Manual fsck

[Sigurd]

Hello,
I replaced the stable running Kubuntu 14.04.3 LTS (but without working Sane; see Kubuntu 14.04 hardware support) with the hopefully longlasting Kubuntu 15.10 (but with working Sane). The problem of Scanning is solved. But the last time I had Kubuntu 15.10 installed it worked for 6 days. I got the information of an "unexpected inconsistency". And I was asked to do a manual fsck. How can I do such a manual fsck with a not fully booted OS?
Kind regards,
Sigurd

[claydoh]

the easiest way is to boot to recovery mode from the Grub menu, where there will be an option to run fsck.

[Sigurd]

Hello claydoh,
I don't know how I can manually boot to grub? When there is a problem grub will start and I can go for the recovery mode. What I did. And of course after this in the menu I have chosen to run fsck. It interrupts with an error and the text "unexpected inconsistency" and " run manually fsck". At this point how can I run fsck manually (as recommended)? And when I rebooted I always got to this point. And of course I don't know if running fsck manually will fix the problem at all.
Kind regards,
Sigurd

[vinnywright]

to do it manually

do you still have your install media ?

if so fire it up and

sudo e2fsck -p /dev/sda3

this assumes you have a "ext2-3or4" filesystem and the partition you wanted to check was /dev/sda3


VINNY

[Qqmike]

do you still have your install media ?

That reminds me, I think GParted live CD/USB will check partition-file systems, too.

[Sigurd]

Solved

Hello,
thank you very much vinnywright and Qqmike. I hope Kubuntu 15.10 will last a long time and not fail. But in case I now know what I have to do.
Kind regards,
Sigurd

[Sigurd]

Hello,
Thank you very much vinnywright!
As usual I started my computer this morning. I did not start Kubuntu 15.10 completely. I ended up with a small piece of the background picture at the left upper corner. Only with a "hard" turn off I could restart the computer. Now I got the following information: BusyBox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1) built-in shell (ash). Enter 'help' for a list of built-in commands. (initramfs) and a flashing cursor. As you recommended I typed "e2fsck -p /dev/sdb1". And I got the Information: /dev/sdb1: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY (i.e., without -a or -p options). So I typed: "e2fsck /dev/sdb1". Now I followed the instructions because it looked like that every single mistake was fixed now. After all I rebooted. Now I got into the Grub and into the recovery mode. And from here I finally could run "clean". It cleaned several files including the oldest Linux kernel. With dpkg was the file "about-distro kubuntu-desktop" installed. I continued with booting. But the end was that small background picture again. So I went through the entire process again. "clean" removed the now latest Linux kernel. Only the recent Linux kernel remained. The result of all this you can see: Kubuntu 15.10 is running again.
Thnak you,
Sigurd

[Sigurd]

Hello,
today Kubuntu 15.10 failed to start again. And again I had to run the above mentioned procedure twice to get it back running. Conclusion: Kubuntu 15.10 really is NOT a stable running system.
Kind regards,
Sigurd

[Sigurd]

Hello,
thank you very much for all the help I found here in this forum.
After all Kubuntu 15.10 failed to start with Plasma5 crashed. A new installation did not change anything. Now I am running Netrunner.
Kind regards,
Sigurd

[ghostnetwork]

i tried all the above. sudo isn't even recognized and almost all the commands won't let me into anything at all i get a permission denied or doesn't exist message.

[ghostnetwork]

With some browsing around the forums I tried a simple

fsck /dev/sda2


Responded yes to everything and it's back to normal.

I was attempting from USB at the time of the issue.