I'd like to either use su or sudo -u to switch users to the subuid created by LXC to run a container as unprivileged.

I've tried doing as this post instructed, but I get the following:

[user@laptop user]# sudo -u \#100000 id
sudo: unknown user #100000

If It's somehow helpful:

• I'm using Arch Linux
• I'm using LXD to manage to container(s)

Does anyone know if there is a way to do this, even if via another command or method?

I'd like to either use su or sudo -u to switch users to the subuid created by LXC to run a container as unprivileged.

Note:

• There is no username assigned to the UIDs in which containers are run.
• Due to the above, I need to be able to switch purely by UID.

I've tried doing as this post instructed, but I get the following:

[user@laptop user]# sudo -u \#100000 id
sudo: unknown user #100000

If It's somehow helpful:

• I'm using Arch Linux
• I'm using LXD to manage to container(s)

Does anyone know if there is a way to do this, even if via another command or method?