diff --git a/packaging/tools/install.sh b/packaging/tools/install.sh
index 4be179b04d7241895c08b5b1d0e62ebef9603d09..dfdbaa6fdd634679d45b1fa3eeaa5aabdea36a23 100755
--- a/packaging/tools/install.sh
+++ b/packaging/tools/install.sh
@@ -210,8 +210,8 @@ function install_bin() {
   [ -x ${install_main_dir}/bin/${serverName} ] && ${csudo}ln -s ${install_main_dir}/bin/${serverName} ${bin_link_dir}/${serverName} || :
   [ -x ${install_main_dir}/bin/${udfdName} ] && ${csudo}ln -s ${install_main_dir}/bin/${udfdName} ${bin_link_dir}/${udfdName} || :
   [ -x ${install_main_dir}/bin/${adapterName} ] && ${csudo}ln -s ${install_main_dir}/bin/${adapterName} ${bin_link_dir}/${adapterName} || :
-  [ -x ${install_main_dir}/bin/${benchmarkName} ] && ${csudo}ln -s ${install_main_dir}/bin/${benchmarkName} ${bin_link_dir}/${demoName} || :
-  [ -x ${install_main_dir}/bin/${benchmarkName} ] && ${csudo}ln -s ${install_main_dir}/bin/${benchmarkName} ${bin_link_dir}/${benchmarkName} || :
+  [ -x ${install_main_dir}/bin/${benchmarkName} ] && ${csudo}ln -sf ${install_main_dir}/bin/${benchmarkName} ${bin_link_dir}/${demoName} || :
+  [ -x ${install_main_dir}/bin/${benchmarkName} ] && ${csudo}ln -sf ${install_main_dir}/bin/${benchmarkName} ${bin_link_dir}/${benchmarkName} || :
   [ -x ${install_main_dir}/bin/${dumpName} ] && ${csudo}ln -s ${install_main_dir}/bin/${dumpName} ${bin_link_dir}/${dumpName} || :
   [ -x ${install_main_dir}/bin/${xname} ] && ${csudo}ln -s ${install_main_dir}/bin/${xname} ${bin_link_dir}/${xname} || :
   [ -x ${install_main_dir}/bin/TDinsight.sh ] && ${csudo}ln -s ${install_main_dir}/bin/TDinsight.sh ${bin_link_dir}/TDinsight.sh || :
@@ -746,7 +746,7 @@ function is_version_compatible() {
 deb_erase() {
   confirm=""
   while [ "" == "${confirm}" ]; do
-    echo -e -n "${RED}Exist tdengine deb detected, do you want to remove it? [yes|no] ${NC}:"
+    echo -e -n "${RED}Existing TDengine deb is detected, do you want to remove it? [yes|no] ${NC}:"
     read confirm
     if [ "yes" == "$confirm" ]; then
       ${csudo}dpkg --remove tdengine ||:
@@ -760,7 +760,7 @@ deb_erase() {
 rpm_erase() {
   confirm=""
   while [ "" == "${confirm}" ]; do
-    echo -e -n "${RED}Exist tdengine rpm detected, do you want to remove it? [yes|no] ${NC}:"
+    echo -e -n "${RED}Existing TDengine rpm is detected, do you want to remove it? [yes|no] ${NC}:"
     read confirm
     if [ "yes" == "$confirm" ]; then
       ${csudo}rpm -e tdengine ||:
@@ -787,7 +787,7 @@ function updateProduct() {
   if echo $osinfo | grep -qwi "centos"; then
     rpm -q tdengine 2>&1 > /dev/null && rpm_erase tdengine ||:
   elif echo $osinfo | grep -qwi "ubuntu"; then
-    dpkg -l tdengine 2>&1 > /dev/null && deb_erase tdengine ||:
+    dpkg -l tdengine 2>&1 | grep ii > /dev/null && deb_erase tdengine ||:
   fi
 
   tar -zxf ${tarName}