Update Data/Guidelines.md

Data/Guidelines.md

-Shared Data Guideline
-@author: mblaschek
-@email: michael.blaschek@univie.ac.at
-@phone: 53715
-@date: Fri Sep 25 09:15:10 CEST 2020
+# Shared Data Guideline
 
-PATH /jetfs/shared-data
+    @author: mblaschek
+    @email: michael.blaschek@univie.ac.at
+    @phone: 53715
+    @date: Fri Sep 25 09:15:10 CEST 2020
 
-1. Be careful. Do not remove data, unless you are really certain, that this is ok for everyone.
-2. Create directories with clear names. Add permission for others
+Data currently shared on the jet cluster:
+`PATH /jetfs/shared-data`
+
+Steps:
+1. **Be careful.** Do not remove data, unless you are really certain, that this is ok for everyone.
+2. Create directories with clear names. **Add permission for others**
 3. Ask for help if needed.
 4. Add information on your data in the README.md
 
 Here data can be share with other users. 
 If you need to modify these data, copy them to scratch and remove later, in order to save storage and duplicates.
 
+## Notice Permission
+
+Typical Permissions are:
+
+    folders: 755   rwxr-xr-x  allows all users to read
+    files:   644   rw-r--r--  allows all users to read
+
+
+Change permission for all directories under that DIR:
+
+`find [DIR] -type d -exec chmod 755 {} \;`
+
+Change permission for all files:
+
+`find [DIR] -type f -exec chmod 644 {} \;`