rbeucher

Recovering deleted files in Ubuntu with ext4 filesystem

Recently, I deleted some files by mistake in a Ubuntu machine with an ext4 fs. These notes document the steps I took to get them back.

Important

• this procedure assumes that the partition that contained the deleted files is different from the root partition, as that was the scenario with which I had to deal (deleted files were in my home dir). The procedure needs that the partition that contained the files is unmounted, so if the deleted files were in the root partition, the process would be a bit different (e.g. storing the fs journal in a USB stick, using a live CD/USB to boot and issue the commands, etc.)
• if something is not clear, you need more information, etc. check the sources below

With that out the way, let's begin.

rbeucher

Production Web Server Setup and Deployment Guide

This is a detailed runbook for setting up a production server on an Ubuntu 16.04 cloud VPS for automated deployment of static web content to be served by an NGINX web server and Node.js web application behind an NGINX reverse-proxy, both with SSL/TLS (https) support.

The steps are as follows:

1. Create a VPS instance
2. Set Up Server Security
   1. Update Server Software
3. Create a non-root user

rbeucher

Our goal here is to have one USB stick to rule them all. Objectives:

• We want a full system - not a live CD
• We want to boot this system on a Macbook Pro (requires UEFI)
• We want to boot this system on a Acer C720 Chromebook (requires Legacy BIOS support)
• We want the system "functional"

The last bullet is subject to interpretation, but I'm defining functional as:

• X Windows works (with LXDE)

rbeucher

############# Markdown parser in Jupyter notebooks ##################

<div class="alert alert-block alert-info"> <b>NOTE</b> Use blue boxes for Tips and notes. </div>

<div class="alert alert-block alert-success"> Use green boxes sparingly, and only for some specific purpose that the other boxes can't cover. For example, if you have a lot of related content to link to, maybe you decide to use green boxes for related links from each section of a notebook.

rbeucher