diff --git a/install.sh b/install.sh
index 75806f0..aabf60c 100644
--- a/install.sh
+++ b/install.sh
@@ -264,7 +264,7 @@ initTLSNginxConfig(){
 }
 # 检查ip
 checkIP(){
-    pingIP=`ping -c 1 -W 1000 ${domain}|sed '1{s/[^(]*(//;s/).*//;q}'`
+    pingIP=`ping -c 1 -W 1000 ${domain}|sed '1{s/[^(]*(//;s/).*//;q;}'`
     if [[ ! -z "${pingIP}" ]] && [[ `echo ${pingIP}|grep '^\([1-9]\|[1-9][0-9]\|1[0-9][0-9]\|2[0-4][0-9]\|25[0-5]\)\.\([0-9]\|[1-9][0-9]\|1[0-9][0-9]\|2[0-4][0-9]\|25[0-5]\)\.\([0-9]\|[1-9][0-9]\|1[0-9][0-9]\|2[0-4][0-9]\|25[0-5]\)\.\([0-9]\|[1-9][0-9]\|1[0-9][0-9]\|2[0-4][0-9]\|25[0-5]\)$'` ]]
     then
         read -p "当前域名的IP为 [${pingIP}]，是否正确[y/n]？" domainStatus