How to move docker data directory to another location on Ubuntu

Docker is a popular container management platform that can dramatically speed up your development workflow. It is available as a package on major Linux distributions, including Ubuntu.

The standard data directory used for docker is /var/lib/docker, and since this directory will store all your images, volumes, etc. it can become quite large in a relative small amount of time.

If you want to move the docker data directory on another location you can follow the following simple steps.

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A simple Python email gateway

Say you have a Django web application that you want to integrate with emails to make it possibile to send data and files to your web application over SMTP.

The good news is that Python has a simple SMTP daemon in the standard library, together with modules to parse emails. Let’s see how to create a simple email gateway on top of these tools.

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How to deploy a Django project in 15 minutes with Ansible

In this tutorial I will explain how to deploy a Django project in 15 minutes with Ansible. I will assume that you are a Django developer and you have built and tested a project locally. It’s time to deploy the project on a public server to let users access your awesome application.

So you need a VPS with an SSH access, then you will access the server, install and configure all necessary software (web server, application server, database server), create a database user, configure Django to use it, copy your Django project on the server, migrate the database, collect static files, trial and error, fix, trial and error, …

All this boring stuff will take some good hours that you should definitely spend in a more profitable way, don’t you think? The good news is that you can automate almost all the work needed to go from a vanilla VPS to a fully deployed server hosting your Django project.

Follow this tutorial and I’ll show you how to leverage the power of Ansible to automate all the needed steps in 15 minutes. Are you ready? Check the time on your clock and follow me!

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Configure SFTP access to your Ubuntu server through SSH

Sometimes you have to give your users a way to manage files on your server. A typical scenario is a web server where your users manage their websites by themselves.

The classical approach in this scenario was to use FTP to give file management capabilities to your users, but it has many drawbacks:

  1. You have to provision and maintain a new service on your server;
  2. FTP is an annoying protocol from a firewall configuration point of view;
  3. FTP is not encrypted by default, and you have to put some effort to configure an FTP server which is protected from sniffing.

If you are a lazy sysadmin like me you’ll prefer to use a service you already have, which is encrypted by default and do not require a special firewall configuration other than the port 22 you are already using.

ssh to the rescue!

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