Script that runs before fstab
 

On CentOs7, if I have this line in /etc/fstab:

/dev/sda6 /mnt/tempdir ext4 default 0 0

But I may NOT have /mnt/tempdir yet.

What script I can use to add command to
create directory /mnt/tempdir such that
init process runs it before init runs /etc/fstab
via command mount -a?

With fstab the patitions are mouted.
I think it is not possible to create a directory below /mnt before the lines in fstab are executed.
You can create that directory manually from command line in run level 3 or 5.

Normally, /mnt is on a permanent filesystem (as part of the root filesystem). Once the subdirectory is created, it will be available on the next boot - thus available before the mount operation gets done.

Indeed, once you have created that directory it will stay there. If you just need the boot to proceed regardless, you could use the "nofail" option.

I thought using rc.local might be a solution using these commands:

Then change ownership of rc.local to execute on reboot:
chmod +x /etc/rc.d/rc.local

I have also commented out mount command in /etc/fstab.
But when I reboot I see these in /mnt/tempdir:

So it works......
But notice I did not specify quota in rc.local.
So why is aquota.user added auto-magically?
What causes it?

Addendum:

But now I have another problem:


Why am I not able to do quotacheck?

Thank you.

Look here , or here or here for Centos guide.

Seems you might need to enable quota in /etc/fstab first.

Here is the "solution":

I added userquota to rc.local like so:
On reboot, here is what I see:
Then ran quotacheck to create aquota.user file:
But I do not know why aquota.user in /mnt/tempdir1 was created when I did not use the usrquota option in mount command as described in my previous post.

Here is a manpage for quotacheck

But I did not ran quotacheck at the time before I look at /mnt/tempdir1.
I just boot up and look at /mnt.tempdir1,
and aquota.user shows up.
I also deleted tempdir1 before reboot!

Maybe the /dev/sda5 was mounted some time ago, with quotas enabled?

I still do not understand why a simple entry in fstab plus one time a mkdir does not work for you.

Not sure.
I may have to delete and a retry....

I was trying to do it using scripts and config files.

It turns out you do not have to create the path and subdirectory needed for a mount point. It is created (by who?) when command in /etc/fstab were executed at boot time.

I unmounted /mnt/tempdir, and deleted all directories in /mnt.
I also commented out everything I did in /etc/rc.local
Then created another partition, /dev/sda8, format it with ext4, and put it in /etc/fstab like so:
/dev/sda5 /mnt/tempdir ext4 defaults 0 0
/dev/sda8 /mnt/temp ext4 default 0 0

Recall that /dev/sda5 is the partition that auto-magically has aquota.user when it is mounted to /mnt/tempdir.

and now I reboot ...there is no aquota.user auto-magically create for /dev/sda8 in /mnt/temp:

So I suspect there is a command that I may have done previously that creates aquota.user in /mnt/temp as shown here:
Question#1: Why is directory "lost+found" not shown in /mnt/tempdir but it is shown in /mnt/temp?

Below shows sda5 and sda8 are type ext4:
I thought quota was enable in /mnt/tempdir, but that is not the case:
Question#2:
Recall that there is nothing in /etc/fstab or /etc/rc.local command line that cause the creation of quotas in /mnt/tempdir, so how do I prevent aquota.user from being created in case for /dev/sda5?