[CALUG] Difference between telinit and init

[Gregory Haase]

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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