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Re: Problem attempting to use xorriso

On 11/10/2016 7:58 AM, tomas@tuxteam.de wrote:

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On Thu, Nov 10, 2016 at 07:40:06AM -0600, Richard Owlett wrote:

On 11/10/2016 5:20 AM, tomas@tuxteam.de wrote:

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On Thu, Nov 10, 2016 at 04:53:47AM -0600, Richard Owlett wrote:

On 11/9/2016 5:16 PM, Lisi Reisz wrote:

On Sunday 06 November 2016 16:47:00 Richard Owlett wrote:

[snip]
Based on responses to previous posts titled "Trivial script will
NOT execute" and "Permissions for an entire PARTITION" I have
multiple problems understanding Linux file systems generally.


I imagine you have seen this lot - especially the top three??
https://www.google.co.uk/search?q=basic+debian+file+system&oq=basic+debian+file+system&aqs=chrome..69i57.7617j0j7&sourceid=chrome&ie=UTF-8

Lisi


Yes, but not in the context of a sub-project from last few days.
I suspect what I aiming at might look like - the groups and
permission bits set at time partition created, thus avoiding games
with /etc/fstab .

richard@jessie-defaults:~$
richard@jessie-defaults:~$ ls -l /dev/sd*
brw-rw---- 1 root disk 8,  0 Nov 10 03:35 /dev/sda
brw-rw---- 1 root owl  8,  1 Nov 10 03:35 /dev/sda1
brw-rw-r-- 1 root owl  8,  2 Nov 10 03:35 /dev/sda2
brw-rw---- 1 root disk 8,  3 Nov 10 03:35 /dev/sda3
brw-rw---- 1 root disk 8,  5 Nov 10 03:35 /dev/sda5
brw-rw---- 1 root disk 8, 16 Nov 10 04:43 /dev/sdb
br--rw-r-- 1 root owl  8, 17 Nov 10 04:43 /dev/sdb1


Note that with this setting, "you" can thrash whatever is in /dev/sda
through /dev/sdb (write access).


I don't understand.


Hm. Too concise (both of us ;-)

I'll give it a shot. By "you" I meant "user owl, i.e. any program running
under that user". Was that the unclear part?
If not, it was likely related. "owl" was not intended to be a user ID, but a group ID. That's why in my long winded response I changed "owl" to one of "proj1", "proj2", or "proj3" and clairified that I am user "richard" of group "richard".
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