diff --git a/swap_file_size_change.sh b/swap_file_size_change.sh
old mode 100644
new mode 100755
index 74fcf77..8c5d86c
--- a/swap_file_size_change.sh
+++ b/swap_file_size_change.sh
@@ -1,5 +1,11 @@
 #!/bin/bash
-sudo swapoff $1
+if [ -e $1 ]
+then
+	sudo swapoff $1
+	sudo rm $1
+fi
+sudo touch $1
+sudo chmod 600 $1
 sudo fallocate -l $2 $1
 sudo mkswap $1
-sudo swapon $1
+sudo swapon $1
\ No newline at end of file