diff --git a/hosts/scripts/pgsql_backup.sh b/hosts/scripts/pgsql_backup.sh
index e75650a..ad184c1 100755
--- a/hosts/scripts/pgsql_backup.sh
+++ b/hosts/scripts/pgsql_backup.sh
@@ -40,18 +40,106 @@ if [ $srcHost != "localhost" ] || $_via_ssh_tunnel ;then
    sudo=`$ssh ${ssh_user}@$srcHost which sudo`
    su=`$ssh ${ssh_user}@$srcHost which su`
    ssh_options="-o BatchMode=yes -o ConnectTimeout=360"
+
+   if [[  -z "$psql" ]] ; then
+      echolog ""
+      echolog "\t[WARN]: Cannot determin 'psql' command on remote host '$srcHost'."
+      psql="/usr/bin/psql"
+      echolog "\t        Set 'psql' to '$psql' manually."
+   fi
+
+   if [[  -z "$pg_dump" ]] ; then
+      echolog ""
+      echolog "\t[WARN]: Cannot determin 'pg_dump' command on remote host '$srcHost'."
+      pg_dump="/usr/bin/pg_dump"
+      echolog "\t        Set 'pg_dump' to '$pg_dump' manually."
+   fi
+
+   if [[  -z "$pg_dumpall" ]] ; then
+      echolog ""
+      echolog "\t[WARN]: Cannot determin 'pg_dumpall' command on remote host '$srcHost'."
+      pg_dumpall="/usr/bin/pg_dumpall"
+      echolog "\t        Set 'pg_dumpall' to '$pg_dumpall' manually."
+   fi
+
+   if [[  -z "$sudo" ]] ; then
+      echolog ""
+      echolog "\t[WARN]: Cannot determin 'sudo' command on remote host '$srcHost'."
+      sudo="$(which sudo)"
+      [[ -z "$sudo" ]] && sudo="/usr/bin/sudo"
+      echolog "\t        Set 'sudo' to '$sudo' manually."
+   fi
+
+   if [[  -z "$su" ]] ; then
+      echolog ""
+      echolog "\t[WARN]: Cannot determin 'su' command on remote host '$srcHost'."
+      su="$(which su)"
+      [[ -z "$su" ]] && su="/usr/bin/su"
+      echolog "\t        Set 'su' to '$su' manually."
+   fi
+
 else
-   psql=`which psql`
-   pg_dump=`which pg_dump`
-   pg_dumpall=`which pg_dumpall`
-fi
+   psql="$(which psql)"
+   pg_dump="$(which pg_dump)"
+   pg_dumpall="$(which pg_dumpall)"
 
-if [ -z "$psql" ]; then
-   psql="/usr/local/pgsql/bin/psql"
-fi
+   if [[  -z "$psql" ]] ; then
+      echolog ""
+      echolog "\t[WARN]: Cannot determin 'psql' command on localhost. Try another way to determin it.."
+
+      if [[ -x "/usr/local/pgsql/bin/psql" ]] ; then
+         psql="/usr/local/pgsql/bin/psql"
+      elif [[ -x "/usr/bin/psql" ]] ; then
+         psql="/usr/bin/psql"
+      fi
+
+      if [[ -n "$psql" ]]; then
+         echolog "\t        Found executable 'psql' command: $psql ."
+      else
+         print_error_stdout "Determin 'psql' command failed on localhost."
+         echolog ""
+         echolog "\t[ERROR] Determin 'psql' command failed on localhost."
+      fi
+   fi
+
+   if [[  -z "$pg_dump" ]] ; then
+      echolog ""
+      echolog "\t[WARN]: Cannot determin 'pg_dump' command on localhost. Try another way to determin it.."
+
+      if [[ -x "/usr/local/pgsql/bin/pg_dump" ]] ; then
+         pg_dump="/usr/local/pgsql/bin/pg_dump"
+      elif [[ -x "/usr/bin/pg_dump" ]] ; then
+         pg_dump="/usr/bin/pg_dump"
+      fi
+
+      if [[ -n "$pg_dump" ]]; then
+         echolog "\t        Found executable 'pg_dump' command: $pg_dump ."
+      else
+         print_error_stdout "Determin 'pg_dump' command failed on localhost."
+         echolog ""
+         echolog "\t[ERROR] Determin 'pg_dump' command failed on localhost."
+      fi
+   fi
+
+   if [[  -z "$pg_dumpall" ]] ; then
+      echolog ""
+      echolog "\t[WARN]: Cannot determin 'pg_dumpall' command on localhost. Try another way to determin it.."
+
+      if [[ -x "/usr/local/pgsql/bin/pg_dumpall" ]] ; then
+         pg_dumpall="/usr/local/pgsql/bin/pg_dumpall"
+      elif [[ -x "/usr/bin/pg_dumpall" ]] ; then
+         pg_dumpall="/usr/bin/pg_dumpall"
+      fi
+
+      if [[ -n "$pg_dumpall" ]]; then
+         echolog "\t        Found executable 'pg_dumpall' command: $pg_dumpall ."
+      else
+         print_error_stdout "Determin 'pg_dumpall' command failed on localhost."
+         echolog ""
+         echolog "\t[ERROR] Determin 'pg_dumpall' command failed on localhost."
+      fi
+   fi
 
-if [ -z "$pg_dump" ]; then
-   pg_dump="/usr/local/pgsql/bin/pg_dump"
 fi
 
 err_msg="Determin existing databases failed"