How to run a script automatically just before Reboot or Shutdown

sharris · 2010-06-23 18:38:28

Hello all,

Could someone tell me what folder or what entries to be made if I want an event to take place before the machine actually start the reboot/shutdown process. For instants, i usually mount my USB flash drive but sometime I forget to umount it, which will cause a dirty file system when restarting the machine. Would anyone have an example to get me going. It's just like when rc.conf will do added things for you during start-up if special code/script was inserted.

There are other things I like to do before the machine reboot or shutdown, like, to run a very small scripts to automatically kill a certain process "first", before the rest and before rebooting. I'm sure I can write the code but I don't know where it goes.

Thanks in advance

PS: Thanks fsckd, Your explanation of SKIP/SEEK for dd has never been explained so well in any documentation, or on ANY web-site I ever been to in 6 months pass. Now I know how it really works and i'm getting it down to a science. I did not use it for what my thread indicate because in the end the other suggestions were better, but still I Thank God I finally know how to use SKIP/SEEK in dd. dd is my most use tool for what I do.

ataraxia · 2010-06-23 18:46:55

I think you want /etc/rc.local.shutdown . This runs right before the daemons are stopped.

fsckd · 2010-06-23 18:49:52

umm ... you're welcome, sorry if I was a bit harsh ...

As for your question, see /etc/rc.local and its analogue /etc/rc.local.shutdown .

edit: hello ataraxia

Last edited by fsckd (2010-06-23 18:51:17)

milomouse · 2010-06-23 18:51:00

I put my stuff in /etc/rc.shutdown as mentioned already. If you want something simple for your shutdown/reboot stuff I'd just use it as a function in your shell rc file. If you're worried about making sure it's unmounted, the script or function could include something like:

reboot() {
if [ -b /dev/disk/by-uuid/XXXXX ]; then
  umount /dev/disk/by-uuid/XXXXX
fi
reboot
}

Same with poweroff or halt, whatever. Just an idea..
(typo)

Last edited by milomouse (2010-06-23 18:54:19)

sharris · 2010-06-24 02:12:53

Wow! I just added this and it works great ...

cd/    # to move out of the mounted directory if I was in it under another terminal.
Sleep 1 # give it room to think
ls    # to see changed directory on screen
Sleep 1 # give it room to think
umount /b    # do the main thing
Sleep 1 # give it room to think

There something new every day to learn with this OS. Just when you get one thing right here's comes another. I guest it took 20 years to build LINUX and I read the kernel has something like 10 - 30 million lines of code or better. Some how I lost the better link that went much deeper. 30 million lines of code mean billions of documentation to read. But you still got to find the right one first. So I guest we read and still have to ask questions just to get to the good parts, and than ...

http://en.wikipedia.org/wiki/Source_lines_of_code

Thanks again

iphitus · 2010-06-24 08:32:58

sharris wrote:

Wow! I just added this and it works great ...
cd/    # to move out of the mounted directory if I was in it under another terminal.
Sleep 1 # give it room to think
ls    # to see changed directory on screen
Sleep 1 # give it room to think
umount /b    # do the main thing
Sleep 1 # give it room to think
There something new every day to learn with this OS. Just when you get one thing right here's comes another. I guest it took 20 years to build LINUX and I read the kernel has something like 10 - 30 million lines of code or better. Some how I lost the better link that went much deeper. 30 million lines of code mean billions of documentation to read. But you still got to find the right one first. So I guest we read and still have to ask questions just to get to the good parts, and than ...
http://en.wikipedia.org/wiki/Source_lines_of_code
Thanks again

Arch should already automatically unmount your USB drive. If it isn't unmounted, that's a bug and ought to be filed at http://bugs.archlinux.org

SealsRock12 · 2018-04-14 03:14:20

You can use Cron:
here is the link

circleface · 2018-04-14 03:57:50

Please do not necrobump old threads, especially ones that aren't even using technology still included by default with arch. rc.local has been deprecated since systemd came around.

seth · 2018-04-14 06:14:20

And
* cron is not event triggered while
* systemd has hooks in /usr/lib/systemd/system-shutdown/ and
* devices should™ be unmounted automatically anyway by now.

V1del · 2018-04-14 09:44:40

Please pay attention to the dates.

Don't necrobump: https://wiki.archlinux.org/index.php/Co … bumping.22

Closing.

Last edited by V1del (2018-04-14 09:45:31)

Arch Linux

#1 2010-06-23 18:38:28

How to run a script automatically just before Reboot or Shutdown

#2 2010-06-23 18:46:55

Re: How to run a script automatically just before Reboot or Shutdown

#3 2010-06-23 18:49:52

Re: How to run a script automatically just before Reboot or Shutdown

#4 2010-06-23 18:51:00

Re: How to run a script automatically just before Reboot or Shutdown

#5 2010-06-24 02:12:53

Re: How to run a script automatically just before Reboot or Shutdown

#6 2010-06-24 08:32:58

Re: How to run a script automatically just before Reboot or Shutdown

#7 2018-04-14 03:14:20

Re: How to run a script automatically just before Reboot or Shutdown

#8 2018-04-14 03:57:50

Re: How to run a script automatically just before Reboot or Shutdown

#9 2018-04-14 06:14:20

Re: How to run a script automatically just before Reboot or Shutdown

#10 2018-04-14 09:44:40

Re: How to run a script automatically just before Reboot or Shutdown

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