On Fri, 21 Mar 2025 at 22:10, Patrick O'Callaghan <pocallag...@gmail.com> wrote:
> On Fri, 2025-03-21 at 14:18 -0700, Samuel Sieb wrote: > > Maybe if there's no admin user. By default, root doesn't even have a > > password. > > What? Every Linux (and UNIX) system I've ever used has had a root > password, including Fedora. In fact, Anaconda asks you to set one up at > installation. Or did you mean something else? It's pretty common for baked cloud images and VMs to be provisioned with no explicit root password set. Just a standard shared or break-glass user (ec2user/admin/ubuntu/whatever) with one or more pubkeys dropped into the common user's authorized_keys via UserData/cloud-init, and a corresponding sudo config stub. The root user exists but has no password set (nb: not an empty/blank password, but a 'locked' account in terms of direct login, so root can only be assumed via sudo or something like an SSM agent.) e.g. [wmcdonald@fedora ~ ]$ ssh i-085545b2b626c7e1f admin@ip-10-0-1-63:~$ grep root /etc/passwd root:x:0:0:root:/root:/bin/bash admin@ip-10-0-1-63:~$ sudo grep root /etc/shadow root:*:19643:0:99999:7:::
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