diff --git a/install_orbit_environment.sh b/install_orbit_environment.sh
index e192287..c39251a 100644
--- a/install_orbit_environment.sh
+++ b/install_orbit_environment.sh
@@ -18,18 +18,52 @@ if [ -z "$(grep 'orbit_sites' nginx.conf)" ]; then
 	sudo sed -i 's/\(include\ \/etc\/nginx\/sites-enabled\/\*\;\)/\1\n\tinclude\ \/etc\/nginx\/orbit_sites\/*;/g' nginx.conf
 fi
 cd $org_pwd
+sudo apt-get install gnupg -y
+wget -qO - https://www.mongodb.org/static/pgp/server-5.0.asc | sudo apt-key add -
+# install mongod 5.0
 if [[ $ubuntu_version =~ '20' ]] || [[ $ubuntu_version =~ '21' ]]; then
 	sudo wget -nc http://archive.ubuntu.com/ubuntu/pool/main/o/openssl1.0/libssl1.0-dev_1.0.2n-1ubuntu5.7_amd64.deb
 	sudo dpkg -i libssl1.0-dev_1.0.2n-1ubuntu5.7_amd64.deb
 	sudo wget -nc http://archive.ubuntu.com/ubuntu/pool/main/o/openssl1.0/libssl1.0.0_1.0.2n-1ubuntu5.7_amd64.deb
 	sudo dpkg -i libssl1.0.0_1.0.2n-1ubuntu5.7_amd64.deb
-	# install mongod 5.0
-	wget -qO - https://www.mongodb.org/static/pgp/server-5.0.asc | sudo apt-key add -
-	sudo apt-get install gnupg -y
 	echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/5.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-5.0.list
-	sudo apt-get update
-	sudo apt-get install -y mongodb-org=5.0.6 mongodb-org-database=5.0.6 mongodb-org-server=5.0.6 mongodb-org-shell=5.0.6 mongodb-org-mongos=5.0.6 mongodb-org-tools=5.0.6
-	sudo service mongod restart
+elif [[ $ubuntu_version =~ '18' ]] || [[ $ubuntu_version =~ '19' ]]; then
+	echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/5.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-5.0.list
+else
+	echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/5.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-5.0.list
+fi
+sudo apt-get update
+sudo apt-get install -y mongodb-org=5.0.6 mongodb-org-database=5.0.6 mongodb-org-server=5.0.6 mongodb-org-shell=5.0.6 mongodb-org-mongos=5.0.6 mongodb-org-tools=5.0.6
+sudo service mongod stop
+sudo rm -f /var/lib/mongodb/mongod.lock
+sudo rm -f /tmp/mongodb-27017.sock
+sudo chown mongodb:mongodb /var/lib/mongodb -R
+sudo chown mongodb:mongodb /var/log/mongodb -R
+sudo service mongod restart
+if [ -f /tmp/mongodb-27017.sock ]; then
+	echo "Mongo start success!"
+else
+	mongo
+	exit_code="$(echo $?)"
+	#if mongo 5 core dump, then install mongo 4.4
+	if [ $exit_code != 0 ] && [ $exit_code != 1 ]; then
+		sudo apt-get purge mongodb-org* -y
+		sudo rm -rf /var/log/mongodb
+		sudo rm -rf /var/lib/mongodb
+		wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -
+		if [[ $ubuntu_version =~ '20' ]] || [[ $ubuntu_version =~ '21' ]]; then
+			echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list
+		elif [[ $ubuntu_version =~ '18' ]] || [[ $ubuntu_version =~ '19' ]]; then
+			echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list
+		else
+			echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list
+		fi
+		sudo apt-get update
+		sudo apt-get install -y mongodb-org=4.4.11 mongodb-org-server=4.4.11 mongodb-org-shell=4.4.11 mongodb-org-mongos=4.4.11 mongodb-org-tools=4.4.11
+	else
+		echo "mongo not yet start!"
+		echo "Please check mongo status!"
+	fi
 fi
 # build ImageMagick and install
 if [ -z $(which convert) ]; then
@@ -71,9 +105,7 @@ source "/etc/profile.d/rvm.sh"
 # install ruby 2.1.10
 rvm install 2.1.10
 rvm --default use 2.1.10
-if [[ $ubuntu_version =~ '20' ]] || [[ $ubuntu_version =~ '21' ]]; then
-	gem install nokogiri -v 1.7.0.1
-fi
+gem install nokogiri -v 1.7.0.1
 sudo apt-get install screen -y
 sudo sed -i 's/#cron\.\*/cron\.\*/g' /etc/rsyslog.d/50-default.conf
 sudo service rsyslog restart