Move pages back into a "pages" folder

pages/common/rename.md

@@ -0,0 +1,15 @@
+# rename
+
+> renames multiple files
+
+- Change foo to bar in matching files
+
+`rename {{'s/foo/bar/'}} {{*.txt}}`
+
+- Convert to lower case
+
+`rename -c {{*.txt}}`
+
+- Replace whitespace with underscores
+
+`rename --nows {{*.txt}}`