Dimas Maulana

You want to run Docker commands to request a wildcard SSL certificate from Let’s Encrypt using Certbot and to create or renew a certificate for a specific domain. Here’s a breakdown of the commands and what they do:

Requesting a Wildcard Certificate with Certbot

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docker run -it --rm --name certbot -v "/root/docker-composes/server/apache/letsencrypt:/etc/letsencrypt" -v "/var/lib/letsencrypt:/var/lib/letsencrypt" -v "/var/www/html:/var/www/html" certbot/certbot --manual --preferred-challenges dns certonly --server https://acme-v02.api.letsencrypt.org/directory

• docker run: This command starts a new Docker container.
• -it: This flag enables an interactive terminal session.
• --rm: This flag removes the container when it exits.
• --name certbot: Specifies the name of the container as “certbot.”
• -v: This flag mounts volumes from the host to the container. You are mounting the following directories:
  • "/root/docker-composes/server/apache/letsencrypt" to "/etc/letsencrypt" inside the container.
  • "/var/lib/letsencrypt" to "/var/lib/letsencrypt" inside the container.
  • "/var/www/html" to "/var/www/html" inside the container.
• certbot/certbot: Specifies the Docker image to use, which is the Certbot image.
• --manual: Indicates that you want to perform manual DNS challenges to prove domain ownership.
• --preferred-challenges dns: Specifies that you prefer DNS challenges for domain verification.
• certonly: Instructs Certbot to obtain certificates without installing them.
• --server https://acme-v02.api.letsencrypt.org/directory: Sets the Let’s Encrypt ACME server’s URL for certificate issuance.

Creating/Renewing a Certonly Certificate

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certbot certonly --webroot -w /var/www/html/ -d example.com

• certbot certonly: This command tells Certbot to obtain a certificate without installing it.
• --webroot: Specifies the webroot plugin for authentication and authorization.
• -w /var/www/html/: Specifies the webroot path where Certbot should place challenge files.
• -d example.com: Specifies the domain (example.com in this case) for which you want to obtain or renew the certificate.

These commands allow you to request a wildcard SSL certificate and create or renew a standard SSL certificate using Certbot in a Docker container. Make sure to replace “example.com” with your actual domain name when running the second command.

When encountering Cloudflare Error 522 or ERR_NETWORK while using the internet, one possible cause could be the configuration of an Asus router with the Firewall DDOS feature enabled. This article aims to shed light on this issue and provide a solution for resolving it. However, it’s important to note that disabling the DDOS feature on the router may increase the risk of potential DDOS attacks from external sources.

Understanding Cloudflare Error 522 or ERR_NETWORK

Cloudflare Error 522 or ERR_NETWORK is an HTTP error code that occurs when a TCP connection between the origin server and Cloudflare is unable to establish within a specific timeframe. This error often manifests as a prolonged loading time or complete unavailability of a website.

Tmux is a popular terminal multiplexer that allows users to manage multiple terminal sessions within a single window. However, some users may encounter an issue where Tmux generates random characters when clicking or scrolling within the terminal. This can be frustrating and disrupt the user’s workflow. In this article, we will explore a solution to fix this problem.

Solution

To resolve the issue of Tmux generating random characters on click or scroll, you can follow the steps outlined below:

When working with images, especially those captured by digital cameras or smartphones, you might encounter a lot of metadata embedded within the image files. This metadata often includes valuable information such as camera settings, date and time of capture, and even geolocation. This information is stored in a format known as Exchangeable Image File Format (EXIF). While EXIF data can be useful, there are situations where you might want to remove it for privacy, security, or optimization reasons.

We have provided a set of command-line instructions for managing backup files. These commands are designed to remove older backup files based on certain criteria. Let me break down each of the commands for you:

1. Removing Old Backup Files Using ls, tail, and xargs:

   1	ls -t1 | tail -n +11 | xargs -d '\n' rm

   This command is used to list files in a directory by their modification time in descending order (-t1). Then, it uses tail to exclude the top 10 files (keeping the 11th and onwards), and finally, it uses xargs to remove these older files.

In this article, we’ll explore how to update the metadata of video files (in this case, MP4 files) based on their modified date using the powerful Exiftool command-line utility. Metadata can include various information about the video, such as creation date, author, and more. Sometimes, it’s necessary to adjust or correct this metadata. Here, we’ll focus on modifying the date-related metadata using Exiftool.

Prerequisites

Before you begin, make sure you have Exiftool installed on your system. You can download it from the official website: Exiftool