diff --git a/IT/sudo unable to resolve host after hostname change.md b/IT/sudo unable to resolve host after hostname change.md
index 95badfd..01baa44 100644
--- a/IT/sudo unable to resolve host after hostname change.md	
+++ b/IT/sudo unable to resolve host after hostname change.md	
@@ -1 +1,5 @@
-Edit `/etc/hosts` to include a line under the `localhost` one with 
\ No newline at end of file
+Edit `/etc/hosts` to include a line under the `localhost` one with a loopback IP and the new hostname, eg
+```
+127.0.0.1     localhost
+127.0.0.1     newhostname
+```
\ No newline at end of file