2018-12-22 16:52:16 +00:00
|
|
|
---
|
2018-01-01 19:04:05 +00:00
|
|
|
permalink: "/{{ year }}/{{ month }}/{{ day }}/changing-the-root-password-in-recent-smartos"
|
2014-05-12 20:11:14 +00:00
|
|
|
title: Changing the root password in recent SmartOS
|
2018-01-01 19:04:05 +00:00
|
|
|
published_date: "2014-05-12 22:02:00 +0200"
|
|
|
|
|
layout: post.liquid
|
|
|
|
|
data:
|
|
|
|
|
route: blog
|
2014-05-12 20:11:14 +00:00
|
|
|
---
|
|
|
|
|
Back in 2012 Jonathan Perkin wrote a little bit about [SmartOS and the global zone][perkin],
|
|
|
|
|
why and what in SmartOS is mounted read-only.
|
|
|
|
|
|
|
|
|
|
Back then `/etc/shadow`, the file containing the root password, was mounted with write permissions.
|
|
|
|
|
It is not anymore:
|
|
|
|
|
|
|
|
|
|
~~~shell
|
|
|
|
|
# ls -l /etc/shadow
|
|
|
|
|
-r-------- 1 root root 560 May 12 19:51 /etc/shadow
|
|
|
|
|
~~~
|
|
|
|
|
|
|
|
|
|
And thus `passwd` will fail when trying to change the password.
|
|
|
|
|
But it's easy to circumvent this. It's actually a lofs-mount as can be seen:
|
|
|
|
|
|
|
|
|
|
~~~shell
|
|
|
|
|
# mount | grep shadow
|
|
|
|
|
/etc/shadow on /usbkey/shadow read/write/setuid/devices/dev=1690008 on Mon May 12 20:05:36 2014
|
|
|
|
|
~~~
|
|
|
|
|
|
|
|
|
|
So to change your password use the following:
|
|
|
|
|
|
|
|
|
|
~~~shell
|
|
|
|
|
/usr/lib/cryptpass your-fancy-password
|
|
|
|
|
# replace crypt string in /usbkey/shadow
|
|
|
|
|
umount /etc/shadow
|
|
|
|
|
mount -F lofs /usbkey/shadow /etc/shadow
|
|
|
|
|
~~~
|
|
|
|
|
|
|
|
|
|
1. will create the crypt string of your password. Make sure to remove it from your bash history afterwards
|
|
|
|
|
2. place this string in `/usbkey/shadow` (it's the long string between the first two `:`)
|
|
|
|
|
3. unmount the file in place
|
|
|
|
|
4. remount the right file back in place
|
|
|
|
|
|
|
|
|
|
And that's it, the new root password is set.
|
|
|
|
|
|
|
|
|
|
[perkin]: http://www.perkin.org.uk/posts/smartos-and-the-global-zone.html
|
