diff --git a/app/scantool/main.cpp b/app/scantool/main.cpp
index 211af869..6b6449be 100644
--- a/app/scantool/main.cpp
+++ b/app/scantool/main.cpp
@@ -2,6 +2,14 @@
 #include <QApplication>
 #include "base/HGDef.h"
 #include <QTranslator>
+#include <QFile>
+
+#if !defined (HG_CMP_MSC)
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/file.h>
+#endif
+
 #include "log/log.h"
 HLOG g_hLog = nullptr;
 
@@ -37,6 +45,25 @@ int main(int argc, char *argv[])
         CloseHandle(hMutex);
         return -1;
     }
+#else
+    const QString lockFilePath = "/tmp/HGScanTool.lock";
+    QFile lockFile(lockFilePath);
+
+    if (!lockFile.open(QIODevice::ReadWrite | QIODevice::Unbuffered))
+    {
+        return 0;
+    }
+    int fd = lockFile.handle();
+    struct flock lock;
+    lock.l_type = F_WRLCK;
+    lock.l_whence = SEEK_SET;
+    lock.l_start = 0;
+    lock.l_len = 0;
+    if (fcntl(fd, F_SETLK, &lock) == -1)
+    {
+        lockFile.close();
+        return 0;
+    }
 #endif
 
     QTranslator translator_qt;
@@ -55,6 +82,10 @@ int main(int argc, char *argv[])
 
 #ifdef HG_CMP_MSC
     CloseHandle(hMutex);
+#else
+    lock.l_type = F_UNLCK;
+    fcntl(fd, F_SETLK, &lock);
+    lockFile.close();
 #endif
     return ret;
 }