diff --git a/opsschool/ubuntu.crontab b/opsschool/ubuntu.crontab
index c85bac4..b7e04d8 100644
--- a/opsschool/ubuntu.crontab
+++ b/opsschool/ubuntu.crontab
@@ -1,3 +1,3 @@
 # vim:filetype=crontab
 0 * * * * date
-* * * * * (date -u && df -h) >/var/tmp/disk_space.txt
+0-5 * * * * (date -u && df -h) >/var/tmp/disk_space.txt