Nodejs

Client Installation

Install Node

• Node Web site link [1]

From Source

• Download Tar "node-v0.10.35.tar.gz" (version number may be different
• untar tar -zxvf node-v0.10.35.tar.gz
• cd node-v0.10.35
• Run configure : ./configure
• Run make : make
• Run make with install : sudo make install

From lastest PPA

• Get the last PPA information

curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash - 

• Install node and requirement for buiding

 sudo apt-get install -y nodejs build-essential

Install Express

• sudo npm install -g express-generator

First App

• Create your app directory mkdir myapp
• Go into directory : cd myapp
• Run express : express
• Run npm  : npm install
• test App : npm start
• try http://localhost:3000

Tricks

Update Version (package.json)

npm-check-updates -u

Update Dependencies

npm install

Stop Restart with nodemon

nodemon

nodemon --debug

Error ENOSPC Increase number of file watches

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

Database Driver Installation

cd /opt/oracle
unzip instantclient-basic-linux.x64-12.1.0.2.0.zip
unzip instantclient-sdk-linux.x64-12.1.0.2.0.zip
mv instantclient_12_1 instantclient
cd instantclient
ln -s libclntsh.so.12.1 libclntsh.so
export OCI_LIB_DIR=/opt/oracle/instantclient
export OCI_INC_DIR=/opt/oracle/instantclient/sdk/include
npm install oracledb

Server Installation

pm2 Installation

• Install pm2 application

sudo npm install pm2 -g 

• Copy init Script

pm2 startup ubuntu

• Adjust init Script (if necessary)

 vi /etc/init.d/pm2-init.sh

pm2 Main commandes

• Start application: from inside the application folder
  • Fork Mode

pm2 start bin/www 
or pm2 start app.js

• • Cluster Mode

pm2 start bin/www -i 0
or pm2 start app.js -i 0

• List all runnng application

pm2 save

• Display detailed information of an application

pm2 describe 0

• Save current runnng application

pm2 list

• Stop application

pm2 stop "id" 

• Remove application

pm2 delete "id" 

• Start web interface port 9615 (localhost:9615)

pm2 web

• Stop pm2 (kill all

pm2 kill

TroubleShoot

npm issues

• "User Root does not have permission to access the dev dir ..."

sudo npm install --unsafe-perm