coreutils commands: move pages to common/ folder (#2442)

pages/common/du.md

@@ -0,0 +1,27 @@
+# du
+
+> Disk usage: estimate and summarize file and folder space usage.
+
+- List the sizes of a folder and any subfolders, in the given unit (B/KB/MB):
+
+`du -{{b|k|m}} {{path/to/folder}}`
+
+- List the sizes of a folder and any subfolders, in human-readable form (i.e. auto-selecting the appropriate unit for each size):
+
+`du -h {{path/to/folder}}`
+
+- Show the size of a single folder, in human readable units:
+
+`du -sh {{path/to/folder}}`
+
+- List the human-readable sizes of a folder and of all the files and folders within it:
+
+`du -ah {{path/to/folder}}`
+
+- List the human-readable sizes of a folder and any subfolders, up to N levels deep:
+
+`du -h --max-depth=N {{path/to/folder}}`
+
+- List the human-readable size of all .jpg files in subfolders of the current folder, and show a cumulative total at the end:
+
+`du -ch */*.jpg`