[CALUG] Difference between telinit and init

[Eric K. Dickinson]

Is there a difference?

  1 lrwxrwxrwx  1 root root      4 2006-01-24 00:58 telinit -> init

eric

Gregory Haase wrote:
> init -t appears to work, although that would be an "undocumented
> feature" as far as the man page is concerned.
> 
> I don't understand why your second answer is "better yet" - It looks
> like a CLI hack for solving a problem that already has a viable solution.
> 
> The real true difference between init and telinit is that init always
> carries a PID of 1 whereas telinit will acquire a separate PID as any
> other process in the system. Although I have no idea why this would
> actually matter in the grand scheme of things.
> 
> -G
> 
> James Ewing Cottrell 3rd wrote:
>> And what does "init -t 300 3" do? Better yet, what does "(sleep 300;
>> exec init 3)&" do?
>>
>> JIM
>>
>> Gregory Haase wrote:
>>> If you look at the man page for init or telinit (actually the same page
>>> on my machine), you will see that other than including a runlevel after
>>> the command, the two have different switches - specifically, telinit
>>> includes the -t switch which allows you to add a time component to the
>>> command.
>>>
>>> Running init 3 will instantly cause the init process change the runlevel
>>>
>>> Running telinit -t 300 3 will cause the init process to change the
>>> runlevel in 5 minutes.
>>>
>>> -Greg
>>>
>>> James Ewing Cottrell 3rd wrote:
>>>
>>>> Which brings up the question: Why TF does "telinit" exist in the
>>>> first place? What's wrong with simply typing "init 1"? Nothing!
>>>>
>>>> JIM
>>>>
>>>> Gary wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I usually accomplish this with the "telinit" command:  "telinit 1"
>>>>>
>>>>> This drops you into runlevel 1, which is single-user mode. 
>>>>> Networking isn't typically enabled in runlevel 1, but you
>>>>> probably don't need it if the NVIDIA driver resides on the
>>>>> local machine.  Depending on the Linux distro, you might
>>>>> also try "telinit 3", which is multi-user command console
>>>>> mode in RedHat and Fedora Core distros.
>>>>> Good Luck,
>>>>>  Gary.
>>>>>
>>>>> Edward D. Browne wrote:
>>>>>
>>>>>
>>>>>
>>>>>> Hmmm, guess I haven't needed to do this since quite a few
>>>>>> releases ago.  I'm trying to upgrade my graphics driver
>>>>>> (to NVIDIA-Linux-x86-1.0-8762-pkg1.run), which means
>>>>>> I have to get out of X.  As I recall, there was always a menu
>>>>>> option at the login screen to log in without X running, but now
>>>>>> with RH AS3, I see no such option.  Killing X, and everything
>>>>>> that looks connected to X, only results in it automatically
>>>>>> restarting.   init 3 or 4 or 5 or 6 (it doesn't seem to matter)
>>>>>> just causes the machine to reboot all the way back to run
>>>>>> level 6.  What obvious solution am I missing?
>>>>>>
>>>>>> TIA - Ed
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>>>>>>
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