mount iso in single user mode
 

Hi!

Virtualbox Slackware64-current
I somehow lost a few files in a folder /etc/pam.d.
So I can not boot root (or any other user).
I can boot into a single user mode and
works, so I can access the system read/write.
I wish to copy missing files from another working VBOX Slackware (same version).
I've created an ISO image from a working /etc/pam.d with all files included.

When I want to mount that ISO, I got:
If I try to force -ro mount, then I got:
How to mount ISO to copy files from it?
Is there any other option? - There's no network, no modules, so I see only ISO mount possible.

mount iso in single user mode
 

what command are you using to mount the iso file?

it looks like you might be missing something.

mount -t iso9660 -o loop /<path to iso> /<path to mount point>

/sbin/mount /dev/sr0 /mnt/tmp

And I found out, there's no /dev/sr*

In a mean time, I simply added another working instance as a secondary drive to VirtualBox. At boot I had /dev/sda1 (root) and /dev/sdb1 - another working slackware64-current Virtualbox drive. I copied files as mentioned in a previous post.
And :) :) at next boot, the system booted normally.

So my main problem is solved, but I'm still interested, how to mount ISO image from a single user mode.

Did you copy the ISO file from the working guest to the host?
How is your guests optical drive configured i.e as passthrough or virtual device?

Configured as a virtual device did you select the ISO file using the devices -> optical drive menu? That "inserts" the ISO file into the virtual disk drive. Once the ISO is "inserted" you can then mount it via

mount -t iso9660 /dev/dvd /mnt (or as desired...)

Yes Configured as a virtual device did you select the ISO file using the devices -> optical drive menu.
And the problem is, no new entry is created in /dev/ There are only sda and sda1 disks, no other. And strange "Remove disk from virtual drive" is clickable, reflecting image is inserted. When I click on it, tick is removed in front of image and "remove disk .." become grey.

Looks like Slackware in single user mode do not insert image/CD and /dev/XYZ is not created.

Just a guess: probably you need to boot first and insert the disk when the system is already running.

Thanks for hint, but this did not helped.
Whatever I do with ISO (insert/remove) prior or after booting, the /dev folder is always the same, no devices created. I do not have a device to mount.
You can see attached picture - booted single user Slackware storage in a VirtualBox Manager. SATA Port 1 VboxGuestAdditions.iso attached but no device created.
dmesg - last message regarding / mounted as rw, ISO insertion not traced.
/var/log/ - not a single file change after ISO insertion.

Thinking of my kernal compilation - minimalistic to boot without (for me stupid) initrd all other compiled as modules including loop. I exclude hardware I do not have, to speed up kernel & modules compile and to lower kernel/modules footprint on the disk. (over 20 years practice)
This might be the key.

If I boot normally (3 - multiuser) and logon as root, then device is created and can be mounted.

For those who prefer initrd:
I always have problems at fresh Slackware install. Booting do not work, as some devices are compiled as modules (USB, years ago EXT4..). So after install I have to boot from install media, and guess which modules to include into initrd. And this "guess" = some iterations, time consuming, finger breaking..

but you can try to mount that vdi in another working VM or you can try to mount a regular directory from outside (as shared folder).

Yes, that was a solution - my post here 13th Jul 2020 15:11

I'll close as solved.

you are welcome.
If you really want to say thanks just click on yes.