diff --git a/docs/1_setup.md b/docs/1_setup.md
index 5a2956f..cedc5f8 100644
--- a/docs/1_setup.md
+++ b/docs/1_setup.md
@@ -59,12 +59,10 @@ Execute the following instructions within the ARMHF guest system:
   echo 1 | sudo tee /proc/sys/kernel/randomize_va_spac
   ```
 - Chroot into the root filesystem:
-  ```
-  sudo mount -t proc /proc/ $ROOTFS/proc/
-  sudo mount -t sysfs /sys/ $ROOTFS/sys/
-  sudo mount -o bind /dev/ $ROOTFS/dev/
-  sudo chroot $ROOTFS/ /bin/sh
-  export SHELL=/bin/sh
+  ```shell
+  # Mount proc, sys and dev (use flag -u to unmount)
+  ./mount.sh
+  sudo chroot $ROOTFS /usr/bin/env -i SHELL="/bin/ash" PS1="(r6700v3) # " /bin/ash
   ```
 
 ----------------------------------------------------------------------------------------------------
diff --git a/mount.sh b/mount.sh
new file mode 100755
index 0000000..4dea7f3
--- /dev/null
+++ b/mount.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# Parse command line arguments
+unmount=false
+while [[ "$#" -gt 0 ]]; do
+    case $1 in
+        -u) unmount=true;
+    esac
+    shift
+done
+
+# (Un-) mounting
+if [ "$unmount" = true ]; then
+    sudo umount --recursive $ROOTFS/proc/
+    sudo umount --recursive $ROOTFS/sys/
+    sudo umount --recursive $ROOTFS/dev/
+else
+    sudo mount -t proc /proc/ $ROOTFS/proc/
+    sudo mount -t sysfs /sys/ $ROOTFS/sys/
+    sudo mount -o bind /dev/ $ROOTFS/dev/
+fi
\ No newline at end of file