Linux permission issue, can you explain this...

sam_nyc · 04-01-2021, 12:08 PM

I am having weird permission issues. can you someone help me.

Code:

[root@web2 PU3120421]# ls -la
total 3208
drwxrwsrwx     6 xxweb  bh_lab    170 Mar 31 10:44 .
drwxrwsrwx 10184 user1pet bh_lab 274914 Mar 31 10:46 ..
drwxrwsrwx     2 xxweb  bh_lab    182 Mar 31 10:49 models
drwxrwsrwx     2 xxweb  bh_lab      0 Mar 31 10:19 partner
drwxrwsrwx     2 xxweb  bh_lab      0 Mar 31 10:19 partner_models


-bash-4.2$ touch 123
touch: setting times of ‘123’: Permission denied


-bash-4.2$ ls -lt
total 312
----rwx--- 1 honigwb bh_lab     0 Apr  1  2021 123
----rwx--- 1 honigwb bh_lab     0 Mar 31 10:49 xyz
-rwxrwx--- 1 xxweb   bh_lab 62980 Mar 31 10:44 1f51_E.1_E.pdb
----rwx--- 1 honigwb bh_lab     0 Mar 31 10:41 1f51_E.1_E.pdb~
----rwx--- 1 honigwb bh_lab     0 Mar 31 10:41 4913

I typed touch 123 and I get error message permission denied but it creates the file as you can see above... but it comes as 070

not sure why?

RickDeckard · 04-01-2021, 12:26 PM

Can you check your default umask for me? Go to the terminal, type "umask" and let us know what it says

pan64 · 04-01-2021, 12:45 PM

that is written: file is successfully created, but failed to set time - because of the permissions.
Need to know umask settings and also access rights on that dir and current user (at least)

sam_nyc · 04-01-2021, 01:02 PM

Thanks for the quick reply RickDeckard and Pan64.

Quote:

-bash-4.2$ umask
0022

tramsch · 04-01-2021, 02:30 PM

Hi sam_nyc,

in your output you sued to a user and changed dir.

Please give us the following after switching to the user and dir (pan64 actually asked already :-) )

Code:

whoami
pwd
ls -ld .

sam_nyc · 04-01-2021, 03:56 PM

Quote:

Originally Posted by tramsch

Hi sam_nyc,

in your output you sued to a user and changed dir.

Please give us the following after switching to the user and dir (pan64 actually asked already :-) )

Code:

whoami
pwd
ls -ld .

[root@web2 models]# whoami
root
[root@web2 models]# pwd
/ifs/data/c2b2/bh_lab/shares/hfpd/web/PredUs_new/www/data/job_data/PU3120421/models
[root@web2 models]# ls -ld .
drwxrwsrwx 2 bhweb bh_lab 203 Apr 1 12:59 .
[root@web2 models]# umask
0022

pan64 · 04-02-2021, 02:42 AM

you missed some steps. What you posted was generated with root account, but we need that info using the same account (when you executed that touch).

sam_nyc · 04-02-2021, 03:40 PM

Quote:

Originally Posted by pan64

you missed some steps. What you posted was generated with root account, but we need that info using the same account (when you executed that touch).

Code:

-bash-4.2$ umask
0022
-bash-4.2$ whoami
honigwb
-bash-4.2$ cd /ifs/data/c2b2/bh_lab/shares/hfpd/web/PredUs_new/www/data/job_data/PU3120421/models
-bash-4.2$ ls -ld .
drwxrwsrwx 2 bhweb bh_lab 203 Apr  1 12:59 .

!!! · 04-02-2021, 07:10 PM

NFS? Show us

df .

Or cifs? Try: strace (touch ...)

Apr 1 2021 123
Indicates (maybe like): your time is a drastic mismatch to the file server's time!

tramsch · 04-03-2021, 12:53 PM

I am still a little bit puzzled :-)

Could you please give additionally, while in the models dir

Code:

df -h .
mount
id honigwb

?

hoes · 04-05-2021, 04:07 AM

You haven't yet showed the group of honigwb, so I also look forward to the output of id.
Do you have SELinux enabled or access control lists?
If so than you also need to look at what restrictions they enforce on the current file.

sam_nyc · 04-05-2021, 11:58 AM

Hi,

Please help.

Quote:

-bash-4.2$ umask
0022

-bash-4.2$ id
uid=2152(honigwb) gid=5996(bh_lab) groups=5996(bh_lab),6082(service_acct),6114(bh_webgrp)

-bash-4.2$ df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 185M 1.7G 10% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 6.0G 12G 35% /
/dev/xvda1 1014M 227M 788M 23% /boot
tmpfs 378M 0 378M 0% /run/user/0
isilon.hpc:/ifs/home 2.6P 847T 1.7P 34% /ifs/home
isilon.hpc:/ifs/scratch 555T 368T 188T 67% /ifs/scratch
isilon.hpc:/ifs/data 125T 56T 70T 45% /ifs/data
10.116.211.102:/sysops 5.1T 4.0T 1.1T 79% /q/sysops
webfs.hpc:/data/www 1.5T 773G 629G 56% /ifs/www
tmpfs 378M 0 378M 0% /run/user/3637
tmpfs 378M 0 378M 0% /run/user/3537

-bash-4.2$ id honigwb
uid=2152(honigwb) gid=5996(bh_lab) groups=5996(bh_lab),6082(service_acct),6114(bh_webgrp)

-bash-4.2$ pwd
/ifs/data/c2b2/bh_lab/honigwb
-bash-4.2$ cd /ifs/data/c2b2/bh_lab/shares/hfpd/web/PredUs_new/www/data/job_data/PU3120421/models

-bash-4.2$ df .
Filesystem 1K-blocks Used Available Use% Mounted on
isilon.hpc:/ifs/data 15032385536 13717506048 1314879488 92% /ifs/data

-bash-4.2$ sestatus
SELinux status: disabled

-bash-4.2$ date
Mon Apr 5 12:57:15 EDT 2021
-bash-4.2$

shruggy · 04-05-2021, 12:22 PM

See 7.4. I do not have permission to access files on the mounted volume in Linux NFS-HOWTO.

pan64 · 04-06-2021, 01:08 AM

yes, I can only repeat:
umask looks ok, you are on the filesystem: isilon.hpc:/ifs/data.
We know your user id and dir, but we still don't know how is this filesystem mounted (and we also don't know the settings of the original filesystem/OS).
The file you touch-ed was successfully created, but the owner (honigwb) has no any right on it, therefore time cannot be set.
(is this your homework or exam?)

!!! · 04-06-2021, 05:19 PM

Edit: I might be wrong, based on post #14 above ownership reason.
https://unix.stackexchange.com/quest...-writable-file
https://support.oracle.com/knowledge...1575824_1.html
(But I forgot my Oracle account, so I can't see it)
HW?: https://m.youtube.com/watch?v=tcVL53c5d04
Excuse my word salad.

Try the same (permission restrictions) on a local file system, to see if your scenario behaves the same.

mount | grep ifs/data
(Also on file server isilon.hpc)
Maybe also check the NUMERIC uids on both machines. (/etc/passwd)

Carefully COMPARE and show us the (true maybe meaning UTC) date
on both this machine and the file server isilon.hpc

Note my comment about how `ls` only reports the date and not the time IF the inode time is in the future!

stat give lots of details about an inode

I'm suspecting the time on the file server, where the inode actually lives, is in the future, relative to this machine. You can do some web research about this condition with NFS