Add quota reference

Author: peroame

getting-started.md

@@ -29,7 +29,7 @@ Users can use SSH, NoMachine or a browser to log into the system. The login node
 
 - Avoid keeping many (thousands to millions) of files in a single directory if possible - file systems typically do a lot better when you use a small number of large files.
 
-- Do keep an eye on your file system (quotas) - your jobs will likely fail if it cannot write to disk due to a full quota. You can either choose a different file system to write to, or request a quota increase, or remove files you don't need anymore.
+- Do keep an eye on your file system [quotas](reference.md#storagequota) - your jobs will likely fail if it cannot write to disk due to a full quota. You can either choose a different file system to write to, or request a quota increase, or remove files you don't need anymore.
 
 - Limit I/O intensive sessions where your jobs reads or writes a lot of data, or performs intensive meta data operations such as stat'ing many files or directories and opening and closing files in quick succession.
 

reference.md

@@ -44,9 +44,13 @@ id [username]
 
 
 
-### How do I check current status of storage quotas?
+### How do I check current status of storage quotas? :id=storagequota
 
-You might want to know how much of your quota is used; reaching the limit might be the cause of error messages whose reason is not obvious. To do so, simply type `df -h ~/` in a terminal window.
+You might want to know how much of your quota is used; reaching the
+limit might be the cause of error messages whose reason is not
+obvious. To do so for your home, simply type `df -h ~/` in a terminal
+window. More in general type `df -h <folder>` to determine the quota
+for any folder.
 
 
 ### May I Contribute to the S3DF Documentation? :id=docsify