Merge pull request #763 from oxguy3/patch-3

shred: add page

pages/common/shred.md

@@ -0,0 +1,19 @@
+# shred
+
+> Overwrite files to securely delete data.
+
+- Overwrite a file:
+
+`shred {{file}}`
+
+- Overwrite a file, leaving zeroes instead of random data:
+
+`shred --zero {{file}}`
+
+- Overwrite a file 25 times:
+
+`shred -n25 {{file}}`
+
+- Overwrite a file and remove it:
+
+`shred --remove {{file}}`