Lỗi và Giải Pháp

DISPLAY và DNS puppeteer trên vagrant virtualbox
Lỗi thường gặp: 

 

 Missing X server or $DISPLAY 

 Unable to open X display 

 Could not find Chrome (ver....) 

 

 npm install puppeteer

sudo apt-get install libnss3-dev

sudo apt-get install -y gconf-service libasound2 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget libgbm-dev

sudo apt-get install -y xvfb

sudo apt-get -y install xorg xvfb gtk2-engines-pixbuf

sudo apt-get -y install dbus-x11 xfonts-base xfonts-100dpi xfonts-75dpi xfonts-cyrillic xfonts-scalable

sudo apt-get -y install imagemagick x11-apps

Xvfb -ac :99 -screen 0 1280x1024x16 &

export DISPLAY=:99 

 Lỗi DNS error: 

 

 ERR! code EAI_AGAIN 

 ERR! request to https://registry.npmjs.org/puppeteer failed, reason: getaddrinfo EAI_AGAIN registry.npmjs.org 

 

 npm config rm proxy

npm config rm https-proxy --tried removing npm proxy

sudo vi /etc/resolv.conf

 

 

 Điền thêm dns name resolver vào, bên dưới nameserver đầu tiên: 

 nameserver 127.0.0.53

nameserver 192.168.1.11

options edns0 trust-ad 

 Ref: 

 https://stackoverflow.com/questions/60304251/unable-to-open-x-display-when-trying-to-run-google-chrome-on-centos-rhel-7-5 

  

Yarn Command vs NPM Command
Use the following command : 

 yarn add [package_name]

 

 Comparing npm and Yarn Commands 

 Install dependencies 

 npm install => yarn 

 

 Install a package 

 npm install [package_name] => yarn add [package_name]

 

 Install a package globally 

 npm install -g [package_name] => yarn global add [package_name]

 

 Install a package as a development dependency 

 npm install --save-dev [package_name] => yarn add --dev [package_name]

 

 Uninstall a package 

 npm uninstall [package_name] => yarn remove [package_name]

 

 Uninstall a package globally 

 npm uninstall -g [package_name] => yarn global remove [package_name]

 

 Uninstall a development dependency package 

 npm uninstall --save-dev [package_name] => yarn remove [package_name]

 

 Update the dependencies 

 npm update => yarn upgrade 

 

 Update a package 

 npm update [package_name] => yarn upgrade [package_name]

 

 Create a new package 

 npm init => yarn init

 

 Run a script defined in the package.json 

 npm run => yarn run

 

 Test a package 

 npm test => yarn test

 

 Publish a package 

 npm publish => yarn publish

 

 Remove all data from the cache 

 npm cache clean => yarn cache clean

Error while loading shared libraries: libnss3.so
Lỗi này thường xuất hiện khi bạn cài puppeteer trên ubuntu mới. 

 Thử command sau đây 

 sudo apt-get install libasound2 

 Không được thì thử cái này: 

 sudo apt install libgconf-2-4 libatk1.0-0 libatk-bridge2.0-0 libgdk-pixbuf2.0-0 libgtk-3-0 libgbm-dev libnss3-dev libxss-dev