a-armhf-rb/etc/rc.local             | 2 +-
 hosts/odxu4-armhf-rb/etc/rc.local             | 2 +-
 hosts/odxu4b-armhf-rb/etc/rc.local            | 2 +-
 hosts/odxu4c-armhf-rb/etc/rc.local            | 2 +-
 hosts/opi2a-armhf-rb/etc/rc.local             | 2 +-
 hosts/opi2b-armhf-rb/etc/rc.local             | 2 +-
 hosts/opi2c-armhf-rb/etc/rc.local             | 2 +-
 hosts/p64b-armhf-rb.debian.net/etc/rc.local   | 2 +-
 hosts/p64c-armhf-rb.debian.net/etc/rc.local   | 2 +-
 hosts/profitbricks-build1-amd64/etc/rc.local  | 2 +-
 hosts/profitbricks-build10-amd64/etc/rc.local | 2 +-
 hosts/profitbricks-build11-amd64/etc/rc.local | 2 +-
 hosts/profitbricks-build12-i386/etc/rc.local  | 2 +-
 hosts/profitbricks-build15-amd64/etc/rc.local | 2 +-
 hosts/profitbricks-build16-i386/etc/rc.local  | 2 +-
 hosts/profitbricks-build2-i386/etc/rc.local   | 2 +-
 hosts/profitbricks-build3-amd64/etc/rc.local  | 2 +-
 hosts/profitbricks-build4-amd64/etc/rc.local  | 2 +-
 hosts/profitbricks-build5-amd64/etc/rc.local  | 2 +-
 hosts/profitbricks-build6-i386/etc/rc.local   | 2 +-
 hosts/profitbricks-build7-amd64/etc/rc.local  | 2 +-
 hosts/profitbricks-build9-amd64/etc/rc.local  | 2 +-
 hosts/rpi2b-armhf-rb/etc/rc.local             | 2 +-
 hosts/rpi2c-armhf-rb/etc/rc.local             | 2 +-
 hosts/wbd0-armhf-rb/etc/rc.local              | 2 +-
 hosts/wbq0-armhf-rb/etc/rc.local              | 2 +-
 47 files changed, 47 insertions(+), 47 deletions(-)

diff --git a/hosts/bbx15-armhf-rb/etc/rc.local b/hosts/bbx15-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/bbx15-armhf-rb/etc/rc.local
+++ b/hosts/bbx15-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/bpi0-armhf-rb/etc/rc.local b/hosts/bpi0-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/bpi0-armhf-rb/etc/rc.local
+++ b/hosts/bpi0-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/cb3a-armhf-rb/etc/rc.local b/hosts/cb3a-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/cb3a-armhf-rb/etc/rc.local
+++ b/hosts/cb3a-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/cbxi4a-armhf-rb/etc/rc.local b/hosts/cbxi4a-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/cbxi4a-armhf-rb/etc/rc.local
+++ b/hosts/cbxi4a-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/cbxi4b-armhf-rb/etc/rc.local b/hosts/cbxi4b-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/cbxi4b-armhf-rb/etc/rc.local
+++ b/hosts/cbxi4b-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/cbxi4pro0-armhf-rb/etc/rc.local b/hosts/cbxi4pro0-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/cbxi4pro0-armhf-rb/etc/rc.local
+++ b/hosts/cbxi4pro0-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/codethink-sled10-arm64/etc/rc.local b/hosts/codethink-sled10-arm64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/codethink-sled10-arm64/etc/rc.local
+++ b/hosts/codethink-sled10-arm64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/codethink-sled11-arm64/etc/rc.local b/hosts/codethink-sled11-arm64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/codethink-sled11-arm64/etc/rc.local
+++ b/hosts/codethink-sled11-arm64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/codethink-sled12-arm64/etc/rc.local b/hosts/codethink-sled12-arm64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/codethink-sled12-arm64/etc/rc.local
+++ b/hosts/codethink-sled12-arm64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/codethink-sled13-arm64/etc/rc.local b/hosts/codethink-sled13-arm64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/codethink-sled13-arm64/etc/rc.local
+++ b/hosts/codethink-sled13-arm64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/codethink-sled14-arm64/etc/rc.local b/hosts/codethink-sled14-arm64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/codethink-sled14-arm64/etc/rc.local
+++ b/hosts/codethink-sled14-arm64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/codethink-sled15-arm64/etc/rc.local b/hosts/codethink-sled15-arm64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/codethink-sled15-arm64/etc/rc.local
+++ b/hosts/codethink-sled15-arm64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/codethink-sled16-arm64/etc/rc.local b/hosts/codethink-sled16-arm64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/codethink-sled16-arm64/etc/rc.local
+++ b/hosts/codethink-sled16-arm64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/codethink-sled9-arm64/etc/rc.local b/hosts/codethink-sled9-arm64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/codethink-sled9-arm64/etc/rc.local
+++ b/hosts/codethink-sled9-arm64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/ff2a-armhf-rb/etc/rc.local b/hosts/ff2a-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/ff2a-armhf-rb/etc/rc.local
+++ b/hosts/ff2a-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/ff2b-armhf-rb/etc/rc.local b/hosts/ff2b-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/ff2b-armhf-rb/etc/rc.local
+++ b/hosts/ff2b-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/ff4a-armhf-rb/etc/rc.local b/hosts/ff4a-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/ff4a-armhf-rb/etc/rc.local
+++ b/hosts/ff4a-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/hb0-armhf-rb/etc/rc.local b/hosts/hb0-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/hb0-armhf-rb/etc/rc.local
+++ b/hosts/hb0-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/jenkins-test-vm/etc/rc.local b/hosts/jenkins-test-vm/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/jenkins-test-vm/etc/rc.local
+++ b/hosts/jenkins-test-vm/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/jenkins/etc/rc.local b/hosts/jenkins/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/jenkins/etc/rc.local
+++ b/hosts/jenkins/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/jtk1a-armhf-rb/etc/rc.local b/hosts/jtk1a-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/jtk1a-armhf-rb/etc/rc.local
+++ b/hosts/jtk1a-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/odu3a-armhf-rb/etc/rc.local b/hosts/odu3a-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/odu3a-armhf-rb/etc/rc.local
+++ b/hosts/odu3a-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/odxu4-armhf-rb/etc/rc.local b/hosts/odxu4-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/odxu4-armhf-rb/etc/rc.local
+++ b/hosts/odxu4-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/odxu4b-armhf-rb/etc/rc.local b/hosts/odxu4b-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/odxu4b-armhf-rb/etc/rc.local
+++ b/hosts/odxu4b-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/odxu4c-armhf-rb/etc/rc.local b/hosts/odxu4c-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/odxu4c-armhf-rb/etc/rc.local
+++ b/hosts/odxu4c-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/opi2a-armhf-rb/etc/rc.local b/hosts/opi2a-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/opi2a-armhf-rb/etc/rc.local
+++ b/hosts/opi2a-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/opi2b-armhf-rb/etc/rc.local b/hosts/opi2b-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/opi2b-armhf-rb/etc/rc.local
+++ b/hosts/opi2b-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/opi2c-armhf-rb/etc/rc.local b/hosts/opi2c-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/opi2c-armhf-rb/etc/rc.local
+++ b/hosts/opi2c-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/p64b-armhf-rb.debian.net/etc/rc.local b/hosts/p64b-armhf-rb.debian.net/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/p64b-armhf-rb.debian.net/etc/rc.local
+++ b/hosts/p64b-armhf-rb.debian.net/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/p64c-armhf-rb.debian.net/etc/rc.local b/hosts/p64c-armhf-rb.debian.net/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/p64c-armhf-rb.debian.net/etc/rc.local
+++ b/hosts/p64c-armhf-rb.debian.net/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build1-amd64/etc/rc.local b/hosts/profitbricks-build1-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build1-amd64/etc/rc.local
+++ b/hosts/profitbricks-build1-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build10-amd64/etc/rc.local b/hosts/profitbricks-build10-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build10-amd64/etc/rc.local
+++ b/hosts/profitbricks-build10-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build11-amd64/etc/rc.local b/hosts/profitbricks-build11-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build11-amd64/etc/rc.local
+++ b/hosts/profitbricks-build11-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build12-i386/etc/rc.local b/hosts/profitbricks-build12-i386/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build12-i386/etc/rc.local
+++ b/hosts/profitbricks-build12-i386/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build15-amd64/etc/rc.local b/hosts/profitbricks-build15-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build15-amd64/etc/rc.local
+++ b/hosts/profitbricks-build15-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build16-i386/etc/rc.local b/hosts/profitbricks-build16-i386/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build16-i386/etc/rc.local
+++ b/hosts/profitbricks-build16-i386/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build2-i386/etc/rc.local b/hosts/profitbricks-build2-i386/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build2-i386/etc/rc.local
+++ b/hosts/profitbricks-build2-i386/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build3-amd64/etc/rc.local b/hosts/profitbricks-build3-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build3-amd64/etc/rc.local
+++ b/hosts/profitbricks-build3-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build4-amd64/etc/rc.local b/hosts/profitbricks-build4-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build4-amd64/etc/rc.local
+++ b/hosts/profitbricks-build4-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build5-amd64/etc/rc.local b/hosts/profitbricks-build5-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build5-amd64/etc/rc.local
+++ b/hosts/profitbricks-build5-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build6-i386/etc/rc.local b/hosts/profitbricks-build6-i386/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build6-i386/etc/rc.local
+++ b/hosts/profitbricks-build6-i386/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build7-amd64/etc/rc.local b/hosts/profitbricks-build7-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build7-amd64/etc/rc.local
+++ b/hosts/profitbricks-build7-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/profitbricks-build9-amd64/etc/rc.local b/hosts/profitbricks-build9-amd64/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/profitbricks-build9-amd64/etc/rc.local
+++ b/hosts/profitbricks-build9-amd64/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/rpi2b-armhf-rb/etc/rc.local b/hosts/rpi2b-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/rpi2b-armhf-rb/etc/rc.local
+++ b/hosts/rpi2b-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/rpi2c-armhf-rb/etc/rc.local b/hosts/rpi2c-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/rpi2c-armhf-rb/etc/rc.local
+++ b/hosts/rpi2c-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/wbd0-armhf-rb/etc/rc.local b/hosts/wbd0-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/wbd0-armhf-rb/etc/rc.local
+++ b/hosts/wbd0-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi
diff --git a/hosts/wbq0-armhf-rb/etc/rc.local b/hosts/wbq0-armhf-rb/etc/rc.local
index 8fed77b..c5caa74 100755
--- a/hosts/wbq0-armhf-rb/etc/rc.local
+++ b/hosts/wbq0-armhf-rb/etc/rc.local
@@ -45,7 +45,7 @@ fixup_mtu() {
 	# only act on systems which have eth0
 	if ip link show eth0 >/dev/null 2>&1 ; then
 		# if MTU != 1500 set it to 1500
-		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
 			ip link set dev eth0 mtu 1500
 		fi
 	fi

-- 
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