Installation

To install LXD use snap

	$ snap install lxd

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Configuration

To use LXD you need to have an user in the lxd group

    	# usermod -aG lxd username

To configure LXD run as root

	# lxd init

Note that containers are stored in /var/lib/lxd by default

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Basic commands

Listing images

To list all the available images, use

	$ lxc image list images:

Should we want to list all the Debian images available, we shall use

	$ lxc image list images: debian

Creating a container

Creating an LXD container is really easy: we just use the alias that we get from the previous command, and type

	$ lxc launch images:debian/10 grus

Note that grus is the machine hostname

Configuring a container

Limiting CPU usage

You can limit container's CPU usage by, for example, the number of cores or CPU percentage

Limit CPU by number of cores

	$ lxc config set grus limits.cpu 2

Limit CPU by percentage

	$ lxc config set grus limits.cpu.allowance 20%

Limiting RAM usage

	$ lxc config set grus limits.memory 4096MB

Note that you can also specify the RAM usage in kB/GB/TB

Launching the container

After you created the container, you can access it with a shell using

	$ lxc exec grus -- /bin/bash

Note that /bin/bash can be replaced with anything you want (zsh, csh, fish, etc.)

You can even just run a single command, by typing

	$ lxc exec grus -- apt-get update

Note that we use apt-get update because in the previous commands we used a Debian distro

Moving a file

You can retrieve a file from the container by typing

	$ lxc file pull grus/etc/hosts .

This will copy the file in /etc/hosts from the container grus and place it in the current host directory

To push a file into the container, you can do

	$ lxd file push hosts grus/etc/

This will copy the file hosts to the folder /etc/ of the grus container

Shutting down and removing the container

To shut down the container you can do

	$ lxc stop grus

And to delete it use

	$ lxc delete grus