Crawling with PHP8 and Ubuntu 20.04 - kylessukaichang/kylessukaichang.github.io GitHub Wiki

• apt-get install software-properties-common

  • E: Unable to locate package software-properties-common

    • apt-get update
• add-apt-repository ppa:ondrej/php

• apt update
• apt upgrade
• apt install php8.0 libapache2-mod-php8.0

• apt install apache2

  • apache2 set to manually installed.

  • E: Unable to locate package apache2

    • How to install apache2 in Ubuntu
      • apt-get update
      • apt-get upgrade
      • apt-get install apache2

• Differences between SysVinit, Upstart and Systemd
• systemctl enable apache2

  • Synchronizing state of apache2.service with SysV service script with /lib/systemd/systemd-sysv-install.
    Executing: /lib/systemd/systemd-sysv-install enable apache2

    • systemctl start apache2

      • System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down

        • Ubuntu – systemctl failed to connect to bus – docker ubuntu:16.04 container

        • The problem now is that your init process PID 1 is /bin/bash, not systemd. Confirm with ps aux.

  • bash: systemctl: command not found

    • Fix: Systemctl Command not Found
      • outdated versions of Linux operating systems
        • not support Systemd
        • using
        • SysV init
        • Upstart
        • service apache2 start

        • AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message

        • echo "ServerName localhost" >> /etc/apache2/apache2.conf
        • Docker PHP-APACHE container set the ServerName directive globally
        • FROM php:7.0-apache
        • COPY . /var/www/html/
        • EXPOSE 80
        • RUN echo "ServerName localhost" >> /etc/apache2/apache2.conf
        • CMD ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]
        • Dockerfile reference

On Ubuntu systems, Nginx server block configuration files are located in /etc/nginx/sites-available directory.

• server {
•  # . . . other code
•  location ~ .php$ {
•   include snippets/fastcgi-php.conf;
•   fastcgi_pass unix:/var/run/php/php8.0-fpm.sock;
•  }
• }

They can be enabled by creating symbolic links to the /etc/nginx/sites-enabled directory, which Nginx read during the startup.

• Package php8.0-json is a virtual package provided by:

  • php8.0-phpdbg 8.0.9-1+ubuntu20.04.1+deb.sury.org+1

  • php8.0-fpm 8.0.9-1+ubuntu20.04.1+deb.sury.org+1

  • php8.0-cli 8.0.9-1+ubuntu20.04.1+deb.sury.org+1

  • php8.0-cgi 8.0.9-1+ubuntu20.04.1+deb.sury.org+1

  • libphp8.0-embed 8.0.9-1+ubuntu20.04.1+deb.sury.org+1

  • libapache2-mod-php8.0 8.0.9-1+ubuntu20.04.1+deb.sury.org+1

• You should explicitly select one to install.

• E: Package 'php8.0-json' has no installation candidate

• curl -sS https://getcomposer.org/installer | php
  • php ~/composer.phar require guzzlehttp/guzzle:^6.2
  • php ~/composer.phar require symfony/dom-crawler:^4.3
  • php ~/composer.phar require symfony/css-selector:^4.3

• Docker CE/EE 18.06+
  • Docker Community Edition
  • Docker Enterprise Edition
• Docker Compose 1.21+.
  • Compose is a tool for defining and running multi-container Docker applications.
  • The Ubuntu snap package is not supported
    • Linux Mint決定不支援Ubuntu Snap
    • CANONICAL
      • Snapcraft store
    • “snap install docker-compose” Code Answer’s

• Ubuntu 16.04+