diff --git a/dmount.sh b/dmount.sh
index 0920c7e..24e9d49 100755
--- a/dmount.sh
+++ b/dmount.sh
@@ -1,5 +1,30 @@
 #/bin/bash
 
+#def constantes.
+
+Version=1.0.0
+Usage="dmount.sh [PARAMETTER]
+
+Permit to mount an LVM on LUKS device when you have already added to /etc/fstab all volumes.
+
+PARAMETER
+    -h, --help          Print this help and exit
+    -v, --version       Print the version of this program and exit
+    "
+
+for i in $@; do
+    case "$i" in
+        "-h" | "--help")
+            echo "${Usage}"
+            exit 0
+            ;;
+        "-v" | "--version")
+            echo "dmount.sh v.${Version}"
+            exit 0
+            ;;
+    esac
+done
+
 echo "unlocking device cryptdata"
 doas rc-service dmcrypt restart
 doas vgchange -a y cryptdata
diff --git a/dumount.sh b/dumount.sh
index 048920e..c682e1f 100755
--- a/dumount.sh
+++ b/dumount.sh
@@ -1,5 +1,33 @@
 #/bin/bash
 
+
+Version=1.0.0
+Usage="dumount.sh [PARAMETTER]
+
+Umount a LVM on LUKS device. In case it was unplugged without being unmounted, use dmsetup tu force the deactivation of the lvm drive.
+
+PARAMETER
+    -h, --help          Print this help and exit
+    -v, --version       Print the version of this program and exit
+    "
+
+for i in $@; do
+    case "$i" in
+        "-h" | "--help")
+            echo "${Usage}"
+            exit 0
+            ;;
+        "-v" | "--version")
+            echo "dmount.sh v.${Version}"
+            exit 0
+            ;;
+    esac
+done
+
+
+
+
+
 MOUNTPOINT_cours=/home/primardj/cours
 MOUNTPOINT_doc=/home/primardj/Documents
 MOUNTPOINT_virt_machine=/home/primardj/virtual_machine