Add ncdu

Add ncdu

content/FAQ/_index.md

@@ -22,6 +22,7 @@ weight = "95"
 - [Why I can not access files under shared Attic/Swan Globus Collection?](#why-i-can-not-access-files-under-shared-attic-swan-globus-collection)
 - [I am graduating soon, what will happen with my HCC account?](#i-am-graduating-soon-what-will-happen-with-my-hcc-account)
 - [I need more resources than I can select with Open OnDemand Apps, can I do that?](#i-need-more-resources-than-i-can-select-with-open-ondemand-apps-can-i-do-that)
+- [How can I check which directories utilize the most storage on Swan?](#how-can-i-check-which-directories-utilize-the-most-storage-on-swan)
 
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@@ -278,3 +279,9 @@ Access to HCC resources is separate from access to NU resources, so you do not l
 
 #### I need more resources than I can select with Open OnDemand Apps, can I do that?
 The Open OnDemand Apps are meant to be used for learning, development and light testing and have limited resources compared to the resources available for batch submissions. If the resources provided by OOD Apps are not enough, then they should migrate their workflow to batch script.
+
+#### How can I check which directories utilize the most storage on Swan?
+You can run `ncdu` from the Swan terminal with the file-system in question and (re)move directories and data if needed, e.g.,:
+{{< highlight batch >}}
+ncdu $HOME
+{{< /highlight >}}