General: added listing file/folder sizes

linux.md

@@ -4,10 +4,22 @@
 Create directory recursivly: `mkdir -p these/folders/doesnt/exist`    
 > -p for "parent"    
 
+<br>    
 
 List directory sorted by file-size: `ls -lhS /path`    
-> -S sorts them. -lh gives a list with "human-readable" file-sizes.
+> -S sorts them. -lh gives a list with "human-readable" file-sizes.    
 
+<br>     
+
+Find the size of each item in a folder: `du -sm *`     
+You can sort them by adding: `du -sm * | sort -nr`     
+> You can add `-h`, but it won't sort correctly     
+
+
+To find the largest 20 files in a directory:
+> `du -ah ./ | sort -rh | head -20`
+
+<br>
 
 ### Set script as startup
 If, for some reason, apache isn't startup: