Add lsof to the user image

yuvipanda · yuvipanda · commit 19e8133fac75 · 2021-05-31T00:45:10.000+05:30
lsof is helpful in figuring out ports in use, which will become perhaps increasingly useful thanks to usage of https://github.com/jupyterhub/jupyter-server-proxy/. There isn't any extra security exposure here. Fixes https://phabricator.wikimedia.org/T283984
diff --git a/images/singleuser/Dockerfile b/images/singleuser/Dockerfile
@@ -70,6 +70,7 @@ RUN apt-get install --yes \
         links \
         nano \
         vim \
+        lsof \
         mariadb-client > /dev/null
 
 

-Original file line number
+Diff line change
         links \
         nano \
         vim \
 +        lsof \
         mariadb-client > /dev/null