diff --git a/easytiersetup.sh b/easytiersetup.sh
index 2950a0a..3fe4009 100644
--- a/easytiersetup.sh
+++ b/easytiersetup.sh
@@ -1,14 +1,20 @@
+#!/bin/bash
+
 echo "==>setup easytier config"
 
-sed --debug '14curi = "tcp://39.108.52.138:11010";17cnetwork_name = "ctyuntest";18cnetwork_secret = "123456"' /opt/easytier/config/default.conf
+# 不能多行替换，需要在-i后面添加-e，并且每行替换内容前都要添加-e
+# sed -i.bak '14curi = "tcp://39.108.52.138:11010";17cnetwork_name = "ctyuntest";18cnetwork_secret = "123456"' /opt/easytier/config/default.conf
 
-# # 创建 sed 脚本
-# cat > replace.sed << 'EOF'
-# 5c新内容1
-# 8c新内容2
-# EOF
+# 创建 sed 脚本
+cat > replace.sed << 'EOF'
+14curi = "tcp://39.108.52.138:11010
+network_name = "ctyuntest"
+network_secret = "123456"
+EOF
 
-# # 执行
-# sed -i -f replace.sed 文件名
+# 执行
+sed -i.bak -f replace.sed /opt/easytier/config/default.conf
+# 可选：清理临时文件
+rm -f replace.sed
 
 echo "==>setup config done"
\ No newline at end of file