[SATLUG] Runlevel Switching

[tom weeks]

On Wednesday 03 January 2007 18:57, Bruce Dubbs wrote:
> HickBilly wrote:
> >> To add to what Jeremy said, I always used 'telinit', which upon
> >> researching it just now is apparently very similar to 'init'.  So,
> >>
> >> prompt> telinit 3


On most GNU/Linux distros.. it's just a symlink to init:
# ls -la /sbin/telinit
lrwxrwxrwx 1 root root 4 Nov 21 23:16 /sbin/telinit -> init

telinit is a remnant of yesteryear.. 

> 1.  You have to be root.  su -
> 2.  telinit is in /sbin which may not be in your path.  Try /sbin/telinit 3

Again... in most distros you still must be root:
$ /sbin/init 5
init: must be superuser.

or some PAM configs will allow for this if you do it from a virtual terminal 
(CTRL-ALT-F1 as Kelly previously pointed out).  If your distro won't allow 
non root access to this command, then you may be able to do some PAM hacking 
to fix this:
	cp -a /etc/pam.d/poweroff /etc/pam.d/init

hmm.. not quite that simple.. I ran an strace on it and it looks like you 
would need to recompile init:
...
munmap(0x2aaaaaaac000, 4096)            = 0
umask(022)                              = 022
geteuid()                               = 500
write(2, "init: must be superuser.\n", 25init: must be superuser.
) = 25
exit_group(1) 

sorry..

Kelly?  Any other ideas?

I would set up an alias for init to call "sudo /sbin/init" and then map that 
in the sodoers file..  that should work.

Tweeks