diff --git a/deploy/install b/deploy/install
index 1484142..c4cd2fb 100755
--- a/deploy/install
+++ b/deploy/install
@@ -1,12 +1,12 @@
 #!/usr/bin/env bash
+set -e
 [[ -d /tmp/sower ]] || mkdir /tmp/sower
 cd /tmp/sower
 
 echo ========    Install sower to your system    ========
-VERSION="$(curl -s "https://api.github.com/repos/wweir/sower/releases/latest" | awk -F '"'  '/tag_name/{print $4}')"
+VERSION="$(curl -s "https://api.github.com/repos/wweir/sower/releases/latest" | awk -F '"'  '/tag_name/{printf $4}')"
 
 succ_message(){
-	set +x
 	echo
 	echo ========    Installed sower to your system    ========
 	echo The config file is: /usr/local/etc/sower.toml
@@ -14,10 +14,9 @@ succ_message(){
 }
 case "$(uname -s)" in
 	"Darwin")
-		echo Please enter remote server adddress:
+		printf "Please enter remote server adddress: "
 		read ADDRESS
 		echo
-		set -x
 
 		curl -SLf https://github.com/wweir/sower/releases/download/$VERSION/sower-darwin.tar.gz | tar xzv
 
@@ -41,11 +40,10 @@ case "$(uname -s)" in
 			echo do not support auto deploy on SysVinit
 			exit 1
 		fi
-		echo Server side or client side, which do you wanna install\[c/s\]:
+		printf "Server side or client side, which do you wanna install [c/s]: "
 		read SIDE
 		echo
 
-		set -x
 		case "$SIDE" in
 			"c")
 				echo Please enter remote server adddress: