diff --git a/DEBIAN/control b/DEBIAN/control
index 4cfed60..ff4fa1e 100644
--- a/DEBIAN/control
+++ b/DEBIAN/control
@@ -1,6 +1,6 @@
 Package: multish
-Version: 0.2.1
+Version: 0.3.0
 Architecture: all
 Maintainer: Raul Tierno<adminies.castuera1@educarex.es>
-Depends: tmux,sshpass
+Depends: tmux,sshpass,nmap
 Description: multish allows you to connect and act in multiple ssh connection simultaneously
diff --git a/DEBIAN/postinst b/DEBIAN/postinst
new file mode 100755
index 0000000..69b5595
--- /dev/null
+++ b/DEBIAN/postinst
@@ -0,0 +1,24 @@
+#!/bin/bash
+# file name preinst
+
+echo "Pre Installation code here ..."
+
+
+function createFolderIfNotExists   {
+    if [ ! -d $1 ]; then
+        mkdir -p $1
+    fi
+}
+
+function checkifDirectoryIsEmpty {
+    if [ -z "$(ls -A $1)" ]; then
+        echo "The directory $1 is empty"
+        cp /usr/share/multish/files/example $1/example
+    else
+        echo "The directory $1 is not empty. No Action"
+    fi
+}
+
+FOLDER="/etc/multish/group"
+createFolderIfNotExists $FOLDER
+checkifDirectoryIsEmpty $FOLDER
\ No newline at end of file
diff --git a/README.md b/README.md
index 1dc9e66..8a27d00 100644
--- a/README.md
+++ b/README.md
@@ -22,13 +22,13 @@ al instalar tener por defecto en `/etc/multish/groups` los archivos de grupos a
 En la carpeta donde hayas descargado el archivo .deb apt/apt-get install instala el paquete y las dependencias. Poner './' para que sepa que es un archivo local y no un paquete de los repositorios
 
 ```sh
-apt install ./multish_0.2.1_all.deb
+apt install ./multish_0.3.0_all.deb
 ```
 
 Si usas dpkg debes ejecutar despues apt para instalar las dependencias y finalizar la instalación
 
 ```sh
-dpkg -i multish_X.Y.Z_all.deb
+dpkg -i multish_0.3.0_all.deb
 apt-get -f install
 ```
 
diff --git a/multish_0.2.1_all.deb b/multish_0.3.0_all.deb
similarity index 52%
rename from multish_0.2.1_all.deb
rename to multish_0.3.0_all.deb
index 5b5f9e2..2acd0fc 100644
Binary files a/multish_0.2.1_all.deb and b/multish_0.3.0_all.deb differ
diff --git a/usr/bin/multish b/usr/bin/multish
index 05a0667..7f22830 100755
--- a/usr/bin/multish
+++ b/usr/bin/multish
@@ -3,7 +3,7 @@
 #    multissh - create a tmux-cssh connection from parameter or selected option
 #
 #    Authors: Raul Tierno <raultm@gmail.com>
-#             Fernando Lorenzo
+#             Fernando Lorenzo <fernandomovil@gmail.com>
 #
 #
 
@@ -39,7 +39,7 @@ function checkargument {
 }
 
 function selectoption {
-    prompt="Select group: "
+    prompt="Select Option: "
     options=( $(find /etc/multish/group -type f -name "*" -print0 | xargs -0) )
 
     echo ""
@@ -47,13 +47,17 @@ function selectoption {
     echo "-----------------------------------------"
     PS3="$prompt "
 
-    select opt in "${options[@]}" "Copy SSH public key to group" "Quit" ; do
-        if (( REPLY == 2 + ${#options[@]} )) ; then
+    select opt in "${options[@]}" "Find hosts with port 22 open in network" "Copy SSH public key to group" "Quit" ; do
+        if (( REPLY == 3 + ${#options[@]} )) ; then
             break
-        elif (( REPLY == 1 + ${#options[@]} )); then
+        elif (( REPLY == 2 + ${#options[@]} )); then
             echo
             multish-copy-id
             exit
+        elif (( REPLY == 1 + ${#options[@]} )); then
+            echo
+            multish-discover-hosts
+            exit
         elif (( REPLY > 0 && REPLY <= ${#options[@]} )) ; then
             echo  "You picked $opt which is file $REPLY"
             cssh $opt
diff --git a/usr/bin/multish-discover-hosts b/usr/bin/multish-discover-hosts
new file mode 100755
index 0000000..2dea5d9
--- /dev/null
+++ b/usr/bin/multish-discover-hosts
@@ -0,0 +1,56 @@
+#!/bin/bash
+#
+#    multissh-discovers-hosts - search for devices with 22 open port to store and connect to them
+#
+#    Authors: Raul Tierno <raultm@gmail.com>
+#
+#
+
+function findAllHostsWithPort22OpenInNetwork {
+    sudo nmap 192.168.1.1-254 -p22 -oG - | awk '/22\//{print $2 " # " $5}'
+}
+
+function readFromCLIWithDefaultOption {
+    read -p "$1 [$2]: " result
+    if [ -z $result ]; then
+        result=$2
+    fi
+    echo $result
+}
+
+function getSuggestedNetwork {
+    echo $(ip -4 -o addr | awk ' {print $4}' | grep -v "127.0.0.1" | head -n 1)
+}
+
+function getSuggestedName {
+    date +"%Y-%m-%d-%H-%M-%S-discover-results"
+}
+
+function createFolderIfNotExists   {
+    if [ ! -d $1 ]; then
+        mkdir -p $1
+    fi
+}
+
+SUGGESTEDNETWORK=$(getSuggestedNetwork)
+SUGGESTEDNAME=$(getSuggestedName)
+
+NETWORK=$(readFromCLIWithDefaultOption "Define la red que quieres explorar" $SUGGESTEDNETWORK)
+FILENAME=$(readFromCLIWithDefaultOption "Nombre de archivo donde se guardarán los resultados" $SUGGESTEDNAME)
+FOLDER="/etc/multish/group/network-discoveries"
+
+echo "Explorando $NETWORK. Los resultados se guardarán en $FILENAME. Espere a que termine el proceso..."
+
+createFolderIfNotExists $FOLDER
+
+sudo nmap $NETWORK -p22 -oG - | awk '/22\/open/{print "root@" $2 " # " $5}' > $FOLDER/$FILENAME
+
+echo "Exploración Finalizada. Los resultados se han guardado en $FOLDER/$FILENAME"
+
+RUN=$(readFromCLIWithDefaultOption "¿Quieres conectarte ahora a los equipos encontrados? y/n " "y")
+if [[ $RUN =~ ^[YySs]$ ]]
+then
+    multish "$FOLDER/$FILENAME"
+else
+    multish
+fi
\ No newline at end of file
diff --git a/etc/multish/group/example b/usr/share/multish/files/example
similarity index 100%
rename from etc/multish/group/example
rename to usr/share/multish/files/example