diff --git a/content/blog/2021-gandi-vps-any-os.md b/content/blog/2021-gandi-vps-any-os.md
new file mode 100644
index 0000000..79833e5
--- /dev/null
+++ b/content/blog/2021-gandi-vps-any-os.md
@@ -0,0 +1,116 @@
+---
+Title: How to install any distrib on a Gandi VPS
+Date: 2021-11-18 08:51:00
+Status: Draft
+Summary: I needed to install BBB, which requires Ubuntu 18.0.4, but they only had Ubuntu 20.0.4...
+---
+
+Currently Gandi VPS don't provide an image with Ubuntu Bionic, which
+is needed for example to install BBB. So I started an in-memory Ubuntu
+on top of an Ubuntu to install an Ubuntu...
+
+If you land here from the future, and want to do the same, double
+check, Gandy may have already implemented an object storage allowing
+you to use any distrib, making the setup of alternative distribs way
+easier.
+
+The same process could be used to install any Debian based distrib, or
+with some more modifications any other Linux distrib, don't hesitate
+to play around.
+
+> ⚠ WARNING ⚠
+> The probability you'll just brick your VPS once or twice before succeding is high.
+> Don't do this on a VPS you care.
+>
+> In case of failure, just drop the VPS and start fresh.
+
+OK, « en route » !!
+
+The first step is to start a small Ubuntu (or Debian or whatever) in
+memory, so we'll be able to destroy the real one, for this I used
+[takeover.sh](https://github.com/marcan/takeover.sh), so SSH to your
+VPS and:
+
+First get root:
+
+```bash
+$ sudo su -
+```
+
+Then we'll create a new root, in memory, for the temporary distrib:
+
+```bash
+# mkdir /takeover
+# mount -t tmpfs tmpfs /takeover -o size=2G  # Fully in RAM as we'll umount / later.
+# apt update; apt-get install debootstrap busybox git build-essential
+# debootstrap --variant=minbase bionic /takeover/ http://archive.ubuntu.com/ubuntu/  # Any OS would do, it's just a temporary one from which we'll install the real one.
+```
+
+We could already chroot in it, but we'll prepare the ground for
+[takeover.sh](https://github.com/marcan/takeover.sh):
+
+```bash
+# wget -O /takeover/busybox https://www.busybox.net/downloads/binaries/1.26.2-defconfig-multiarch/busybox-x86_64
+# chmod a+x /takeover/busybox
+# git clone https://github.com/marcan/takeover.sh /tmp/takeover.sh/
+# cp -a /tmp/takeover.sh/* /takeover/
+# cd /takeover
+# gcc -static fakeinit.c -o fakeinit
+# chroot /takeover /usr/bin/apt install openssh-server
+# mkdir /takeover/run/sshd
+# cp usr/bin/passwd bin/  # takover.sh need it here
+```
+
+
+OK everything is ready to "pivot" root filesystem:
+
+```bash
+# sh takeover.sh  # Here Come The Dragons.
+```
+
+If everything goes well, we can now ssh to the in-memory sshd (on port
+80), and kill all remaining things of the real underlying OS, umount
+everything, format it, and start fresh:
+
+```bash
+$ ssh -p80 root@your_host
+# pkill -9 -f systemd  # and all remaining process using kill -9 PID PID PID PID PID PID ... EXCEPT the SSH you're actually using!
+# mount | tac | grep old_root | cut -d' ' -f3 | xargs umount  # Umount old_root (may need to be ran multiple times)
+# mkfs.ext4 /dev/xvda1  # A clean filesystem for the new distrib
+# mount /dev/xvda1 /old_root/
+# echo nameserver 9.9.9.9 > /etc/resolv.conf  # NEIN! NEIN!! NEIN!!! NEIN!!!!
+# apt install debootstrap
+```
+
+OK we destroyed everything from the old distrib, let's choose a new one:
+
+```bash
+# debootstrap bionic /old_root/ http://archive.ubuntu.com/ubuntu/  # This is the OS and version you want to install, maybe it's not Ubuntu bionic!
+# mount -o bind /dev/ /old_root/dev/  # Prepare to chroot
+# mount -o bind /run/ /old_root/run/  # Prepare to chroot.
+# mount -o bind /sys/ /old_root/sys/  # Prepare to chroot..
+# mount -t proc none /old_root/proc/  # Prepare to chroot...
+# chroot /old_root/  # And we're back on disk!
+```
+
+Now we're back on disk, on the new distrib, we may have some
+configuration to do before rebooting like installing a kernel,
+changing root password, adding ssh keys, configuring grub, configuring
+network interfaces...
+
+```bash
+# echo nameserver 9.9.9.9 > /etc/resolv.conf  # Yes, again: we're not on the same root...
+# apt update
+# apt install linux-virtual openssh-server ifupdown
+# mkdir /root/.ssh/
+# wget https://mdk.fr/id_rsa.pub -O /root/.ssh/authorized_keys  # Or your own keys, your choice.
+# passwd  # Set a root password, useful to connect via the emergency console.
+# printf "%s\n%s\n 'auto eth0' 'iface eth0 inet dhcp' > /etc/network/interfaces  # Setup the network
+# # Setup /etc/fstab, if you want the UUID of the disk use `blkid`.
+# sync  # For good measure
+# reboot now
+```
+
+Now you can ssh on port 22 again, yes the fingerprint will have
+changed as we replaced the root filesystem we replaced /etc/ssh/key*,
+don't worry.