diff --git a/useful_functions/.bash_aliases b/useful_functions/.bash_aliases
new file mode 100644
index 0000000..a653656
--- /dev/null
+++ b/useful_functions/.bash_aliases
@@ -0,0 +1,52 @@
+
+xmpp_user_rooms_count() {
+    sudo -u ejabberd ejabberdctl get_user_rooms ${1} chapril.org | wc -l
+}
+xmpp_user_contacts_count() {
+    sudo -u ejabberd ejabberdctl get_roster ${1} chapril.org | wc -l
+}
+xmpp_user_info() {
+    echo "${1}:$(xmpp_user_contacts_count ${1}):$(xmpp_user_rooms_count ${1})"
+}
+
+xmpp_users() {
+    for user in $(sudo -u ejabberd ejabberdctl registered_users chapril.org); do
+        xmpp_user_info "${user}"
+    done
+}
+
+xmpp_ban_user_by_patern() {
+    LIST=$(sudo -u ejabberd ejabberdctl registered_users chapril.org | grep ${1} | uniq)
+
+    for ADDRESS in $LIST
+    do
+        sudo -u ejabberd ejabberdctl kick_user $ADDRESS chapril.org
+        sudo -u ejabberd ejabberdctl unregister $ADDRESS chapril.org
+        echo Done with $ADDRESS
+    done
+}
+
+xmpp_send_server_notice() {
+    sudo -u ejabberd ejabberdctl send_message headline xmpp-admin@chapril.org \ 
+        chapril.org/announce/online "Annonce du Serveur" "${1}"
+}
+
+xmpp_send_server_notice_to_connected() {
+    LIST=$(sudo -u ejabberd ejabberdctl connected_users_info | cut -f 1 | cut -d "/" -f 1 | uniq)
+
+    for ADDRESS in $LIST
+    do
+        sudo -u ejabberd ejabberdctl send_message headline chapril.org "$ADDRESS" "Annonce du Serveur" "${2}"
+        echo Done with $ADDRESS
+    done
+}
+
+xmpp_send_server_notice_by_pattern() {
+    LIST=$(sudo -u ejabberd ejabberdctl registered_users chapril.org | grep ${1} | uniq)
+
+    for ADDRESS in $LIST
+    do
+        sudo -u ejabberd ejabberdctl send_message headline chapril.org "$ADDRESS" "Annonce du Serveur" "${2}"
+        echo Done with $ADDRESS
+    done
+}
diff --git a/useful_functions/functions.sh b/useful_functions/functions.sh
new file mode 100644
index 0000000..85caa5b
--- /dev/null
+++ b/useful_functions/functions.sh
@@ -0,0 +1,52 @@
+
+xmpp_user_rooms_count() {
+    sudo -u ejabberd ejabberdctl get_user_rooms ${1} chapril.org | wc -l
+}
+xmpp_user_contacts_count() {
+    sudo -u ejabberd ejabberdctl get_roster ${1} chapril.org | wc -l
+}
+xmpp_user_info() {
+    echo "${1}:$(xmpp_user_contacts_count ${1}):$(xmpp_user_rooms_count ${1})"
+}
+
+xmpp_users() {
+    for user in $(sudo -u ejabberd ejabberdctl registered_users chapril.org); do
+        xmpp_user_info "${user}"
+    done
+}
+
+xmpp_ban_users() {
+    LIST=$(sudo -u ejabberd ejabberdctl registered_users chapril.org | grep ${1} | uniq)
+
+    for ADDRESS in $LIST
+    do
+        sudo -u ejabberd ejabberdctl kick_user $ADDRESS chapril.org
+        sudo -u ejabberd ejabberdctl unregister $ADDRESS chapril.org
+        echo Done with $ADDRESS
+    done
+}
+
+xmpp_send_server_notice_all() {
+    sudo -u ejabberd ejabberdctl send_message headline xmpp-admin@chapril.org \ 
+        chapril.org/announce/online "Annonce du Serveur" "${1}"
+}
+
+xmpp_send_server_notice_connected() {
+    LIST=$(sudo -u ejabberd ejabberdctl connected_users_info | cut -f 1 | cut -d "/" -f 1 | uniq)
+
+    for ADDRESS in $LIST
+    do
+        sudo -u ejabberd ejabberdctl send_message headline chapril.org "$ADDRESS" "Annonce du Serveur" "${2}"
+        echo Done with $ADDRESS
+    done
+}
+
+xmpp_send_server_notice() {
+    LIST=$(sudo -u ejabberd ejabberdctl registered_users chapril.org | grep ${1} | uniq)
+    
+    for ADDRESS in $LIST
+    do
+        sudo -u ejabberd ejabberdctl send_message headline chapril.org "${ADDRESS}@chapril.org" "Annonce du Serveur" "${2}"
+        echo Done with $ADDRESS
+    done
+}