About these docs

These docs are written and maintained by Christophe TREMBLAY-GUILLOUX, Linux systems engineer at Libre Master. They bring together, in one place, the guides handed to customers and the technical notes used day to day to administer their servers.

They are public: no account, no login. If a page helps you even though you are not a customer, so much the better.

What you will find here

• Managed services: running and maintaining servers and websites (Virtualmin, system, cloud, databases).
• Linux workstation: notes for day to day work on a Linux machine.
• Dolibarr: getting started with the online ERP/CRM.
• WordPress: managing and securing your site.

The content follows the real needs of ongoing projects: it grows with each piece of work rather than aiming for exhaustiveness. The date shown at the top of each page is its last update.

Who they are for

Two audiences, two kinds of pages:

• Guides are aimed at the user of a service. They assume a browser and a bit of curiosity, not systems expertise.
• Notes marked 🔧 are aimed at administrators. They contain commands to run as root on a server, and a callout says so at the top of the page.

If you are a Libre Master customer, the guides are all you need. The notes stay visible as a matter of transparency about how your servers are administered.

How to read the examples

The header of a command block shows the language followed by the shell prompt, and on the right a reminder of which account to run it with:

• $ and "run as a regular user": the command runs with an ordinary user account, without root privileges.
• # in red and "run as root": this one requires root privileges, so it requires knowing what it does.
• Blocks without a header show terminal output: what the command prints, there is nothing to copy.

A command to run with your own account:

bash

du -sh ~/public_html

The same thing on the administrator side, with root privileges:

bash

systemctl restart nginx

Values to replace with your own appear in capitals or between angle brackets, for example PASSWORD or <TEMPLATE>.

Finding information

The search box at the top covers the whole site. The sidebar has two levels: the Guides and services selector picks the section, and the menu below it lists the pages of the current section.

A question, a mistake, a missing guide

A command that fails, a step that has changed, a topic you would like covered: write to me. Feedback directly shapes which pages come next.

Need help with your own infrastructure? That is what Libre Master does: see the services.