use updateOrAppend function

src/aws/dependencies/updateOrAppend.sh

@@ -2,11 +2,11 @@
 # If the name already exists in the file, it updates the corresponding IP.
 # If the name does not exist, it appends a new IP and name pair to the end of the file.
 # Arguments:
-#   ip: The IP address to be updated or appended.
 #   name: The name to be updated or appended.
+#   ip: The IP address to be updated or appended.
 updateOrAppend() {
-    local ip="$1"
-    local name="$2"
+    local name="$1"
+    local ip="$2"
     local file="/etc/hosts"
 
     local escaped_name=$(printf '%s\n' "$name" | sed 's:[][\/.^$*]:\\&:g')

src/aws/init.sh

@@ -188,7 +188,9 @@ function init {
 	isOpen=$(waitForOutput "ssh-keyscan -H $publicIp | grep ecdsa-sha2-nistp256")
 	echo "Opened ssh tunnel"
 
-	openSSHTunnel $publicIp $portConfigArray
+	updateOrAppend $instanceName $publicIp
+	openSSHTunnel $instanceName $portConfigArray
+
 	storeConfigIntoTreehousesConfigAsStringfiedJson $instanceName $keyName $instanceId $publicIp $groupName
 }
 

src/aws/restart.sh

@@ -30,5 +30,5 @@ function restart(){
     echo "the new ip address is $publicIp"
     updateIPAddress $balloonName $publicIp
 
-    replaceIp $oldPublicIp $publicIp
+	updateOrAppend $instanceName $publicIp
 }