Cannot mount any CD/DVDs, only as root

[Anonymous]

Hello. Noob here, very first post/thread; though I already read all the docs (or most of them) and searched the forums.

I come from Slitaz Linux using as live system, but since this one went already obsolete in kernel and packages, and devs are struggling with its revival, I had to search for other options, and finally read about Antix.
Since I was looking for a live system as “minimal” as possible, able to work entirely on RAM, yet with a graphical desktop out of the box, I went for Antix base ISO, and burnt it into a DVD (I really wanted to try it the “old/purist” way first before trying on USB, but I didn’t have blank CDs, only DVDs).

My rig is UEFI, so I have to hit the ‘e’ key and add these additional parameters:
toram hwclock=local desktop=icewm
The hwclock option is because I’m booting the live system on a laptop with Windows 10 installed on hard disk.

So everything seems very nice in general, even though I have to customize quite some things first to adjust to my preferences; except for some few things, which I’ll better describe in different threads and this being the first.

I use SpaceFM for default. Perhaps I’m just ignorant, but I noticed no CD/DVD of any kind can be mounted as regular user, only as root. Any optical disk I try inserting and wait for it to be mounted, it always fails with an error graphic pop-up saying “File not found: /live/boot-dev”, because the system always tries to mount /dev/sr0 (or any number) to /live/boot-dev. And whole /live directory is owned only by root.
No other method works as regular user: neither through Control Center (same result) nor manually mount to another directory (“only root can do mount”).
At very least, after failing to mount any CD/DVD, it lets me eject it from SpaceFM -> Devices with no problems for some reason.

Other distributions such as openSUSE and Slitaz itself don’t have this issue; they just read sr0 and automatically mount it without root or any kind of change.

Is this actually “expected” in any Debian-based distribution? Or am I actually having a bad issue?
Could this behavior be “rightfully” changed, without going insecure or the like?
If I’m having a bad issue, could someone help please?

Thanks very much beforehand.

[Member sybok]

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Hi, I am not an expert but have few simple questions/suggestions (to provide additional information for the (more) experienced users).
I am not an expert but have few simple questions/suggestions:
1) Is your user in the appropriate group(s)?
See file ‘/etc/group’.
Mine contains line such as the 2 below ones:
cdrom:x:24:<username>
plugdev:x:46:<username>
2) Please post output of
inxi -Fxz
3) Please post relevant part of your ‘/etc/fstab’.
4) Could you please, just for sure, post output of (list /media/ folders with more data):
ls -ld /media/*/
Mine starts with ‘drwxr-xr-x 2 root root 4096’ for all except for ‘drwxr-x—+ 2 root root 4096 … /media/<username>/’.

I experience part of what you describe with my home-PC; cannot mount a device (if not root) unless it was automatically mounted but un-mount via SpaceFM works well.

Potentially helpful link: https://linuxconfig.org/how-to-mount-cdrom-in-linux

PS: I believe I have experienced similar issue CD-mount issue in Debian way back (perhaps some 10 years ago).

• This reply was modified 1 year, 8 months ago by sybok. Reason: PS added

[Anonymous]

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Sorry, forgot to mention that I have to use an external CD/DVD USB drive (/dev/sr1) because internal one is broken.

fstab:

# Added by make-fstab /dev/sr0
/dev/sr0     /media/sr0     auto     noauto,users,exec,ro     0 0
# Added by make-fstab /dev/sr1
/dev/sr1     /live/boot-dev     auto     noauto,users,exec,ro     0 0

Yes, user is in appropriate groups.

Rest of discussion was taken here by @Xecure, and since there’s already a possible answer there, I think contents within /media directory may not be related…

Thanks.

[Member sybok]

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Hi,

the excerpt from ‘/etc/fstab’ makes it much more clear.
I would probably create a new folder and set it as a new mount-point for ‘/dev/sr1’ instead of the current one, e.g.
1) Folder
sudo mkdir -p /media/ext_multi_drive
May require to set appropriate rights to the folder (via chown/chgrp/chmod) to be the same as the other folders.
2) Manually edit the ‘/etc/fstab/’ so that the last line shown in your post would read
/dev/sr1 /media/ext_multi_drive auto noauto,users,exec,ro 0 0
3) Then reboot and try it.
(Reboot may not be required if some other appropriate action is taken so that the system is made aware of the new ‘/etc/fstab’)

PS:
It would also be possible to edit sudoers file to allow you to run specific mount operations, for other devices/partitions, without requiring elevated permission(s).
I did that for a shared notebook for others to mount ‘/data/’ partition in a read-only mode.
Hence I have a growing list of TODO after a (fresh/new) system (re)install.

EDIT: I read the other thread/post mentioned; since you seem to boot from live CD, this gets things complicated and my advice does most likely not apply. 🙁

• This reply was modified 1 year, 7 months ago by sybok.
• This reply was modified 1 year, 7 months ago by sybok.

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