diff --git a/lessons/02-crafting-containers-by-hand/D-cgroups.md b/lessons/02-crafting-containers-by-hand/D-cgroups.md
index 0f7be62..f25c6ee 100644
--- a/lessons/02-crafting-containers-by-hand/D-cgroups.md
+++ b/lessons/02-crafting-containers-by-hand/D-cgroups.md
@@ -60,7 +60,7 @@ echo <PID> > /sys/fs/cgroup/sandbox/cgroup.procs
 cat /sys/fs/cgroup/sandbox/cgroup.procs
 
 # should see the process no longer in the root cgroup - processes belong to exactly 1 cgroup
-cat /sys/fs/cgroup/cgroup.proc
+cat /sys/fs/cgroup/cgroup.procs
 ```
 
 We now have moved our unshared bash process into a cgroup. We haven't placed any limits on it yet but it's there, ready to be managed. We have a minor problem at the moment though that we need to solve.