How to install and configure rocket chat on ubuntu 18.04 LTS

InstallingRocketChatServer.sh

##Step 1: Install MongoDB

#import the MongoDB public GPG key
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4

#Create the list file - /etc/apt/sources.list.d/mongodb-org-4.0.list
echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list

#Update the local package repository
sudo apt update

#Install the latest stable version of MongoDB
sudo apt install -y mongodb-org

# Stop,Start and Enable the service with systemcl.
sudo systemctl stop mongod.service
sudo systemctl start mongod.service
sudo systemctl enable mongod.service

#Check if the service has started properly
sudo systemctl status mongod

#Modify mongod.conf file
sudo nano /etc/mongod.conf

#Then copy and paste the lines at the end of the file and save..

replication:
 replSetName: "rs01"
 
# or 
echo -e "replication:\n  replSetName: \"rs01\"" | sudo tee -a /etc/mongod.conf

# Restart the service with systemcl
sudo systemctl restart mongod

#Check if the service has started properly
sudo systemctl status mongod

#Open MongoDB shell
mongo

#Initiates a replica set
rs.initiate()


##Step 2: Install Node.js

#Rocket.Chat only support Node.js from the 8.x repository…

sudo apt install nodejs npm build-essential curl software-properties-common graphicsmagick 

sudo npm install -g inherits n && sudo n 8.11.4

##Step 3: Install Rocket.Chat Server

sudo useradd -m -U -r -d /opt/rocketchat rocketchat
sudo su - rocketchat

curl -L https://releases.rocket.chat/latest/download -o rocket.chat.tgz

#Extract the file
tar zxvf rocket.chat.tgz

#Change bundlw to Rocket.Chat
mv bundle Rocket.Chat

#Install npm
cd /opt/rocketchat/Rocket.Chat/programs/server
npm install


export ROOT_URL=http://localhost:3000
export MONGO_URL=mongodb://localhost:27017/rocketchat
export MONGO_OPLOG_URL=mongodb://localhost:27017/local?replSet=rs01
export PORT=3000

cd /opt/rocketchat/Rocket.Chat/

node main.js

exit
exit

#Create a rocketchat service
sudo nano /etc/systemd/system/rocketchat.service

#Then copy and paste the lines below into the file and save…

[Unit]
Description=Rocket.Chat server
After=network.target nss-lookup.target mongod.target

[Service]
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=rocketchat
User=rocketchat
Environment=MONGO_URL=mongodb://localhost:27017/rocketchat MONGO_OPLOG_URL=mongodb://localhost:27017/local?replSet=rs01 ROOT_URL=http://example.com PORT=3000
ExecStart=/usr/local/bin/node /opt/rocketchat/Rocket.Chat/main.js

[Install]
WantedBy=multi-user.target


sudo systemctl daemon-reload
sudo systemctl enable rocketchat
sudo systemctl start rocketchat


sudo systemctl status rocketchat


http://localhost:3000