主要原理是利用xvfb提供的显卡帧缓冲区，让浏览器以为有桌面
Install xvfb in ubuntu:
sudo apt install xvfb
cat > /etc/init.d/xvfb <
XVFB=/usr/bin/Xvfb
XVFBARGS=":99 -screen 0 1024x768x24 -fbdir /var/run -ac"
PIDFILE=/var/run/xvfb.pid
case "$1" in
start)
echo -n "Starting virtual X frame buffer: Xvfb"
start-stop-daemon --start --quiet --pidfile $PIDFILE --make-pidfile --background --exec $XVFB -- $XVFBARGS
echo "."
;;
stop)
echo -n "Stopping virtual X frame buffer: Xvfb"
start-stop-daemon --stop --quiet --pidfile $PIDFILE
echo "."
;;
restart)
$0 stop
$0 start
;;
*)
echo "Usage: /etc/init.d/xvfb {start|stop|restart}"
exit 1
esac
exit 0
EOF
chmod +x /etc/init.d/xvfb
export DISPLAY=:99.0
/etc/init.d/xvfb start
1.2. Install chrome in ubuntu:
sudo apt-get install libxss1 libappindicator1 libindicator7
sudo apt-get install -f
wget /linux/direct/google-chrome-stable_current_amd64.deb
sudo dpkg -i google-chrome*.deb
sudo ln -s /usr/bin/google-chrome /usr/bin/chrome
1.3. Install chromedriver in ubuntu:
wget http://chromedriver./2.25/chromedriver_linux64.zip
unzip chromedriver_linux64.zip
sudo mv chromedriver /usr/bin/
1.4. Install firefox in ubuntu:
sudo apt install firefox
1.5. Install geckodriver for firefox in ubuntu:
wget /mozilla/geckodriver/releases/download/v0.11.1/geckodriver-v0.11.1-linux64.tar.gz
tar zxf geckodriver-v0.11.1-linux64.tar.gz
sudo mv geckodriver /usr/bin/
