diff --git a/script/gs_check b/script/gs_check
index 486a57d556f34be3399f147bdf3f218d9c953c11..25adb11c5df404c51df91563a94ab240111b12ce 100644
--- a/script/gs_check
+++ b/script/gs_check
@@ -27,15 +27,6 @@ import getpass
 import time
 import pwd
 import pickle
-package_path = os.path.dirname(os.path.realpath(__file__))
-ld_path = package_path + "/gspylib/clib"
-if 'LD_LIBRARY_PATH' not in os.environ:
-    os.environ['LD_LIBRARY_PATH'] = ld_path
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-if not os.environ.get('LD_LIBRARY_PATH').startswith(ld_path):
-    os.environ['LD_LIBRARY_PATH'] = \
-        ld_path + ":" + os.environ['LD_LIBRARY_PATH']
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
 
 import xml.etree.cElementTree as ETree
 from datetime import datetime, timedelta
diff --git a/script/gs_dropnode b/script/gs_dropnode
index fb915fb05dddf56a6b52f2a5352f53f1cff15b20..d2fe05196a7bea8f22a8008cd8497c4bfa3f20b7 100644
--- a/script/gs_dropnode
+++ b/script/gs_dropnode
@@ -26,16 +26,7 @@ import subprocess
 import sys
 import pwd
 import grp
-package_path = os.path.dirname(os.path.realpath(__file__))
-ld_path = package_path + "/gspylib/clib"
-if 'LD_LIBRARY_PATH' not in os.environ:
-    os.environ['LD_LIBRARY_PATH'] = ld_path
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-if not os.environ.get('LD_LIBRARY_PATH').startswith(ld_path):
-    os.environ['LD_LIBRARY_PATH'] = \
-        ld_path + ":" + os.environ['LD_LIBRARY_PATH']
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-    
+
 sys.path.append(sys.path[0])
 from gspylib.common.DbClusterInfo import dbClusterInfo
 from gspylib.common.DbClusterStatus import DbClusterStatus
diff --git a/script/gs_expansion b/script/gs_expansion
index 1fe22d617d7f019aac8138758e20f9250e50a09a..12ceb32c19b0352a2545197b12bc725234993627 100644
--- a/script/gs_expansion
+++ b/script/gs_expansion
@@ -23,15 +23,6 @@ import os
 import sys
 import subprocess
 import socket
-package_path = os.path.dirname(os.path.realpath(__file__))
-ld_path = package_path + "/gspylib/clib"
-if 'LD_LIBRARY_PATH' not in os.environ:
-    os.environ['LD_LIBRARY_PATH'] = ld_path
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-if not os.environ.get('LD_LIBRARY_PATH').startswith(ld_path):
-    os.environ['LD_LIBRARY_PATH'] = \
-        ld_path + ":" + os.environ['LD_LIBRARY_PATH']
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
 
 sys.path.append(sys.path[0])
 from gspylib.common.DbClusterInfo import dbClusterInfo, \
diff --git a/script/gs_install b/script/gs_install
index e4ec0c82c86b75a567eb7fde9e9cff919ca7da0d..a7152cf67df6b948f8657230ab503013fb730ead 100644
--- a/script/gs_install
+++ b/script/gs_install
@@ -21,15 +21,6 @@
 
 import os
 import sys
-package_path = os.path.dirname(os.path.realpath(__file__))
-ld_path = package_path + "/gspylib/clib"
-if 'LD_LIBRARY_PATH' not in os.environ:
-    os.environ['LD_LIBRARY_PATH'] = ld_path
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-if not os.environ.get('LD_LIBRARY_PATH').startswith(ld_path):
-    os.environ['LD_LIBRARY_PATH'] = \
-        ld_path + ":" + os.environ['LD_LIBRARY_PATH']
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
 
 sys.path.append(sys.path[0])
 from gspylib.common.GaussLog import GaussLog
diff --git a/script/gs_postuninstall b/script/gs_postuninstall
index 0f1b6db95c51d5730feb01356c0c19838b061a2e..b72a39136faee312255877411c8a77bd85b81a39 100644
--- a/script/gs_postuninstall
+++ b/script/gs_postuninstall
@@ -25,17 +25,6 @@ import subprocess
 import grp
 import pwd
 
-package_path = os.path.dirname(os.path.realpath(__file__))
-ld_path = package_path + "/gspylib/clib"
-if 'LD_LIBRARY_PATH' not in os.environ:
-    os.environ['LD_LIBRARY_PATH'] = ld_path
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-if not os.environ.get('LD_LIBRARY_PATH').startswith(ld_path):
-    os.environ['LD_LIBRARY_PATH'] = \
-        ld_path + ":" + os.environ['LD_LIBRARY_PATH']
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-
-
 from gspylib.common.GaussLog import GaussLog
 from gspylib.common.Common import DefaultValue
 from gspylib.common.ErrorCode import ErrorCode
diff --git a/script/gs_preinstall b/script/gs_preinstall
index 98512b2af3333af4256f39ff953968bf83a070c6..b49b7fab0991a5096cd74ab86264d3ec1bcdf424 100644
--- a/script/gs_preinstall
+++ b/script/gs_preinstall
@@ -425,26 +425,6 @@ General options:
         # skip OS check
         self.checkskipOS()
 
-    # set LD_LIBRARY_PATH add local lib
-    def setLibPath(self):
-        package_path = os.path.dirname(os.path.realpath(__file__))
-        ld_path = package_path + "/gspylib/clib"
-        rerun = True
-
-        if 'LD_LIBRARY_PATH' not in os.environ:
-            os.environ['LD_LIBRARY_PATH'] = ld_path
-        elif not os.environ.get('LD_LIBRARY_PATH').startswith(ld_path):
-            os.environ['LD_LIBRARY_PATH'] = \
-                ld_path + ":" + os.environ['LD_LIBRARY_PATH']
-        else:
-            rerun = False
-
-        if rerun:
-            try:
-                os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-            except Exception as e:
-                GaussLog.exitWithError(str(e))
-
     # decompress version.cfg from bz2
     def decompressVersioncfg(self):
         bin_cmd = 'tar -xpf `head -1 version.cfg`*.tar.bz2 ./version.cfg'
@@ -625,8 +605,6 @@ if __name__ == '__main__':
     try:
         # Objectize class
         preinstall = Preinstall()
-        # set LD_LIBRARY_PATH
-        preinstall.setLibPath()
         # parse cmd lines
         preinstall.parseCommandLine()
         # check parameters
diff --git a/script/gs_ssh b/script/gs_ssh
index b8d01aa9bca5e5f7d5c3e9b651c3d3680ae22d31..41ee6e455e0711c803d5232a34f1aa7b99657542 100644
--- a/script/gs_ssh
+++ b/script/gs_ssh
@@ -21,16 +21,6 @@
 import os
 import sys
 import socket
-from unittest import expectedFailure
-package_path = os.path.dirname(os.path.realpath(__file__))
-ld_path = package_path + "/gspylib/clib"
-if 'LD_LIBRARY_PATH' not in os.environ:
-    os.environ['LD_LIBRARY_PATH'] = ld_path
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-if not os.environ.get('LD_LIBRARY_PATH').startswith(ld_path):
-    os.environ['LD_LIBRARY_PATH'] = \
-        ld_path + ":" + os.environ['LD_LIBRARY_PATH']
-    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
 
 from gspylib.common.GaussLog import GaussLog
 from gspylib.common.Common import DefaultValue
diff --git a/script/gs_sshexkey b/script/gs_sshexkey
index d6ee117b1079aa40021e2a416e517cb20711d7ee..365b1ae3705613a8baf2453bbe4cc24622ff0dd6 100644
--- a/script/gs_sshexkey
+++ b/script/gs_sshexkey
@@ -55,22 +55,7 @@ DefaultValue.doConfigForParamiko()
 try:
     import paramiko
 except ImportError as ex:
-    try:
-        local_path = os.path.dirname(os.path.realpath(__file__))
-        clib_path = os.path.realpath(os.path.join(local_path, "gspylib/clib/"))
-        ld_path = os.getenv("LD_LIBRARY_PATH")
-        if not ld_path or not ld_path.startswith(clib_path):
-            if not ld_path:
-                os.environ['LD_LIBRARY_PATH'] = clib_path
-            else:
-                os.environ['LD_LIBRARY_PATH'] = clib_path + ":" + ld_path
-        try:
-            os.execl(sys.executable, sys.executable, *sys.argv)
-        except Exception as ex:
-            sys.exit("Failed to set the enviroment variable: %s" % str(ex))
-        import paramiko
-    except ImportError as ex:
-            raise Exception(ErrorCode.GAUSS_522["GAUSS_52200"] % str(ex))
+    raise Exception(ErrorCode.GAUSS_522["GAUSS_52200"] % str(ex))
 from gspylib.threads.SshTool import SshTool
 
 HOSTS_MAPPING_FLAG = "#Gauss OM IP Hosts Mapping"
diff --git a/script/gspylib/__init__.py b/script/gspylib/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..04b1b5a7bf0d08a274cf000fd64367f8b4cb1c41 100644
--- a/script/gspylib/__init__.py
+++ b/script/gspylib/__init__.py
@@ -0,0 +1,33 @@
+# coding: utf-8
+
+import os
+import sys
+
+
+ENV_LD_LIBRARY_PATH = 'LD_LIBRARY_PATH'
+
+
+def ensure_ld_library_path():
+    gspylib_dir = os.path.dirname(os.path.realpath(__file__))
+    clib_path = os.path.join(gspylib_dir, 'clib')
+    if  ENV_LD_LIBRARY_PATH in os.environ and \
+        os.environ[ENV_LD_LIBRARY_PATH].startswith(clib_path):
+        return
+
+    raw_value = os.environ.get(ENV_LD_LIBRARY_PATH, "")
+    libs = [clib_path]
+    if 'GAUSSHOME' in os.environ:
+        libs.append(os.path.join(os.environ['GAUSSHOME'], 'lib'))
+    if raw_value:
+        libs.append(raw_value)
+    ld_path = ":".join(libs)
+    os.environ['LD_LIBRARY_PATH'] = ld_path
+    try:
+        os.execv(sys.argv[0], sys.argv)
+    except Exception as exc:
+        print('failed re-exec:', exc)
+        sys.exit(1)
+
+
+# auto invoked while gspylib imported
+ensure_ld_library_path()
diff --git a/script/gspylib/threads/SshTool.py b/script/gspylib/threads/SshTool.py
index f3cc4b0d7f7567bcfdba1ee8c9a7d6ebc9968e8c..34f8149d6c27aec55a8f203724251fc1153095e4 100644
--- a/script/gspylib/threads/SshTool.py
+++ b/script/gspylib/threads/SshTool.py
@@ -41,23 +41,7 @@ from gspylib.common.Constants import Constants
 try:
     import paramiko
 except ImportError as ex:
-    print(ex)
-    try:
-        local_path = os.path.dirname(os.path.realpath(__file__))
-        clib_path = os.path.realpath(os.path.join(local_path, "../../gspylib/clib/"))
-        ld_path = os.getenv("LD_LIBRARY_PATH")
-        if not ld_path or not ld_path.startswith(clib_path):
-            if not ld_path:
-                os.environ['LD_LIBRARY_PATH'] = clib_path
-            else:
-                os.environ['LD_LIBRARY_PATH'] = clib_path + ":" + ld_path
-        try:
-            os.execl(sys.executable, sys.executable, *sys.argv)
-        except Exception as ex:
-            sys.exit("Failed to set the enviroment variable: %s" % str(ex))
-        import paramiko
-    except ImportError as ex:
-            raise Exception(ErrorCode.GAUSS_522["GAUSS_52200"] % str(ex))
+    raise Exception(ErrorCode.GAUSS_522["GAUSS_52200"] % str(ex))
 
 class SshTool():
     """
diff --git a/script/local/PreInstallUtility.py b/script/local/PreInstallUtility.py
index 0e01146042c57f3c98609ab4e2140fbbe1a0886b..d3958fde4a5d8fe4978a72b2a9813d951012b6dd 100644
--- a/script/local/PreInstallUtility.py
+++ b/script/local/PreInstallUtility.py
@@ -1719,15 +1719,6 @@ Common options:
             self.logger.logExit(ErrorCode.GAUSS_502["GAUSS_50217"] % bz2FileName +
                                 " Error: \n%s" % output)
 
-        # load library path env
-        ld_path = os.path.join(libCgroupPath, "lib")
-        if 'LD_LIBRARY_PATH' not in os.environ:
-            os.environ['LD_LIBRARY_PATH'] = ld_path
-            os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-        if not os.environ.get('LD_LIBRARY_PATH').startswith(ld_path):
-            os.environ['LD_LIBRARY_PATH'] = ld_path + ":" + os.environ['LD_LIBRARY_PATH']
-            os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-
     def setCgroup(self):
         """
         function: Setting Cgroup