reboot not working with root

pentium10 · n00b Joined: 14 Jan 2008 Posts: 22

can be related to a Read-only filesystem that with root access
even if I type

1. reboot
2. /sbin/shutdown -r now

doesn't work?

the system has read only file system issues read this thread
https://forums.gentoo.org/viewtopic-t-645770-start-0-postdays-0-postorder-asc-highlight-.html

eccerr0r · Posted: Thu Jan 17, 2008 8:40 am Post subject:

it's possible a RO filesystem could cause these symptoms but most likely something corrupted run state.

You could try reboot -f (or reboot -n -f) to force an emergency reboot as your machine has already gone down due to mounting the disk read only.
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schachti · Posted: Thu Jan 17, 2008 9:17 am Post subject:

If all other attempts fail, you can use the magic sysrq key (if it is compiled into the kernel). If you have physical access to the machine press

ALT and SysRq and u (at the same time) to remount all partitions read-only
ALT and SysRq and b (at the same time) to reboot the computer

If you do not have physical access to the machine, you can do

pentium10 · n00b Joined: 14 Jan 2008 Posts: 22

I want to remount read-write not read-only.

Can I run an fsck before reboot?

schachti · Posted: Thu Jan 17, 2008 9:23 am Post subject:

pentium10 · n00b Joined: 14 Jan 2008 Posts: 22

I think it's already mounted read-only because I cannot alter the files.

eccerr0r · Posted: Thu Jan 17, 2008 9:51 am Post subject:

if you do run fsck on the disk you _must_ reboot the machine immediately after fscking so you'll still need to find a way to reboot the machine.

Either way you should not remount the disk r/w until you know that memory cache/buffers match what's on the disk (which is not due to failure).

Do you have serial console access to the machine?

Sometimes x86 machines are annoying due to this... hmm.
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching?

pentium10 · n00b Joined: 14 Jan 2008 Posts: 22

For now I can only SSH with Putty, or call the company to reset the PC.

schachti · Posted: Thu Jan 17, 2008 9:55 am Post subject:

Do you have write access to /boot? Then you could set up a little rescue system there, reboot into the rescue system, do the fsck on the / partition and then reboot again.
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pentium10 · n00b Joined: 14 Jan 2008 Posts: 22

I can write to /boot
but I don't know what commands or files to put there, I don't have any knowledge of this. I know a few things but those are limited to the following commands (cd,mc,vi,cp,tar,mysql,chmod ) small things.
Can you help me what shall I put there?

the /var is mounted, and that is read-only

schachti · Posted: Thu Jan 17, 2008 10:15 am Post subject:

What might be helpfull: https://forums.gentoo.org/viewtopic.php?t=265905. That is a thread about how to boot a LiveCD image from a vfat partition using grub. I think you've already installed grub, and instead of a vfat partition, you can put the LiveCD image to your /boot partition where you still have write access. It won't be easy, especially if you are not familiar with linux, but if you do not have physical access to the machine, you do not have many alternatives.
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Never argue with an idiot. He brings you down to his level, then beats you with experience.

How-To: Daten verschlüsselt auf DVD speichern.