diff --git a/src/kit/shell/src/shellLinux.c b/src/kit/shell/src/shellLinux.c
index 9d4de06b0fb2297412fea0fdb24c326071ee8222..94f3901dd8fa52313aa621672e9dd612759123ab 100644
--- a/src/kit/shell/src/shellLinux.c
+++ b/src/kit/shell/src/shellLinux.c
@@ -86,7 +86,7 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
         wordfree(&full_path);
         return -1;
       }
-      strcpy(configDir, full_path.we_wordv[0]);
+      tstrncpy(configDir, full_path.we_wordv[0], TSDB_FILENAME_LEN);
       wordfree(&full_path);
       break;
     case 's':
@@ -100,7 +100,7 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
         fprintf(stderr, "Invalid path %s\n", arg);
         return -1;
       }
-      strcpy(arguments->file, full_path.we_wordv[0]);
+      tstrncpy(arguments->file, full_path.we_wordv[0], TSDB_FILENAME_LEN);
       wordfree(&full_path);
       break;
     case 'D':
@@ -108,7 +108,7 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
         fprintf(stderr, "Invalid path %s\n", arg);
         return -1;
       }
-      strcpy(arguments->dir, full_path.we_wordv[0]);
+      tstrncpy(arguments->dir, full_path.we_wordv[0], TSDB_FILENAME_LEN);
       wordfree(&full_path);
       break;
     case 'T':
diff --git a/src/kit/taosdump/taosdump.c b/src/kit/taosdump/taosdump.c
index dea05e1c2a423d0b794724f8217e2216c7e24807..678de7daa78ea5d3963bb97a5fde42b8f214ac7b 100644
--- a/src/kit/taosdump/taosdump.c
+++ b/src/kit/taosdump/taosdump.c
@@ -655,7 +655,7 @@ int taosDumpDb(SDbInfo *dbInfo, SDumpArguments *arguments, FILE *fp) {
   }
 
   close(fd);
-  remove(".table.tmp");
+  (void)remove(".table.tmp");
 
   return 0;
 }
diff --git a/src/os/linux/src/linuxSysPara.c b/src/os/linux/src/linuxSysPara.c
index 04fa6b1f568d6ae0785d817e8666e86b1373ab6d..a1d013fa726c240eb42a525d6b7e8923a8e393f5 100644
--- a/src/os/linux/src/linuxSysPara.c
+++ b/src/os/linux/src/linuxSysPara.c
@@ -553,7 +553,7 @@ void taosSetCoreDump() {
   struct rlimit rlim;
   struct rlimit rlim_new;
   if (getrlimit(RLIMIT_CORE, &rlim) == 0) {
-    uPrint("the old unlimited para: rlim_cur=%" PRIu64, ", rlim_max=%" PRIu64, rlim.rlim_cur, rlim.rlim_max);
+    uPrint("the old unlimited para: rlim_cur=%" PRIu64 ", rlim_max=%" PRIu64, rlim.rlim_cur, rlim.rlim_max);
     rlim_new.rlim_cur = RLIM_INFINITY;
     rlim_new.rlim_max = RLIM_INFINITY;
     if (setrlimit(RLIMIT_CORE, &rlim_new) != 0) {
@@ -565,7 +565,7 @@ void taosSetCoreDump() {
   }
 
   if (getrlimit(RLIMIT_CORE, &rlim) == 0) {
-    uPrint("the new unlimited para: rlim_cur=%" PRIu64, ", rlim_max=%" PRIu64, rlim.rlim_cur, rlim.rlim_max);
+    uPrint("the new unlimited para: rlim_cur=%" PRIu64 ", rlim_max=%" PRIu64, rlim.rlim_cur, rlim.rlim_max);
   }
 
 #ifndef _TD_ARM_
diff --git a/src/util/inc/tutil.h b/src/util/inc/tutil.h
index 94084b5638a497e07a6ab4bd29fa51749d671dfb..23d8348cbe5def10d447af4da44aa3fdbe17d183 100644
--- a/src/util/inc/tutil.h
+++ b/src/util/inc/tutil.h
@@ -135,7 +135,7 @@ char* strtolower(char *dst, const char *src);
 
 int64_t strnatoi(char *num, int32_t len);
 
-char* strreplace(const char* str, const char* pattern, const char* rep);
+//char* strreplace(const char* str, const char* pattern, const char* rep);
 
 char *strbetween(char *string, char *begin, char *end);
 
diff --git a/src/util/src/tnote.c b/src/util/src/tnote.c
index aa618985431155cef80590bb9c4ef618b3be2704..12a7fc2b9b6174cced2446a8ebe80ebb1da97b00 100644
--- a/src/util/src/tnote.c
+++ b/src/util/src/tnote.c
@@ -208,14 +208,15 @@ int taosOpenNoteWithMaxLines(char *fn, int maxLines, int maxNoteNum, taosNoteInf
         }
     }
 
-    sprintf(name, "%s.%d", pNote->taosNoteName, pNote->taosNoteFlag);
+    char noteName[NOTE_FILE_NAME_LEN * 2] = "\0";
+    sprintf(noteName, "%s.%d", pNote->taosNoteName, pNote->taosNoteFlag);
     pthread_mutex_init(&pNote->taosNoteMutex, NULL);
 
     umask(0);
-    pNote->taosNoteFd = open(name, O_WRONLY | O_CREAT, S_IRWXU | S_IRWXG | S_IRWXO);
+    pNote->taosNoteFd = open(noteName, O_WRONLY | O_CREAT, S_IRWXU | S_IRWXG | S_IRWXO);
 
     if (pNote->taosNoteFd < 0) {
-        fprintf(stderr, "failed to open note file:%s reason:%s\n", name, strerror(errno));
+        fprintf(stderr, "failed to open note file:%s reason:%s\n", noteName, strerror(errno));
         return -1;
     }
     taosLockNote(pNote->taosNoteFd, pNote);
@@ -223,7 +224,7 @@ int taosOpenNoteWithMaxLines(char *fn, int maxLines, int maxNoteNum, taosNoteInf
     // only an estimate for number of lines
     struct stat filestat;
     if (fstat(pNote->taosNoteFd, &filestat) < 0) {
-      fprintf(stderr, "failed to fstat note file:%s reason:%s\n", name, strerror(errno));
+      fprintf(stderr, "failed to fstat note file:%s reason:%s\n", noteName, strerror(errno));
       return -1;
     }    
     size = (int)filestat.st_size;
diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index ccdf7111a7264726d35a4bf938e851b1fa5c3edf..2bfef63f846d9cebd929c4cedf2485619194113d 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -314,6 +314,7 @@ int64_t strnatoi(char *num, int32_t len) {
   return ret;
 }
 
+#if 0
 FORCE_INLINE size_t getLen(size_t old, size_t size) {
   if (old == 1) {
     old = 2;
@@ -401,6 +402,7 @@ char *strreplace(const char *str, const char *pattern, const char *rep) {
 
   return dest;
 }
+#endif
 
 char *strbetween(char *string, char *begin, char *end) {
   char *result = NULL;
diff --git a/src/util/tests/stringTest.cpp b/src/util/tests/stringTest.cpp
index 0dc1ee7a778f700c5e2d54f3dfe1325ceff06252..95fba0cd3e2b62da2b2dadb0b7e592aef5893543 100644
--- a/src/util/tests/stringTest.cpp
+++ b/src/util/tests/stringTest.cpp
@@ -26,6 +26,7 @@ TEST(testCase, string_dequote_test) {
   EXPECT_EQ(3, lx);
 }
 
+#if 0
 TEST(testCase, string_replace_test) {
   char  t3[] = "abc01abc02abc";
   char* ret = strreplace(t3, "abc", "7");
@@ -87,6 +88,7 @@ TEST(testCase, string_replace_test) {
   EXPECT_STREQ("abcdef", ret);
   free(ret);
 }
+#endif
 
 TEST(testCase, string_tolower_test) {
   char t[1024] = {1};