How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv

Now create a virtual environment

virtualenv venv

Active your virtual environment:

source venv/bin/activate

install pip packages

`pip install -r requirements.txt

install chromedriver

latest version from https://sites.google.com/a/chromium.org/chromedriver/downloads

sudo apt-get update
sudo apt-get install -y unzip xvfb libxi6 libgconf-2-4
sudo apt-get install default-jdk 

wget -N https://chromedriver.storage.googleapis.com/81.0.4044.69/chromedriver_linux64.zip
unzip chromedriver_linux64.zip
chmod +x chromedriver

sudo mv -f chromedriver /usr/local/share/chromedriver
sudo ln -s /usr/local/share/chromedriver /usr/local/bin/chromedriver
sudo ln -s /usr/local/share/chromedriver /usr/bin/chromedriver


wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
echo 'deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main' | sudo tee /etc/apt/sources.list.d/google-chrome.list
sudo apt-get update 
sudo apt-get install google-chrome-stable

Using fish shell:

source venv/bin/activate.fish

To deactivate:

deactivate

Create virtualenv using Python3

virtualenv -p python3 myenv

Instead of using virtualenv you can use this command in Python3

python3 -m venv myenv

Add python module to path

export PYTHONPATH="${PYTHONPATH}:inkedNewsCrawler" chmod +x crawler.sh

register service

sudo cp crawler.service /etc/systemd/system/crawler.service
sudo chmod 664 /etc/systemd/system/crawler.service

sudo systemctl daemon-reload
sudo systemctl start crawler.service
sudo systemctl status crawler.service
sudo systemctl enable crawler.service