Selenium

install chrome

sudo apt-get update 
sudo apt-get install wget

need to set same version of google-chrome and chromedriver

wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
wget https://dl.google.com/linux/chrome/deb/pool/main/g/google-chrome-stable/google-chrome-stable_96.0.4664.45-1_amd64.deb
sudo dpkg -i google-chrome-stable_96.0.4664.45-1_amd64.deb
sudo apt-get install -f 
google-chrome --version

sudo apt install ./google-chrome-stable_current_amd64.deb

#### download link
https://chromedriver.com/download
wget https://chromedriver.storage.googleapis.com/109.0.5414.74/chromedriver_linux64.zip

unzip chromedriver_linux64.zip
sudo mv chromedriver /usr/bin/chromedriver
sudo chmod +x /usr/bin/chromedriver

install python3

sudo apt-get install python3
export PATH=/usr/local/bin/python3:$PATH 
sudo apt-get install pip

install selenium

sudo pip install xlrd
sudo apt-get install xvfb
sudo pip install pyvirtualdisplay
sudo pip install selenium

selenium

from selenium import webdriver
from pyvirtualdisplay import Display // for cli environment

display = Display(visible=0, size=(1920, 1080))
display.start()
webdriver.Chrome(executable_path='/path/to/chromedriver', options=chrome_options)

chrome_options.add_argument("--headless")
chrome_options.add_argument("--no-sandbox")
chrome_options_add_argument("--disable-dev-shm-usage")
driver = webdriver.Chrome(options=chrome_options)

crontab

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char* argv){

        printf("argc %d", argc);

        system("crontab -l > temp.txt");

        // 1분. 2시.  3일.  4월.   5요일

        system("echo '2 8 * * * /usr/bin/python3 /home/usr/documents/hello.py");

        system("crontab temp.txt");

        system("rm temp.txt");

        printf("new crontab setted");

        return 0;
}

crontab command

crontab -l //search exist crontabs
crontab -r //remove all exist crontabs

no-display example