cryfs: add page (#3295)

pages/common/cryfs.md

@@ -0,0 +1,20 @@
+# cryfs
+
+> A cryptographic filesystem for the cloud.
+> More information: <https://www.cryfs.org/>.
+
+- Mount an encrypted file system. The initialization wizard will be started on the first execution:
+
+`cryfs {{path/to/cipher_dir}} {{path/to/mount_point}}`
+
+- Unmount an encrypted file system:
+
+`cryfs-unmount {{path/to/mount_point}}`
+
+- Automatically unmount after ten minutes of inactivity:
+
+`cryfs --unmount-idle {{10}} {{path/to/cipher_dir}} {{path/to/mount_point}}`
+
+- Show a list of supported ciphers:
+
+`cryfs --show-ciphers`