Power Outage and Improper Shutdown

[LRT]

today i had a power outage and my ubuntu server was running (not plugged in to an UPS) so it was immediately shutdown. i booted the machine, how do i check if everything is ok on it? it wasn't really running anything when it got shutdown, i don't think it was even logged in, but it was powered on.

what kind of checks should i do? is there something i could do like chkdsk on windows?

[audiomick]

I think one possibility is "fsck"
https://help.ubuntu.com/community/Sy...istration/Fsck

[LRT]

ok so I was about to execute this command when it tells me the following:

fsck -yt ext3 /

WARNING!!! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage. 

Do you really want to continue (y/n)?

I said no because this scared the crap out of me... what am I supposed to do?

[Ichtyandr]

do not fsck mounted partitions, rather you could force a check on next reboot, run this "sudo touch /forcefsck" and reboot

[Grenage]

If the drive you are checking is mounted, don't run the scan. Best thing to do is boot from a live CD and run a check there.

EDIT: Or follow Ichtyandr's advice, which is way simpler.

[audiomick]

Easiest would be to run it from the live CD. I am pretty sure it is on there. I used it about 4 weeks ago, and can't remember having had to download it to do so.

[LRT]

do not fsck mounted partitions, rather you could force a check on next reboot, run this "sudo touch /forcefsck" and reboot

will this command automatically attempt to fix errors?

EDIT: I've ran this command twice and both times it has rebooted and told me that /dev/sda3 has 1.1% non-contiguous files and /dev/sda2 has 2.3% non-contiguous files. Does this mean there are errors on the disk? How do i know if the errors were fixed?

[audiomick]

read

man fsck

for a full explanation of the options. I don't know enough about what it does to be willing to make a statement.

[Ichtyandr]

will this command automatically attempt to fix errors?

well "man fsck" says that "fsck is used to check and optionally repair one or more Linux file systems" read if for the explanation of what it does, or look here: http://linux.die.net/man/8/fsck

generally however I never had errors on power outages on Linux so far it behaves really well. Today e.g. I had about 10-15 sudden power interruptions due to abnormal weather conditions, last one while I was typing this and so far its ok

[LRT]

well "man fsck" says that "fsck is used to check and optionally repair one or more Linux file systems" read if for the explanation of what it does, or look here: http://linux.die.net/man/8/fsck

the manpage for fsck says to use the -a flag to "Automatically repair the file system without any questions". But how do I use this flag with:

sudo touch /forcefsck
reboot

there is no manpage for forcefsck.

please read my edit from post #7.