diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 386ea2f9a7049198af393087bae413d8fcee2ac3..0d7df38b832b03fdc5e4cdf5ab0bc684e3d1d8e8 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -147,12 +147,12 @@ int32_t tsMonitorInterval = 30;  // seconds
 
 // internal
 int32_t tscEmbedded = 0;
-char    configDir[TSDB_FILENAME_LEN] = "/etc/taos";
+char    configDir[TSDB_FILENAME_LEN] = {0};
 char    tsVnodeDir[TSDB_FILENAME_LEN] = {0};
 char    tsDnodeDir[TSDB_FILENAME_LEN] = {0};
 char    tsMnodeDir[TSDB_FILENAME_LEN] = {0};
-char    tsDataDir[TSDB_FILENAME_LEN] = "/var/lib/taos";
-char    tsScriptDir[TSDB_FILENAME_LEN] = "/etc/taos";
+char    tsDataDir[TSDB_FILENAME_LEN] = {0};
+char    tsScriptDir[TSDB_FILENAME_LEN] = {0};
 char    tsVnodeBakDir[TSDB_FILENAME_LEN] = {0};
 
 /*
diff --git a/src/os/src/alpine/alpineEnv.c b/src/os/src/alpine/alpineEnv.c
index 4f84412075766dae66e9e55831b4bf290af987e2..811d98ad7f8c34851e70ccbd190a13b74d865703 100644
--- a/src/os/src/alpine/alpineEnv.c
+++ b/src/os/src/alpine/alpineEnv.c
@@ -18,7 +18,10 @@
 #include "tglobal.h"
 
 void osInit() {
-  strcpy(configDir, "/etc/taos");
+  if (configDir[0] == 0) {
+    strcpy(configDir, "/etc/taos");
+  }
+
   strcpy(tsVnodeDir, "");
   strcpy(tsDnodeDir, "");
   strcpy(tsMnodeDir, "");
diff --git a/src/os/src/darwin/darwinEnv.c b/src/os/src/darwin/darwinEnv.c
index 7e1031a5af6e2ed59fae7fa607d1ce7fc3790043..6adebabec01ae378a4c5f3d82389508334210972 100644
--- a/src/os/src/darwin/darwinEnv.c
+++ b/src/os/src/darwin/darwinEnv.c
@@ -18,7 +18,10 @@
 #include "tglobal.h"
 
 void osInit() {
-  strcpy(configDir, "~/TDengine/cfg");
+  if (configDir[0] == 0) {
+    strcpy(configDir, "~/TDengine/cfg");
+  }
+
   strcpy(tsVnodeDir, "");
   strcpy(tsDnodeDir, "");
   strcpy(tsMnodeDir, "");
diff --git a/src/os/src/linux64/linuxEnv.c b/src/os/src/linux64/linuxEnv.c
index 4f84412075766dae66e9e55831b4bf290af987e2..811d98ad7f8c34851e70ccbd190a13b74d865703 100644
--- a/src/os/src/linux64/linuxEnv.c
+++ b/src/os/src/linux64/linuxEnv.c
@@ -18,7 +18,10 @@
 #include "tglobal.h"
 
 void osInit() {
-  strcpy(configDir, "/etc/taos");
+  if (configDir[0] == 0) {
+    strcpy(configDir, "/etc/taos");
+  }
+
   strcpy(tsVnodeDir, "");
   strcpy(tsDnodeDir, "");
   strcpy(tsMnodeDir, "");
diff --git a/src/os/src/windows/w64Env.c b/src/os/src/windows/w64Env.c
index 333871e96c5ff8038d9aa3f9f476322f4d55bd7a..c6046ecae7e369c7ae3c9198ee0727b2d3c4c653 100644
--- a/src/os/src/windows/w64Env.c
+++ b/src/os/src/windows/w64Env.c
@@ -21,7 +21,10 @@
 extern void taosWinSocketInit();
 
 void osInit() {
-  strcpy(configDir, "C:/TDengine/cfg");
+  if (configDir[0] == 0) {
+    strcpy(configDir, "~/TDengine/cfg");
+  }
+
   strcpy(tsVnodeDir, "C:/TDengine/data");
   strcpy(tsDnodeDir, "");
   strcpy(tsMnodeDir, "");