fscrypt: add page (#6694)

pages/linux/fscrypt.md

@@ -0,0 +1,20 @@
+# fscrypt
+
+> Go tool for managing Linux filesystem encryption.
+> More information: <https://github.com/google/fscrypt>.
+
+- Prepare the root filesystem for use with fscrypt:
+
+`fscrypt setup`
+
+- Enable filesystem encryption for a directory:
+
+`fscrypt encrypt {{path/to/directory}}`
+
+- Unlock an encrypted directory:
+
+`fscrypt unlock {{path/to/encrypted_directory}}`
+
+- Lock an encrypted directory:
+
+`fscrypt lock {{path/to/encrypted_directory}}`