diff --git a/lib/data/model/app/shell_func.dart b/lib/data/model/app/shell_func.dart
index 1b487b8e..a6431955 100644
--- a/lib/data/model/app/shell_func.dart
+++ b/lib/data/model/app/shell_func.dart
@@ -206,7 +206,7 @@ enum StatusCmdType {
 
 /// Cmds for linux server
 const _statusCmds = [
-  'echo $linuxSign',
+  'echo ${SystemType.linuxSign}',
   'date +%s',
   'cat /proc/net/dev',
   'cat /etc/*-release | grep PRETTY_NAME',
@@ -240,7 +240,7 @@ enum BSDStatusCmdType {
 
 /// Cmds for BSD server
 const _bsdStatusCmd = [
-  'echo $bsdSign',
+  'echo ${SystemType.bsdSign}',
   'date +%s',
   'netstat -ibn',
   'uname -or',
diff --git a/lib/data/model/server/system.dart b/lib/data/model/server/system.dart
index 4455d7fa..c09af22e 100644
--- a/lib/data/model/server/system.dart
+++ b/lib/data/model/server/system.dart
@@ -9,16 +9,14 @@ enum SystemType {
 
   const SystemType._(this.value);
 
+  static const linuxSign = '__linux';
+  static const bsdSign = '__bsd';
+
   static SystemType parse(String value) {
-    switch (value.trim()) {
-      case linuxSign:
-        return SystemType.linux;
-      case bsdSign:
-        return SystemType.bsd;
-      default:
-        // Fallback to linux
-        return SystemType.linux;
+    if (value.contains(bsdSign)) {
+      return SystemType.bsd;
     }
+    return SystemType.linux;
   }
 
   bool isSegmentsLenMatch(int len) => len == segmentsLen;
@@ -32,6 +30,3 @@ enum SystemType {
     }
   }
 }
-
-const linuxSign = 'linux';
-const bsdSign = 'bsd';