Merge pull request #531 from joelhy/convmv-page

add convmv to common page

pages/common/convmv.md

@@ -0,0 +1,11 @@
+# convmv
+
+> Converts filenames (NOT file content) from one encoding to another
+
+- convert encoding, dry run (without actually changes filename)
+
+`convmv -f {{from_encoding}} -t {{to_encoding}} {{input_file}}`
+
+- convert encoding, not dry run (actually rename the file)
+
+`convmv -f {{from_encoding}} -t {{to_encoding}} --notest {{input_file}}`