Lsattr: Permission Denied While Reading Flags on

Author Message LordShaftesbu... This post is not being displayed .
LordShaftesbu...
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Posted: 10:00 - 03 Jun 2013 Post subject: UNIX file permissions trouble
A educatee has somehow managed to set up the permissions on one of their files to: Code: ---------- 1 student grouping 36749 2013-06-01 14:42 file.sdf Even equally root I can't change the permissions or even read the file: Code: # chmod 666 output.sdf chmod: changing permissions of `file.sdf': Operation not permitted # cat file.sdf cat: file.sdf: Permission denied I've done some googling and found mention of a special immutable bit, but manifestly that should show upwardly as a 't' at the end of the permissions. Anyhow, I can't check considering chattr doesn't piece of work either: Quote: # chattr -i file.sdf chattr: Permission denied while reading flags on file.sdf What the hell? Why can't root read this file?

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duhawkz
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Posted: 12:47 - 03 Jun 2013 Post field of study:
Accept you tried taking buying of information technology Chown root.root file.sdf And then resetting the permissions ____________________ "The guy is a worthless cunt and I honestly believe I would be a slightly happier person if he died." - Chris-Scarlet

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Posted: thirteen:xiii - 03 Jun 2013 Post subject:
Accept you checked for extra attributes using lsattr? If you are able to cp the file, you lot might get a quick workaround moving to a filesystem without linux style permissions (like a Fatty USB bulldoze, or an NTFS partition) Quite odd though, that root cannot read the file also every bit root being unable to change permissions. ____________________ Sometimes, I impact myself and smell my fingers.

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LordShaftesbu...
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Posted: 18:02 - 03 Jun 2013 Postal service bailiwick:
Code: # chown root.root file.sdf chown: changing ownership of `file.sdf': Operation not permitted # lsattr file.sdf lsattr: Permission denied While reading flags on file.sdf # cp file.sdf tmp cp: cannot open `file.sdf' for reading: Permission denied Apologies for the typo; the file is file.sdf not output.sdf.

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Posted: 22:26 - 03 Jun 2013 Post discipline:
What environment are you on here? what filesystem, is SELinux or equivalent in play here? can you successfully make a file, and chattr/lsattr it? The only affair I tin think of stopping chattr and lsattr is non-root permissions, or SELinux similar mischief. ____________________ Sometimes, I bear upon myself and scent my fingers.

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duhawkz
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Posted: 09:42 - 04 Jun 2013 Post subject:
Couple of other thingd you could check. Has an additional acl been set on the file, is the a + sign next to the standard file permissions. Does getfacl file.sdf Bring back whatsoever additional info Bank check selinux is off / set to permissive mode. Sestatus ____________________ "The guy is a worthless cunt and I honestly believe I would exist a slightly happier person if he died." - Chris-Crimson

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LordShaftesbu...
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Posted: 11:49 - 04 Jun 2013 Post subject:
Code: # ls -l file.sdf ---------- i student group 36749 2013-06-01 14:42 file.sdf # getfacl file.sdf # file: file.sdf # possessor: student # grouping: group user::--- grouping::--- other::--- SELinux is running but in permissive mode - I oasis't had whatsoever warning letters from it. The file is in a directory chosen tutorial, 'touch exam.txt' in that directory says permission denied despite the fact I'm root. Lawmaking: # ls -ld tutorial/ drwxr-xr-10 3 student group 4096 2013-06-01 14:42 tutorial/ Does the 'other' (user/group/other) set need write permission? I thought root could do anything?

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duhawkz
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Posted: 07:56 - 05 Jun 2013 Mail subject field:
Your correct root "should" be able to access more than or less every file on the system Have you tried copying the file or the directory to another area that you can definately write to, that manner the copy should inherit the permissions of the destination. Declining that rm -rf / should sort it out ____________________ "The guy is a worthless cunt and I honestly believe I would exist a slightly happier person if he died." - Chris-Red

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