diff --git a/bin/v-backup-users b/bin/v-backup-users
index 640c19162..5b9f75f47 100755
--- a/bin/v-backup-users
+++ b/bin/v-backup-users
@@ -4,6 +4,14 @@
 #
 # The function backups all system users.
 
+scriptname="v-backup-users"
+pidof -x "$scriptname"
+for pid in $(pidof -x "$scriptname"); do
+    if [ $pid != $$ ]; then
+        echo "[$(date)] : $scriptname : Process is already running with PID $pid"
+        exit 1
+    fi
+done
 
 #----------------------------------------------------------#
 #                    Variable&Function                     #