gocryptfs: add page (#2461)

pages/common/gocryptfs.md

@@ -0,0 +1,23 @@
+# gocryptfs
+
+> Encrypted overlay filesystem written in Go.
+
+- Initialize an encrypted filesystem:
+
+`gocryptfs -init {{path/to/cipher_dir}}`
+
+- Mount an encrypted filesystem:
+
+`gocryptfs {{path/to/cipher_dir}} {{path/to/mount_point}}`
+
+- Mount with the explicit master key instead of password:
+
+`gocryptfs --masterkey {{path/to/cipher_dir}} {{path/to/mount_point}}`
+
+- Change the password:
+
+`gocryptfs --passwd {{path/to/cipher_dir}}`
+
+- Make an encrypted snapshot of a plain directory:
+
+`gocryptfs --reverse {{path/to/plain_dir}} {{path/to/cipher_dir}}`