diff --git a/setup.sh b/setup.sh
index ce7fa4c..fb71fdf 100755
--- a/setup.sh
+++ b/setup.sh
@@ -3,7 +3,7 @@
 # Check root
 if [ `whoami` != "root" ];then
 	echo -e "\nYou need to be root to perform this command. \n"
-  exit 0
+  exit 4
 fi
 
 os=$(uname | tr '[:upper:]' '[:lower:]')
@@ -11,8 +11,7 @@ os=$(uname | tr '[:upper:]' '[:lower:]')
 platform() {
   local support_os=("darwin" "linux" "freebsd")
   
-  if [[ "$os" == ${support_os[0]} || "$os" == ${support_os[1]} || "$os" == ${support_os[2]} ]]
-  then
+  if [[ "$os" == ${support_os[0]} || "$os" == ${support_os[1]} || "$os" == ${support_os[2]} ]]; then
     echo $os
   else
     echo "no"
@@ -28,10 +27,6 @@ arch() {
     ;;
     "x86") out="386"
     ;;
-    # "armv7l") out="armv7l"
-    # ;;
-    # "amd64") out="amd64"
-    # ;;
     *) out=res
     ;;
   esac
@@ -39,16 +34,12 @@ arch() {
   echo $out
 }
 
-getLatestVersion() {
-  local res=$(curl -s https://server-0.sercretcore.cn/api/download\?arch=`arch`\&platform=`platform`)
-  local status=$(echo "${res}" | grep -Eo '"status":.*?[^\\]' | sed 's/"status"://g')
-
-  if [ ${status} == 1 ]
-  then
-    local downloadURL=$(echo "${res}" | grep -Eo '"downloadURL":.*?[^\\]",' | sed 's/"downloadURL":"//g' | sed 's/",//g')
-    echo ${downloadURL}
+grepCross() {
+  local out=$(grep --version | grep -o "FreeBSD")
+  if [[ $out == "FreeBSD" ]]; then
+    echo $(grep -Eo "$@")
   else
-    echo "no"
+    echo $(grep -Po "$@")
   fi
 }
 
@@ -58,7 +49,7 @@ cmdhas() {
 
 download() {
   if cmdhas "curl"; then
-    sudo curl --compressed -q "$@"
+    curl --compressed -q "$@"
   elif cmdhas "wget"; then
     # Emulate curl with wget
     ARGS=$(echo "$*" | command sed -e 's/--progress-bar /--progress=bar /' \
@@ -69,21 +60,43 @@ download() {
                             -e 's/-o /-O /' \
                             -e 's/-C - /-c /')
     # shellcheck disable=SC2086
-    eval sudo wget $ARGS
+    eval wget $ARGS
+  fi
+}
+
+getLatestVersion() {
+  local platformValue=`platform`
+  
+  if [[ platformValue == "no" ]]; then
+    echo -e "\nThis operating system is not supported.\n"
+    exit 10
+  elif [[ platformValue == "freebsd" ]]; then
+    echo -e "\nFreeBSD system is not supported for the time being.\n"
+    exit 10
+  fi
+
+  local res=$(download -s https://server-0.sercretcore.cn/api/download\?arch=`arch`\&platform=`platform`)
+  local status=$(echo "${res}" | grepCross '"status":.' | sed 's/"status"://g')
+
+  if [[ "${status}" == "1" ]]; then
+    local downloadURL=$(echo "${res}" | grepCross '"downloadURL":".*?[^\\]",' | sed 's/"downloadURL":"//g' | sed 's/",//g')
+    echo ${downloadURL}
+  else
+    echo "no"
   fi
 }
 
 Install() {
   downloadURL=`getLatestVersion` 
   echo ${downloadURL}
-  if [[ "${downloadURL}" != "no" ]]
-  then
+  if [[ "${downloadURL}" != "no" ]]; then
     mkdir -p /usr/local/dc-agent/bin
     mkdir -p /usr/local/dc-agent/log
 
     download "${downloadURL}" -o "/usr/local/dc-agent/bin/dc-agent"
+    echo -e "\n"
 
-    chmod +x /usr/local/dc-agent/bin/dc-agent
+    sudo chmod 755 /usr/local/dc-agent/bin/dc-agent
     sudo /usr/local/dc-agent/bin/dc-agent install
     sudo /usr/local/dc-agent/bin/dc-agent start
   else