fix5: fix function start_v2ray

install-release.sh

@@ -388,17 +388,13 @@ install_startup_service_file() {
 
 start_v2ray() {
     if [[ -f '/etc/systemd/system/v2ray.service' ]]; then
-        if [[ -z "$V2RAY_CUSTOMIZE" ]]; then
-            systemctl start v2ray
+        if systemctl start "${V2RAY_CUSTOMIZE:-v2ray}"; then
+            echo 'info: Start the V2Ray service.'
         else
-            systemctl start "$V2RAY_CUSTOMIZE"
+            echo 'error: Failed to start V2Ray service.'
+            exit 1
         fi
     fi
-    if [[ "$?" -ne 0 ]]; then
-        echo 'error: Failed to start V2Ray service.'
-        exit 1
-    fi
-    echo 'info: Start the V2Ray service.'
 }
 
 stop_v2ray() {