4-not_found_page_404

#!/usr/bin/env bash
# Install and configure nginx for redirection

function install_and_configure_nginx(){
    sudo apt-get update
    sudo apt-get -y install nginx
    sudo chown -R "$USER":"$USER" /var/www/html/
    echo 'Hello World!' > /var/www/html/index.html
    sudo chown -R "$USER":"$USER" /etc/nginx/sites-available/
    redirect="\\\trewrite ^/redirect_me https://www.youtube.com/watch?v=QH2-TGUlwu4 permanent;"
    sudo sed -i "26i $redirect" /etc/nginx/sites-available/default

    echo "Ceci n'est pas une page" | sudo tee /usr/share/nginx/html/404.html
    line="\\\terror_page 404 /404.html;\n\tlocation = /404.html {\n\t\troot /usr/share/nginx/html;\n\t\tinternal;\n\t}"
    sudo sed -i "27i $line" /etc/nginx/sites-available/default
    if [[ $(pgrep nginx) ]]; then
        sudo nginx -s reload
    else
        sudo service nginx start
    fi
}
install_and_configure_nginx;