In the setup of Traefik I ran into an issue of “This page isn’t redirecting properly” or “Too many redirects”. There were no errors in either the Traefik or Authentik logs. The issue was a Cloudflare setting. By default the SSL mode is set on “flexible” and should be set to “full”.

• Log into your Cloudflare Dashboard
• Select the domain
• Go to SSL/TLS -> Overview
• Check Current encryption mode. This should be Full.

Source

Here’s how to install sudo:

1. Become root: You’ll need root privileges to install software. Use the su command to switch to the root user:

su -

Enter the root password when prompted.

2. Install sudo: Once you’re logged in as root, use the apt package manager to install sudo:

apt update 
apt install sudo

3. Add user to sudo group (again): After installing sudo, repeat the command to add your user to the sudo group (since the previous attempt likely failed):

usermod -aG sudo <username> 

Log out and back in: To ensure the changes take effect, log out of your current user session and log back in.