diff --git a/jenkins-build b/jenkins-build
index 6ddc3edc..ec33ef99 100755
--- a/jenkins-build
+++ b/jenkins-build
@@ -32,6 +32,7 @@ else
         echo "No virtualization is used."
 fi
 sudo /bin/chmod -R a+rX /var/lib/libvirt/images
+echo 'maximum allowed number of open file descriptors: ' `ulimit -n`
 ls -ld /var/lib/libvirt/images
 ls -l /var/lib/libvirt/images || echo no access
 ls -lR ~/.vagrant.d/ || echo no access