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Krog
Guru
Joined: 26 Jun 2007
Posts: 354
Location: Roma, Italy
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 Posted: Tue Jan 31, 2017 1:31 pm Post subject: |
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we are going close i think!
| Code: | | Authentication refused: bad ownership or modes for directory /home/krog |
i see:
| Code: | KROGPC-SKYLAKE /home # ls -l /home
totale 56
drwxr-xr-x 67 billa root 4096 31 gen 09.26 billa
drwxr-xr-x 4 root root 4096 6 giu 2012 ftp
drwxr-sr-x 283 krog krog 20480 31 gen 14.27 krog
drwx------ 2 root root 16384 18 feb 2009 lost+found
drwxr-xr-x 2 dhcp root 4096 3 feb 2009 p2p
drwxrwxrwx 2 root users 4096 21 gen 08.42 samba
KROGPC-SKYLAKE /home #
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i think all my permissions are a bit screwed because I changed entirely my pc, i attached the old /home disk and THEN i re-created all my users... probably most of the folders belonging to my main user (krog) took the first group available or something like that... what exactly is this "s" here: drwxr-sr-x ? the group was wrong too, i corrected that but the issue is still there.... maybe this s is the cause |
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Krog
Guru
Joined: 26 Jun 2007
Posts: 354
Location: Roma, Italy
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| Posted: Tue Jan 31, 2017 1:41 pm Post subject: |
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IT WORKED! i removed that damn s!
| Code: | KROGPC-SKYLAKE /home # chmod 755 krog
KROGPC-SKYLAKE /home # ls -l
totale 56
drwxr-xr-x 67 billa billa 4096 31 gen 09.26 billa
drwxr-xr-x 4 root root 4096 6 giu 2012 ftp
drwxr-sr-x 283 krog krog 20480 31 gen 14.32 krog
drwx------ 2 root root 16384 18 feb 2009 lost+found
drwxr-xr-x 2 dhcp root 4096 3 feb 2009 p2p
drwxrwxrwx 2 root users 4096 21 gen 08.42 samba
KROGPC-SKYLAKE /home # chmod 0755 krog
KROGPC-SKYLAKE /home # ls -l
totale 56
drwxr-xr-x 67 billa billa 4096 31 gen 09.26 billa
drwxr-xr-x 4 root root 4096 6 giu 2012 ftp
drwxr-sr-x 283 krog krog 20480 31 gen 14.32 krog
drwx------ 2 root root 16384 18 feb 2009 lost+found
drwxr-xr-x 2 dhcp root 4096 3 feb 2009 p2p
drwxrwxrwx 2 root users 4096 21 gen 08.42 samba
KROGPC-SKYLAKE /home # chmod u-s krog
KROGPC-SKYLAKE /home # ls -l
totale 56
drwxr-xr-x 67 billa billa 4096 31 gen 09.26 billa
drwxr-xr-x 4 root root 4096 6 giu 2012 ftp
drwxr-sr-x 283 krog krog 20480 31 gen 14.32 krog
drwx------ 2 root root 16384 18 feb 2009 lost+found
drwxr-xr-x 2 dhcp root 4096 3 feb 2009 p2p
drwxrwxrwx 2 root users 4096 21 gen 08.42 samba
KROGPC-SKYLAKE /home # chmod 000 krog
KROGPC-SKYLAKE /home # ls -l
totale 56
drwxr-xr-x 67 billa billa 4096 31 gen 09.26 billa
drwxr-xr-x 4 root root 4096 6 giu 2012 ftp
d-----S--- 283 krog krog 20480 31 gen 14.32 krog
drwx------ 2 root root 16384 18 feb 2009 lost+found
drwxr-xr-x 2 dhcp root 4096 3 feb 2009 p2p
drwxrwxrwx 2 root users 4096 21 gen 08.42 samba
KROGPC-SKYLAKE /home # chmod -s krog
KROGPC-SKYLAKE /home # ls -l
totale 56
drwxr-xr-x 67 billa billa 4096 31 gen 09.26 billa
drwxr-xr-x 4 root root 4096 6 giu 2012 ftp
d--------- 283 krog krog 20480 31 gen 14.32 krog
drwx------ 2 root root 16384 18 feb 2009 lost+found
drwxr-xr-x 2 dhcp root 4096 3 feb 2009 p2p
drwxrwxrwx 2 root users 4096 21 gen 08.42 samba
KROGPC-SKYLAKE /home # chmod 755 krog
KROGPC-SKYLAKE /home # ls -l
totale 56
drwxr-xr-x 67 billa billa 4096 31 gen 09.26 billa
drwxr-xr-x 4 root root 4096 6 giu 2012 ftp
drwxr-xr-x 283 krog krog 20480 31 gen 14.32 krog
drwx------ 2 root root 16384 18 feb 2009 lost+found
drwxr-xr-x 2 dhcp root 4096 3 feb 2009 p2p
drwxrwxrwx 2 root users 4096 21 gen 08.42 samba
KROGPC-SKYLAKE /home #
krog@KROGPC-SKYLAKE ~ %
Connection to 192.168.1.230 closed.
krog@krogbanana:~$ ssh 192.168.1.230
Last login: Tue Jan 31 14:39:23 2017 from 192.168.1.82
krog@KROGPC-SKYLAKE ~ %
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WIN WIN WIN WIN
thanks to everybody  |
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cboldt
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Joined: 24 Aug 2005
Posts: 1046
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| Posted: Tue Jan 31, 2017 1:48 pm Post subject: |
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| I assume the DEBUG log divulges information that you do not want to divulge to us. Review and edit the output before sharing it. |
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cboldt
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Joined: 24 Aug 2005
Posts: 1046
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| Posted: Tue Jan 31, 2017 1:59 pm Post subject: |
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"s" in that position represents "set group ID," affecting all new files and directories created under that directory.
Edit to add, `chmod g-s` would have cleared it directly.
One more addition, this was new to me, might be useful in general ...
| Code: | | chmod preserves a directory's set-user-ID and set-group-ID bits unless you explicitly specify otherwise. You can set or clear the bits with symbolic modes like u+s and g-s, and you can set (but not clear) the bits with a numeric mode. |
Last edited by cboldt on Tue Jan 31, 2017 2:04 pm; edited 1 time in total |
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Krog
Guru
Joined: 26 Jun 2007
Posts: 354
Location: Roma, Italy
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| Posted: Tue Jan 31, 2017 2:03 pm Post subject: |
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considering my /home folder is more or less 15 years old, passed by many hard disks and at least 3 different computers, it will remain a big mistery why and when that folder got this strange permission
thanks again to everybody, I learned something new today |
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cboldt
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Joined: 24 Aug 2005
Posts: 1046
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| Posted: Tue Jan 31, 2017 2:10 pm Post subject: |
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You may have lingering odd owners or permissions buried in your /home/krog directory. My /home directory, like yours, has passed from drive to drive and system to system, and collected all sorts of "trouble" due to my ineptitude. I think I found and cleared them all, using `find`, but I doubt I could summarize exactly what I did to make the structure consistent with what I expected and wanted.
FWIW, I had similar issues in the system too, same underlying cause, migration from one installation to another. |
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Krog
Guru
Joined: 26 Jun 2007
Posts: 354
Location: Roma, Italy
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| Posted: Tue Jan 31, 2017 2:18 pm Post subject: |
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| using chown and chgrp with -R option on the top of the home folder would fix everything, am i right? |
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cboldt
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Joined: 24 Aug 2005
Posts: 1046
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| Posted: Tue Jan 31, 2017 3:38 pm Post subject: |
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| Yes, for owner:group, you can use just `chown -R owner:group` for your home directory. The pickle I got myself in was affecting things like /var/cron and /var/mail, where owner:group was not consistent. |
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Krog
Guru
Joined: 26 Jun 2007
Posts: 354
Location: Roma, Italy
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| Posted: Tue Jan 31, 2017 3:40 pm Post subject: |
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as i have many symlinks under my home folder... a chown -R would follow these symlinks? that would be really unwanted
sorry, this is really a noob question, i understand that |
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cboldt
Veteran
Joined: 24 Aug 2005
Posts: 1046
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| Posted: Tue Jan 31, 2017 4:25 pm Post subject: |
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It's a good question. `man chown` covers the subject ...
| Code: | -R, --recursive
operate on files and directories recursively
The following options modify how a hierarchy is traversed when the -R option is also speci‐
fied. If more than one is specified, only the final one takes effect.
-H if a command line argument is a symbolic link to a directory, traverse it
-L traverse every symbolic link to a directory encountered
-P do not traverse any symbolic links (default) |
I'd test that, myself, on a limited hierarchy that involved a symlink to a place where owner and group were not "me," to be satisfied that "-P" acted the way I think it does. |
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khayyam
Watchman
Joined: 07 Jun 2012
Posts: 6227
Location: Room 101
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| Posted: Tue Jan 31, 2017 4:25 pm Post subject: |
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| Krog wrote: | | as i have many symlinks under my home folder... a chown -R would follow these symlinks? that would be really unwanted sorry |
Krog ... the default is '--dereference', so you would use '--no-dereference' (see: 'man chown').
| Code: | % su -
# touch /tmp/test
# exit
% ls -l /tmp/test
-rw-r--r-- 1 root root 0 2017-01-31 17:02 /tmp/test
% ln -s /tmp/test .
% ls -l test
lrwxrwxrwx 1 khayyam users 9 2017-01-31 17:02 test -> /tmp/test
% chown khayyam:wheel test
chown: changing ownership of 'test': Operation not permitted
% chown --no-dereference khayyam:wheel test
changed ownership of 'test' from khayyam:users to khayyam:wheel |
For completeness it might also be worth mentioning 'find . -type f', and '-type d', and zsh's 'glob qualifiers' '**/*(^@)' ... which could be used to exclude symbolic links.
HTH & best ... khay |
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cboldt
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Joined: 24 Aug 2005
Posts: 1046
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| Posted: Tue Jan 31, 2017 4:32 pm Post subject: |
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| khayyam brings up a good point, one I overlooked by assuming that the symlinks you referred to were symlinks to directories. the "-P" default only works against symlinks to directories. If you have symlinks to files, `chown -R` will operate on the referenced files unless you use --no-dereference |
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Krog
Guru
Joined: 26 Jun 2007
Posts: 354
Location: Roma, Italy
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| Posted: Tue Jan 31, 2017 4:34 pm Post subject: |
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| Thanks |
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