[TriLUG] Maintenance of a systemd machine

[David Both via TriLUG]

A normal reboot always runs fsck to check the integrity of the 
filesystems before they are mounted. If a filesystem is past the time or 
number of reboots defined when they were created - or changed by tune2fs 
- a more detailed cleanup will be performed during the boot process.

However, if you need to do something beyond a "normal" fsck, you can 
boot to runlevel 1 or recovery mode and umount /var and /usr as they are 
not needed in runlevel 1. Run fsck on them and remount them. You could 
also try booting from a recovery CD or thumb drive and then run fsck on 
the appropriate drives, especially if you need to run it against the 
root filesystem. These are not normally remote types of operations 
unless you have some form of lights out management system that provides 
console access during boot - and someone to insert the bootable recovery 
medium.

Do you have a specific problem you are trying to fix?

I hope this helps.


On 01/07/2017 03:28 PM, Brian McCullough via TriLUG wrote:
> Folks,
>
> I hope that everybody is having a FUN snow ( ?? ) day.  Here, SouthWest
> of Raleigh in Apex, it was mostly ice with a dusting of snow on top, but
> I hear that others had more of the white stuff.
>
>
>
>
> In any case, I have a Debian SystemD machine where I need to run fsck on
> various filesystems, such as /var and /usr.
>
> Unfortunately, with a normally-running system, that is impossible, since
> those filesystems, and others, are mounted and in use.
>
> Even re-booting and choosing Recovery Mode gets me into a fully-mounted
> running system.
>
> Any suggestions for getting the system "almost" shut down so that I can
> run fsck on critical systems?
>
>
> Thanks,
> Brian
>
>

-- 


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David P. Both, RHCE
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