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Groups > comp.os.linux.misc > #4033

Re: How do you use the "at" command?

From Aragorn <stryder@telenet.be.invalid>
Newsgroups comp.os.linux.misc
Subject Re: How do you use the "at" command?
Followup-To comp.os.linux.misc
Date 2012-01-31 03:16 +0100
Organization A noiseless patient Strider
Message-ID <jg7it2$an1$1@dont-email.me> (permalink)
References (3 earlier) <P5WdnXHRScYehb7SnZ2dnUVZ_hCdnZ2d@posted.localnet> <jg05ao$d1b$1@dont-email.me> <pan.2012.01.28.10.27.21@thedarkdesign.free.fr.INVALID> <jg1ddq$cmg$1@dont-email.me> <4f2659fa$0$32272$426a74cc@news.free.fr>

Followups directed to: comp.os.linux.misc

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On Monday 30 January 2012 09:51, Loki Harfagr conveyed the following to 
comp.os.linux.misc...

> Sat, 28 Jan 2012 19:05:46 +0100, Aragorn did cat :
> 
>> On Saturday 28 January 2012 11:27, Loki Harfagr conveyed the
>> following to comp.os.linux.misc...
>> 
>>> Fri, 27 Jan 2012 22:41:37 -0800, Todd did cat :
>>> 
>>>> On 01/27/2012 01:34 PM, Robert Heller wrote:
>>>>> # Shutdown in 5 minutes and force a fsck on boot. sudo
>>>>> # /sbin/shutdown
>>>>> -F +5
>>>>>
>>>>> # Shutdown at 11pm and force a fsck on boot. sudo /sbin/shutdown
>>>>> # -F
>>>>> 23:00
>>>> 
>>>> "-f" got removed from Red Hat:
>>>> 
>>>> https://bugzilla.redhat.com/show_bug.cgi?id=784960
>>>> https://bugzilla.redhat.com/show_bug.cgi?id=733874
>>>> 
>>>> :'(
>>> 
>>> bad distro, change distro. More I'd say that RH seems to go out of
>>> the Linux/GNU path, for instance I have had the impression they're
>>> going to "use" (excuse the mind stretch here) systemd.
>> 
>> No surprise there, as Kay Sievers, who developed and maintains
>> systemd, is a RedHat employee, and RedHat fully supports and endorses
>> systemd.
> 
> Er, I thought it was some Lennart toy (and that Kay was the guy from
> U.D.E.V.)

It is possible that Kay Sievers is now also the maintainer for (the 
userspace portion of) udev, but as far as I know, udev is still the 
brainchild of Greg Kroah-Hartman, and Sievers and that Lennert guy - 
Lennert is his firstname actually - are the ones behind systemd.

>> Many of the newer releases of other distributions have already
>> switched to systemd by now, e.g. Mandriva, Mageia, openSUSE, possibly
>> PCLinuxOS, et al.  openSUSE 12.1 is the only still very new distro
>> release that actually still supports - and documents via their
>> website - removing systemd and installing the "old" (but improved)
>> System V init scripts.
> 
> well, long live Slackware then, good news :-)

Yes, I don't expect Slack to be switching to systemd any time soon.  
However, since the new udevd release now installs itself under "/usr", 
the breakage is already introduced, and so sooner or later even 
Slackware will have to adopt the new udev, and will no longer be able to 
boot without an initramfs or initrd if you happen to have "/usr" on a 
separate partition.

Well...  That is to say...  There is a workaround, but this will still 
require that "/usr" be mounted even when booting up in single-user mode.  
The workaround is to, instead of using an initrd/initrams - for instance 
if you roll your own kernels - use a pre-init script which mounts "/usr" 
(and whatever else you would like it to mount) and then calls the actual 
init via exec, like so...  (Note: location of GNU Bash and init adapted 
to the future scenario and using ext4.)

   #!/usr/bin/bash
   mount -t -ro ext4 /dev/sda2 /usr
   exec /usr/bin/init

You then store this script in, say, "/sbin", and then you invoke it via 
the kernel's parameter line in the bootloader - for LILO, that's on the 
"append=" line - like so...

   append="init=/sbin/pre-init.sh"

But of course, that too will break if "/sbin" is going to be a symbolic 
link to "/usr/sbin".  So they are really pushing the initramfs route.  

(I hate those things. :p)

>>> So, I'd think it's not only that -F on shutdown was removed from RH
>>> but that RH is now removed from distros list and should shutdown ;-)
>>> 
>>> (hey, we're in colmisc after all ;>)
>> 
>> This isn't RedHat's first sin, and it won't be their last either. 
>> They see themselves as an important component of the upstream
>> GNU/Linux development and as wayshowers/enforcers.
> 
> so why is it that they sound so much like showstoppers and puncturers?

Because they are pushing their agenda.  RedHat is in rather close 
cooperation with Oracle, which has acquired Sun Microsystems and has 
thus since become the "intellectual property" owner of Solaris.  And 
Solaris does it that way too.

>> ...
>> ext4 is cool - I've given it a test run and I can't say that there's
>> anything wrong with it insofar as I could see - but I still prefer
>> XFS,
> 
> yup, I usually prefer JFS and XFS to ext4, though I like some
> easygoers in ext4 like resizing both ways or self supported undeletes.

Like I meant to imply, I haven't played around with that yet.  I've only 
given it a quick test run so as to check its performance - not by way of 
benchmarks but simply while using it - and it seemed like a very usable 
and fast filesystem to me.

But either way, I expect that ext4 too is soon going to be deprecated in 
favor of btrfs, which some distributions are already beginning to offer 
and push.  btrfs is quite advanced and offers many of the possibilities 
of Solaris's ZFS, but it's still "not quite there yet".  Too soon for 
prime time right now.

>> because I'm used to that and I know it better.  RedHat/CentOS and
>> Fedora didn't let me select it, nor would they allow installation of
>> any component of the system on already existing reiserfs partitions.
> 
> well, I'll agree on that but I'll also admit that my experience on RH
> is quite old as I gave up trying to run them correctly on desktops
> circa 2K and my last attempts to use them on servers were 2K7 but as
> it seems they're still on their piling up toys to test their devs
> ability at understanding parallelism and mimicking a feline names
> oriented desktop products line, I guess there are few chances they
> have it repaired since ;->

I haven't actually used RedHat proper yet myself, but I do have 
extensive experience with CentOS - which is essentially the same thing - 
on our organization's servers.  However, our organization is also 
already defunct for a few years, so my experience with CentOS is a bit 
rusty too.  I think that the last version I installed - on a server 
which I own myself but which has in the meantime been reformatted and is 
currently non-operational - was CentOS 5.3.

As for Fedora, never liked it and never will be using it.  Completely 
unreliable, and you still get RedHat's not-so-benevolent dictatorship on 
top. ;-)

-- 
= Aragorn =
(registered GNU/Linux user #223157)

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Thread

How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 10:16 -0800
  Re: How do you use the "at" command? Lew Pitcher <lpitcher@teksavvy.com> - 2012-01-27 13:43 -0500
    Re: How do you use the "at" command? Lew Pitcher <lpitcher@teksavvy.com> - 2012-01-27 13:45 -0500
      Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-27 15:34 -0600
        Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 22:41 -0800
          Re: How do you use the "at" command? Loki Harfagr <l0k1@thedarkdesign.free.fr.INVALID> - 2012-01-28 10:27 +0000
            Re: How do you use the "at" command? Aragorn <stryder@telenet.be.invalid> - 2012-01-28 19:05 +0100
              Re: How do you use the "at" command? Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2012-01-28 10:26 -0800
              Re: How do you use the "at" command? Loki Harfagr <l0k1@thedarkdesign.free.fr.INVALID> - 2012-01-30 08:51 +0000
                Re: How do you use the "at" command? Aragorn <stryder@telenet.be.invalid> - 2012-01-31 03:16 +0100
                Re: How do you use the "at" command? Aragorn <stryder@telenet.be.invalid> - 2012-02-01 00:24 +0100
                Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-31 17:55 -0600
                Re: How do you use the "at" command? Aragorn <stryder@telenet.be.invalid> - 2012-02-01 02:01 +0100
                Re: How do you use the "at" command? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2012-01-31 21:36 -0500
                Re: How do you use the "at" command? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2012-01-31 21:25 -0500
                Re: How do you use the "at" command? Aragorn <stryder@telenet.be.invalid> - 2012-02-01 04:57 +0100
                Re: How do you use the "at" command? Darren Salt <news@youmustbejoking.demon.cu.invalid> - 2012-01-31 23:46 +0000
                Re: How do you use the "at" command? Aragorn <stryder@telenet.be.invalid> - 2012-02-01 02:12 +0100
  Re: How do you use the "at" command? Richard Kettlewell <rjk@greenend.org.uk> - 2012-01-27 19:10 +0000
    Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 11:17 -0800
      Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-27 15:34 -0600
  Re: How do you use the "at" command? unruh <unruh@invalid.ca> - 2012-01-27 20:26 +0000
    Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 22:51 -0800
  Re: How do you use the "at" command? Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2012-01-27 12:23 -0800
    Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-27 15:35 -0600
      Re: How do you use the "at" command? Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2012-01-27 17:22 -0800
        Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-27 20:25 -0600
          Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 22:49 -0800
            Re: How do you use the "at" command? Bit Twister <BitTwister@mouse-potato.com> - 2012-01-28 07:16 +0000
              Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 23:57 -0800
        Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 22:49 -0800
          Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-28 06:07 -0600
            Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-28 13:32 -0800
              Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-28 22:28 -0600
                Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-28 22:50 -0800
                Re: How do you use the "at" command? Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2012-01-28 23:35 -0800
                Re: How do you use the "at" command? unruh <unruh@invalid.ca> - 2012-01-29 18:46 +0000
                Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-29 12:03 -0800
                Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-29 15:38 -0600
                Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-29 16:58 -0800
                Re: How do you use the "at" command? unruh <unruh@invalid.ca> - 2012-01-30 01:36 +0000
                Re: How do you use the "at" command? Aragorn <stryder@telenet.be.invalid> - 2012-01-30 03:07 +0100
                Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-29 19:21 -0800
                Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-29 19:17 -0800
                Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-29 11:48 -0800
                Re: How do you use the "at" command? Robert Heller <heller@deepsoft.com> - 2012-01-29 07:35 -0600
                Re: How do you use the "at" command? Aragorn <stryder@telenet.be.invalid> - 2012-01-29 20:40 +0100
          Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-02-03 13:25 -0800
      Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 22:45 -0800
    Re: How do you use the "at" command? Todd <Todd@invalid.invalid> - 2012-01-27 22:42 -0800

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