diff --git a/.functions.sh b/.functions.sh
index 141ac6b..8943ad9 100644
--- a/.functions.sh
+++ b/.functions.sh
@@ -1,5 +1,17 @@
 #!/bin/bash
 
+function k3sudo(){
+    # create a passwordless sudo rule on target 
+    # usage: k3sudo [add, del] <target ip/hostname>
+    if [[ "$1" == "add" ]];then
+        ssh -t $2 "hostname --long; echo \"$USER ALL=(ALL) NOPASSWD: ALL\" | sudo tee /etc/sudoers.d/k3sup"
+    elif [[ "$1" == "del" ]];then
+        ssh $2 sudo rm /etc/sudoers.d/k3sup
+    else
+        echo "Error: usage: k3sudo [add, del] <target ip/hostname>"
+    fi
+}
+
 function pc(){
     # use pass and copy to clipboard
     pass -c1 "$@"