Update README.md
diff --git a/xos/configurations/cord/README.md b/xos/configurations/cord/README.md
index 570e1de..2a37e34 100644
--- a/xos/configurations/cord/README.md
+++ b/xos/configurations/cord/README.md
@@ -49,6 +49,10 @@
```
ctl:~$ git clone https://github.com/open-cloud/xos.git
ctl:~$ cd xos/xos/configurations/cord/
+```
+Edit `cord.yaml` in this directory. Change the hostnames `cp-1.devel.xos-pg0.clemson.cloudlab.us` and
+`cp-2.devel.xos-pg0.clemson.cloudlab.us` to the names of the compute nodes in your experiment. Now run:
+```
ctl:~/xos/xos/configurations/cord$ make
```