Fsck on ubuntu

alpha_lt · 11-01-2009, 10:44 AM

Hello all,

I have several question on using fsck on Ubuntu. As I know its not possible to use fsck on mounted system. Booting other system from USB is not an option for me. The best for me is doing fsck on boot time. Questions:
1. Will shutdown -F -r now work on ubuntu. I used man shutdown and did not find -F option, so maybe its not for ubuntu ?
2. How can I set options for fsck which will run on system boot ?
3. Where I can see logs of fsck that run on boot time ?
4. As I know fsck runs every 35 (don't know exactly) boots of system. How can I change this value

I will be very greatful if I get answers to these questions.
Thanks in advance.

Best regards,
alpha

AlucardZero · 11-01-2009, 11:06 AM

1. -F is in Debian, so I have no idea why it wouldn't be found in Ubuntu
4. use tune2fs to change the number of mounts after which your ext3 filesystems will be checked

repo · 11-01-2009, 11:09 AM

Quote:

1. Will shutdown -F -r now work on ubuntu. I used man shutdown and did not find -F option, so maybe its not for ubuntu ?

It works on debian.
Why don't you try?

Quote:

2. How can I set options for fsck which will run on system boot ?

You can use

Code:

tune2fs -c

or install autofsck
https://wiki.ubuntu.com/AutoFsck

Quote:

3. Where I can see logs of fsck that run on boot time ?

/var/log/fsck/

Quote:

4. As I know fsck runs every 35 (don't know exactly) boots of system. How can I change this value

see #2

alpha_lt · 11-01-2009, 12:17 PM

Thank you very much for such detailed answer !

Regards,
alpha

alpha_lt · 12-31-2009, 08:57 AM

Hello,

I want to return little bit to this topic. For example e2fsck runs in boot time, but with what parameters it runs ? I mean normally from command line you use:

Code:

e2fsck [ -pacnyrdfvstDFSV ] [ -b superblock ] [ -B blocksize ] [ -l|-L bad_blocks_file ] [ -C fd ] [ -j external-journal ] [ -E extended_options ] device

What about running at boot time ? What device will be scanned and what scanner options will be used ? Normally question is with what command line will run e2fsck at boot time ? Thanks.

AlucardZero · 12-31-2009, 09:20 AM

If you have the file /etc/init.d/checkfs.sh, you can read it for details. If not, grep for "fsck" in /etc/init.d/* and look at the boot scripts fsck is found in. On my system, the ultimately used command line is

Code:

fsck -C3 -R -A

alpha_lt · 12-31-2009, 09:25 AM

That's what I wanted. Thank you very much !