Arch Linux

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Can't shutdown as user

Hi,

I just followed the Wiki-Entry on how to make users able to shutdown/reboot the system, but I get the following error:

user /home/user $  sudo halt
sudo: sorry, you are not allowed to preserve the environment

My sudoers file:

Defaults:user timestamp_timeout=0
Defaults insults

root    ALL=(ALL) ALL
user    ALL=(ALL) ALL

user localhost=NOPASSWD: /sbin/halt
user localhost=NOPASSWD: /sbin/reboot

On my old installation I had this working already, I really appreciate all help.

---

Who we are is but a stepping stone to what we can become.

heimdal

Member

Registered: 2009-06-25

Posts: 27

Re: Can't shutdown as user

Are you part of the Power group?

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

Now I am ;-) but it still won't work.

---

Who we are is but a stepping stone to what we can become.

bernarcher

Forum Fellow

From: Germany

Registered: 2009-02-17

Posts: 2,281

Re: Can't shutdown as user

I have

bp    ALL=NOPASSWD: /sbin/reboot
bp    ALL=NOPASSWD: /sbin/halt

Might be worth a try.

---

To know or not to know ...
... the questions remain forever.

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

Still gives me

sudo: sorry, you are not allowed to preserve the environment

---

Who we are is but a stepping stone to what we can become.

heimdal

Member

Registered: 2009-06-25

Posts: 27

Re: Can't shutdown as user

Is root part of Power? since you are calling SUPER USER DO?

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

Yes root is in the power group.

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Who we are is but a stepping stone to what we can become.

toad

Member

From: if only I knew

Registered: 2008-12-22

Posts: 1,775

Website

Re: Can't shutdown as user

I take it you logged out and in again after having made changes to /etc/group?

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t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

I did a logout and login after every change.

---

Who we are is but a stepping stone to what we can become.

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: Can't shutdown as user

This has worked fine for me in etc/sudoers file for ages :

%powerusers ALL = (root) NOPASSWD: /sbin/poweroff
%powerusers ALL = (root) NOPASSWD: /sbin/reboot

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

This has worked fine for me in etc/sudoers file for ages :

%powerusers ALL = (root) NOPASSWD: /sbin/poweroff
%powerusers ALL = (root) NOPASSWD: /sbin/reboot

Now when I type

sudo reboot

bash prompts me for the password.

---

Who we are is but a stepping stone to what we can become.

loafer

Member

From: the pub

Registered: 2009-04-14

Posts: 1,772

Re: Can't shutdown as user

Type the command "sudo -l" and it will show you what you are allowed to do.  There may be another entry overriding it.  Try adding the lines as the last entry in sudoers if they are not there already.

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All men have stood for freedom...
For freedom is the man that will turn the world upside down.
Gerrard Winstanley.

arunix

Member

From: /home/kurali

Registered: 2009-04-08

Posts: 93

Re: Can't shutdown as user

what about this?

chmod +x /usr/sbin

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t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

Hmm when I type

sudo -l

it just gives me the usage description but the command schould work without parameters schouldn't it?

---

Who we are is but a stepping stone to what we can become.

a1ex

Member

From: Germany

Registered: 2007-02-16

Posts: 91

Re: Can't shutdown as user

%users ALL= NOPASSWD: /usr/sbin/pm-suspend,/usr/bin/netcfg2

from /etc/sudoers works fine here. Just place halt and reboot there.

Or you could chmod +s /sbin/halt and reboot, which allows to execute it as user.

Last edited by a1ex (2009-08-03 14:38:00)

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: Can't shutdown as user

This has worked fine for me in etc/sudoers file for ages :

%powerusers ALL = (root) NOPASSWD: /sbin/poweroff
%powerusers ALL = (root) NOPASSWD: /sbin/reboot

Now when I type

sudo reboot

bash prompts me for the password.

My mistake, those 2 lines in /etc/sudoers  give all users that are member of the group powerusers the ability to use those 2 commands
WITHOUT sudo or password .

In other words :
When powerusers enter "reboot"  or "shutdown" , it will be executed with root-rights .

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

Crows

Member

From: Wales

Registered: 2008-09-05

Posts: 92

Re: Can't shutdown as user

2 Suggestions if you haven't got this fixed yet:

A) Are you sure you don't have any PolicyKit/Hal stuff running that could be blocking this?

B) Try sudo shutdown -h now instead?

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

A) Are you sure you don't have any PolicyKit/Hal stuff running that could be blocking this?

I don't know, I didn't change any related configs. Is it blocked by default from anything?

---

Who we are is but a stepping stone to what we can become.

Crows

Member

From: Wales

Registered: 2008-09-05

Posts: 92

Re: Can't shutdown as user

This has worked fine for me in etc/sudoers file for ages :

%powerusers ALL = (root) NOPASSWD: /sbin/poweroff
%powerusers ALL = (root) NOPASSWD: /sbin/reboot

Now when I type

sudo reboot

bash prompts me for the password.

Sorry if I'm insulting your intelligence t4k1t, but is you group named powerusers or power? If it's power then that should be %power on those lines.

It's usually the little mistakes that cause problems like this. I should know, I've made quite a few myself since coming to arch.

Is it blocked by default from anything?

No. I was thinking of the problems you can get into with HAL stopping WMs from shutting down. Shouldn't be the cause, but mentioned it just in case.

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

Sorry if I'm insulting your intelligence t4k1t, but is you group named powerusers or power? If it's power then that should be %power on those lines.

Bad enough I have to admit I overlooked that, but with power instead of powerusers it's still not working.

I still get

sudo: sorry, you are not allowed to preserve the environment

---

Who we are is but a stepping stone to what we can become.

bernarcher

Forum Fellow

From: Germany

Registered: 2009-02-17

Posts: 2,281

Re: Can't shutdown as user

I did some googeling for this error message and found this discussion. I had no time for thorough reading, however, but it might be worth a try.

---

To know or not to know ...
... the questions remain forever.

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

Hm thanks I read this, but it won't work either.

What really disturbes me is that

sudo -l

isn't working.
Or am I just unable to understand the manpage for sudo?

---

Who we are is but a stepping stone to what we can become.

Crows

Member

From: Wales

Registered: 2008-09-05

Posts: 92

Re: Can't shutdown as user

What do you mean by isn't working? No output at all?

t4k1t

Member

Registered: 2009-07-19

Posts: 123

Re: Can't shutdown as user

It gives me the description on how to use sudo -l as if I got the syntax wrong, but the command is only

sudo -l

or did I miss smth?

---

Who we are is but a stepping stone to what we can become.

Crows

Member

From: Wales

Registered: 2008-09-05

Posts: 92

Re: Can't shutdown as user

It should list the commands you can do as sudo. The only things I can think of are you're running it as root (may make a difference) or you're using a font that make a lower-case L look like a capital I.

My file is set as:

%wheel ALL=(ALL) ALL

%wheel ALL=NOPASSWD: /sbin/shutdown -h now

Of course, that's not too safe if you have a multi-user system. But I dont, so meh.