Avoid using sync inside vnfs
diff --git a/utils/ci/check_manual_usage_example.sh b/utils/ci/check_manual_usage_example.sh
index c6b7c13..2d43e36 100755
--- a/utils/ci/check_manual_usage_example.sh
+++ b/utils/ci/check_manual_usage_example.sh
@@ -75,12 +75,12 @@
Cmd 'sh sync'
Cmd 'sh echo "... starting various checks"'
sync # avoid text overlapping
-Cmd 'vnf1 ifconfig && sync && echo -e "\\n... checked vnf1"'
+Cmd 'vnf1 ifconfig && echo -e "\\n... checked vnf1"'
W "^... checked vnf1"
-Cmd 'vnf2 ifconfig && sync && echo -e "\\n... checked vnf2"'
+Cmd 'vnf2 ifconfig && echo -e "\\n... checked vnf2"'
W "^... checked vnf2"
# Try to ping vnfs
-Cmd 'vnf1 ping -c 2 vnf2 && sync && echo -e "\\n... checked ping"'
+Cmd 'vnf1 ping -c 2 vnf2 && echo -e "\\n... checked ping"'
W "^... checked ping" 20s
Cmd 'quit'
# Wait for sonemu to end