Today I realised that I forgot to document my Portainer password. If you don't know what Portainer is and what it is used for, you should continue here first -> Link
Thank goodness the resetting process is not too time-consuming.
First, you have to determine the container ID.
# List all docker containers docker ps
Now you can stop the container.
# Stopping the portainer container... docker stop <id-portainer-container>
Portainer now offers a resetting tool that can be fetched via the official Docker Hub. Below you will find a command to reset the password right away.
# Resetting the passwort docker run --rm -v portainer_data:/data portainer/helper-reset-password
Of course, the last thing to do is to start the container again.
# Starting the portainer container docker start <id-portainer-container>
After you have successfully logged in, you should change your password again.