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Can't read a file although it's in my group and permissions for group read are set
Trouble understanding why getfattr -d doe not show anythingDefault directory permissions over NFSWhat has priority - owner/user vs group permission?Understanding UNIX permissions and file typesexecute a script with some permissionUser in the same group new/edit files permissionsRestrictive “group” permissions but open “world” permissions?Are there superset/subset relations between the sets of permissions of user owner, work group and other for a file?How to Allow User Access to a Specific File in a Restricted Directory?Nginx requires identical permissions for a whole path up to a directory “assets” of my app to be able to read and serve assetsUnix File Permissions and Decryption with OpenSSL's enc command
I encounter a strange problem on a unix/linux machine:
I'm member of a group, let's call it group A and a certain file (which has a different owner) belongs to group A as well. The permissions of that file are
-rw-rw----
so I'd expect I should be able to open that file, but I am not: I'll get the "Permission denied" error message when I try to look at the file's content (using cat).
Since the permissions seem to be correct, what else could be causing this? Are there "overriding" permission restrictions in place? If so, how would I find out?
permissions files nfs group
|
show 6 more comments
I encounter a strange problem on a unix/linux machine:
I'm member of a group, let's call it group A and a certain file (which has a different owner) belongs to group A as well. The permissions of that file are
-rw-rw----
so I'd expect I should be able to open that file, but I am not: I'll get the "Permission denied" error message when I try to look at the file's content (using cat).
Since the permissions seem to be correct, what else could be causing this? Are there "overriding" permission restrictions in place? If so, how would I find out?
permissions files nfs group
2
What about directory permissions?
– Karlson
Oct 13 '12 at 18:04
If you are in multiple groups, is your current group set to A?
– Code-Guru
Oct 13 '12 at 19:49
2
@Karlson, if directory permissions were the issue, you wouldn't be able to see the file's permissions in the first place.
– cjm
Oct 13 '12 at 22:02
Show us the full path and filename please.
– jippie
Oct 14 '12 at 9:13
It's in /home/theotheruser/somefolder/bla.txt I am in multiple groups.
– Lagerbaer
Oct 14 '12 at 18:31
|
show 6 more comments
I encounter a strange problem on a unix/linux machine:
I'm member of a group, let's call it group A and a certain file (which has a different owner) belongs to group A as well. The permissions of that file are
-rw-rw----
so I'd expect I should be able to open that file, but I am not: I'll get the "Permission denied" error message when I try to look at the file's content (using cat).
Since the permissions seem to be correct, what else could be causing this? Are there "overriding" permission restrictions in place? If so, how would I find out?
permissions files nfs group
I encounter a strange problem on a unix/linux machine:
I'm member of a group, let's call it group A and a certain file (which has a different owner) belongs to group A as well. The permissions of that file are
-rw-rw----
so I'd expect I should be able to open that file, but I am not: I'll get the "Permission denied" error message when I try to look at the file's content (using cat).
Since the permissions seem to be correct, what else could be causing this? Are there "overriding" permission restrictions in place? If so, how would I find out?
permissions files nfs group
permissions files nfs group
edited Oct 15 '12 at 8:37
Stéphane Chazelas
311k57587945
311k57587945
asked Oct 13 '12 at 17:28
LagerbaerLagerbaer
171115
171115
2
What about directory permissions?
– Karlson
Oct 13 '12 at 18:04
If you are in multiple groups, is your current group set to A?
– Code-Guru
Oct 13 '12 at 19:49
2
@Karlson, if directory permissions were the issue, you wouldn't be able to see the file's permissions in the first place.
– cjm
Oct 13 '12 at 22:02
Show us the full path and filename please.
– jippie
Oct 14 '12 at 9:13
It's in /home/theotheruser/somefolder/bla.txt I am in multiple groups.
– Lagerbaer
Oct 14 '12 at 18:31
|
show 6 more comments
2
What about directory permissions?
– Karlson
Oct 13 '12 at 18:04
If you are in multiple groups, is your current group set to A?
– Code-Guru
Oct 13 '12 at 19:49
2
@Karlson, if directory permissions were the issue, you wouldn't be able to see the file's permissions in the first place.
– cjm
Oct 13 '12 at 22:02
Show us the full path and filename please.
– jippie
Oct 14 '12 at 9:13
It's in /home/theotheruser/somefolder/bla.txt I am in multiple groups.
– Lagerbaer
Oct 14 '12 at 18:31
2
2
What about directory permissions?
– Karlson
Oct 13 '12 at 18:04
What about directory permissions?
– Karlson
Oct 13 '12 at 18:04
If you are in multiple groups, is your current group set to A?
– Code-Guru
Oct 13 '12 at 19:49
If you are in multiple groups, is your current group set to A?
– Code-Guru
Oct 13 '12 at 19:49
2
2
@Karlson, if directory permissions were the issue, you wouldn't be able to see the file's permissions in the first place.
– cjm
Oct 13 '12 at 22:02
@Karlson, if directory permissions were the issue, you wouldn't be able to see the file's permissions in the first place.
– cjm
Oct 13 '12 at 22:02
Show us the full path and filename please.
– jippie
Oct 14 '12 at 9:13
Show us the full path and filename please.
– jippie
Oct 14 '12 at 9:13
It's in /home/theotheruser/somefolder/bla.txt I am in multiple groups.
– Lagerbaer
Oct 14 '12 at 18:31
It's in /home/theotheruser/somefolder/bla.txt I am in multiple groups.
– Lagerbaer
Oct 14 '12 at 18:31
|
show 6 more comments
4 Answers
4
active
oldest
votes
Have you logged out and logged back in again since you were added to group A ?
If not, your current login processes will only have the group memberships that it had at the time of login, not any changes since. And any child processes of that login will have the same group memberships (i.e. if you logged into X then every application including your terminal emulator and shell)
You can test this by logging in again on another console or via ssh, or something like exec sudo -u $(id -u -n) -i
(to effectively kill and replace the current shell with a new shell - any background processes belonging to that shell will be orphaned)
No, that wasn't the problem; I logged out and back in and that didn't resolve it.
– Lagerbaer
Oct 14 '12 at 18:37
add a comment |
With NFS, it depends which security mode you use, but in the traditional one, the list of groups the user belongs to is sent by the client to the server, and there's a limit on the number of groups that can be sent (it was 16 the last time I checked).
So, the client says: I'm uid 1234 and by the way I'm member of groups 12, 13, 14... If you're in more than 16 groups, that list will be truncated and there will be groups for which the server is not aware you're a member of it.
That's probably the explanation for it. Only the system administrator of the local and/or remote machine can do something about that either by changing the security model or the setting of the NFS server or by reducing the number of groups you're a member of.
I have a strong feeling that this is the reason, because the group I'm appears at position 19 in the output of the "groups" command. I'll show this answer to the sys admin and see if it helps. :)
– Lagerbaer
Oct 15 '12 at 16:21
How would you change the "security model" on NFS to solve this?
– Danny
Mar 28 '17 at 5:26
add a comment |
Could be ACLs. See
getfacl the-file
Could be that for some reason, the groups you're meant to be in is not properly set. Check with
id -a
What about
namei -xl "$(readlink -f the-file)"
getfattr -dm- the-file
sudo lsattr the-file
What's the type of the filesystem it resides in?
Any apparmor, SELinux or any other mandatory access control in place in the system?
You're sure the file doesn't contain the text "Permission denied", right ;-) ?
Nope, there's no special ACL, it just repeats what the standard flags tell me, and id -a tells me that I am in that file's group
– Lagerbaer
Oct 13 '12 at 17:56
The weird thing is, I can see the files of another user belonging to group B, of which I'm also a member...
– Lagerbaer
Oct 14 '12 at 18:38
File system appears to be nfs4. namei gives me / and home belonging to root, root. /home/username belonging to username and group X (of which I am not a member), then the rest is /home/username/path1/path2/file where path1 belongs to username and group X, and path2 belongs to username, and group A, of which I'm a member.
– Lagerbaer
Oct 15 '12 at 1:07
add a comment |
As you note in a comment, you don't have read permissions to /home/username
. But to read /home/username/path1/path2/file
, you need execute permissions for the whole path.
To debug this, run namei -l /home/username/path1/path2/file
as the user who reads the file.
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
Have you logged out and logged back in again since you were added to group A ?
If not, your current login processes will only have the group memberships that it had at the time of login, not any changes since. And any child processes of that login will have the same group memberships (i.e. if you logged into X then every application including your terminal emulator and shell)
You can test this by logging in again on another console or via ssh, or something like exec sudo -u $(id -u -n) -i
(to effectively kill and replace the current shell with a new shell - any background processes belonging to that shell will be orphaned)
No, that wasn't the problem; I logged out and back in and that didn't resolve it.
– Lagerbaer
Oct 14 '12 at 18:37
add a comment |
Have you logged out and logged back in again since you were added to group A ?
If not, your current login processes will only have the group memberships that it had at the time of login, not any changes since. And any child processes of that login will have the same group memberships (i.e. if you logged into X then every application including your terminal emulator and shell)
You can test this by logging in again on another console or via ssh, or something like exec sudo -u $(id -u -n) -i
(to effectively kill and replace the current shell with a new shell - any background processes belonging to that shell will be orphaned)
No, that wasn't the problem; I logged out and back in and that didn't resolve it.
– Lagerbaer
Oct 14 '12 at 18:37
add a comment |
Have you logged out and logged back in again since you were added to group A ?
If not, your current login processes will only have the group memberships that it had at the time of login, not any changes since. And any child processes of that login will have the same group memberships (i.e. if you logged into X then every application including your terminal emulator and shell)
You can test this by logging in again on another console or via ssh, or something like exec sudo -u $(id -u -n) -i
(to effectively kill and replace the current shell with a new shell - any background processes belonging to that shell will be orphaned)
Have you logged out and logged back in again since you were added to group A ?
If not, your current login processes will only have the group memberships that it had at the time of login, not any changes since. And any child processes of that login will have the same group memberships (i.e. if you logged into X then every application including your terminal emulator and shell)
You can test this by logging in again on another console or via ssh, or something like exec sudo -u $(id -u -n) -i
(to effectively kill and replace the current shell with a new shell - any background processes belonging to that shell will be orphaned)
answered Oct 13 '12 at 22:20
cascas
39.5k455103
39.5k455103
No, that wasn't the problem; I logged out and back in and that didn't resolve it.
– Lagerbaer
Oct 14 '12 at 18:37
add a comment |
No, that wasn't the problem; I logged out and back in and that didn't resolve it.
– Lagerbaer
Oct 14 '12 at 18:37
No, that wasn't the problem; I logged out and back in and that didn't resolve it.
– Lagerbaer
Oct 14 '12 at 18:37
No, that wasn't the problem; I logged out and back in and that didn't resolve it.
– Lagerbaer
Oct 14 '12 at 18:37
add a comment |
With NFS, it depends which security mode you use, but in the traditional one, the list of groups the user belongs to is sent by the client to the server, and there's a limit on the number of groups that can be sent (it was 16 the last time I checked).
So, the client says: I'm uid 1234 and by the way I'm member of groups 12, 13, 14... If you're in more than 16 groups, that list will be truncated and there will be groups for which the server is not aware you're a member of it.
That's probably the explanation for it. Only the system administrator of the local and/or remote machine can do something about that either by changing the security model or the setting of the NFS server or by reducing the number of groups you're a member of.
I have a strong feeling that this is the reason, because the group I'm appears at position 19 in the output of the "groups" command. I'll show this answer to the sys admin and see if it helps. :)
– Lagerbaer
Oct 15 '12 at 16:21
How would you change the "security model" on NFS to solve this?
– Danny
Mar 28 '17 at 5:26
add a comment |
With NFS, it depends which security mode you use, but in the traditional one, the list of groups the user belongs to is sent by the client to the server, and there's a limit on the number of groups that can be sent (it was 16 the last time I checked).
So, the client says: I'm uid 1234 and by the way I'm member of groups 12, 13, 14... If you're in more than 16 groups, that list will be truncated and there will be groups for which the server is not aware you're a member of it.
That's probably the explanation for it. Only the system administrator of the local and/or remote machine can do something about that either by changing the security model or the setting of the NFS server or by reducing the number of groups you're a member of.
I have a strong feeling that this is the reason, because the group I'm appears at position 19 in the output of the "groups" command. I'll show this answer to the sys admin and see if it helps. :)
– Lagerbaer
Oct 15 '12 at 16:21
How would you change the "security model" on NFS to solve this?
– Danny
Mar 28 '17 at 5:26
add a comment |
With NFS, it depends which security mode you use, but in the traditional one, the list of groups the user belongs to is sent by the client to the server, and there's a limit on the number of groups that can be sent (it was 16 the last time I checked).
So, the client says: I'm uid 1234 and by the way I'm member of groups 12, 13, 14... If you're in more than 16 groups, that list will be truncated and there will be groups for which the server is not aware you're a member of it.
That's probably the explanation for it. Only the system administrator of the local and/or remote machine can do something about that either by changing the security model or the setting of the NFS server or by reducing the number of groups you're a member of.
With NFS, it depends which security mode you use, but in the traditional one, the list of groups the user belongs to is sent by the client to the server, and there's a limit on the number of groups that can be sent (it was 16 the last time I checked).
So, the client says: I'm uid 1234 and by the way I'm member of groups 12, 13, 14... If you're in more than 16 groups, that list will be truncated and there will be groups for which the server is not aware you're a member of it.
That's probably the explanation for it. Only the system administrator of the local and/or remote machine can do something about that either by changing the security model or the setting of the NFS server or by reducing the number of groups you're a member of.
answered Oct 15 '12 at 8:41
Stéphane ChazelasStéphane Chazelas
311k57587945
311k57587945
I have a strong feeling that this is the reason, because the group I'm appears at position 19 in the output of the "groups" command. I'll show this answer to the sys admin and see if it helps. :)
– Lagerbaer
Oct 15 '12 at 16:21
How would you change the "security model" on NFS to solve this?
– Danny
Mar 28 '17 at 5:26
add a comment |
I have a strong feeling that this is the reason, because the group I'm appears at position 19 in the output of the "groups" command. I'll show this answer to the sys admin and see if it helps. :)
– Lagerbaer
Oct 15 '12 at 16:21
How would you change the "security model" on NFS to solve this?
– Danny
Mar 28 '17 at 5:26
I have a strong feeling that this is the reason, because the group I'm appears at position 19 in the output of the "groups" command. I'll show this answer to the sys admin and see if it helps. :)
– Lagerbaer
Oct 15 '12 at 16:21
I have a strong feeling that this is the reason, because the group I'm appears at position 19 in the output of the "groups" command. I'll show this answer to the sys admin and see if it helps. :)
– Lagerbaer
Oct 15 '12 at 16:21
How would you change the "security model" on NFS to solve this?
– Danny
Mar 28 '17 at 5:26
How would you change the "security model" on NFS to solve this?
– Danny
Mar 28 '17 at 5:26
add a comment |
Could be ACLs. See
getfacl the-file
Could be that for some reason, the groups you're meant to be in is not properly set. Check with
id -a
What about
namei -xl "$(readlink -f the-file)"
getfattr -dm- the-file
sudo lsattr the-file
What's the type of the filesystem it resides in?
Any apparmor, SELinux or any other mandatory access control in place in the system?
You're sure the file doesn't contain the text "Permission denied", right ;-) ?
Nope, there's no special ACL, it just repeats what the standard flags tell me, and id -a tells me that I am in that file's group
– Lagerbaer
Oct 13 '12 at 17:56
The weird thing is, I can see the files of another user belonging to group B, of which I'm also a member...
– Lagerbaer
Oct 14 '12 at 18:38
File system appears to be nfs4. namei gives me / and home belonging to root, root. /home/username belonging to username and group X (of which I am not a member), then the rest is /home/username/path1/path2/file where path1 belongs to username and group X, and path2 belongs to username, and group A, of which I'm a member.
– Lagerbaer
Oct 15 '12 at 1:07
add a comment |
Could be ACLs. See
getfacl the-file
Could be that for some reason, the groups you're meant to be in is not properly set. Check with
id -a
What about
namei -xl "$(readlink -f the-file)"
getfattr -dm- the-file
sudo lsattr the-file
What's the type of the filesystem it resides in?
Any apparmor, SELinux or any other mandatory access control in place in the system?
You're sure the file doesn't contain the text "Permission denied", right ;-) ?
Nope, there's no special ACL, it just repeats what the standard flags tell me, and id -a tells me that I am in that file's group
– Lagerbaer
Oct 13 '12 at 17:56
The weird thing is, I can see the files of another user belonging to group B, of which I'm also a member...
– Lagerbaer
Oct 14 '12 at 18:38
File system appears to be nfs4. namei gives me / and home belonging to root, root. /home/username belonging to username and group X (of which I am not a member), then the rest is /home/username/path1/path2/file where path1 belongs to username and group X, and path2 belongs to username, and group A, of which I'm a member.
– Lagerbaer
Oct 15 '12 at 1:07
add a comment |
Could be ACLs. See
getfacl the-file
Could be that for some reason, the groups you're meant to be in is not properly set. Check with
id -a
What about
namei -xl "$(readlink -f the-file)"
getfattr -dm- the-file
sudo lsattr the-file
What's the type of the filesystem it resides in?
Any apparmor, SELinux or any other mandatory access control in place in the system?
You're sure the file doesn't contain the text "Permission denied", right ;-) ?
Could be ACLs. See
getfacl the-file
Could be that for some reason, the groups you're meant to be in is not properly set. Check with
id -a
What about
namei -xl "$(readlink -f the-file)"
getfattr -dm- the-file
sudo lsattr the-file
What's the type of the filesystem it resides in?
Any apparmor, SELinux or any other mandatory access control in place in the system?
You're sure the file doesn't contain the text "Permission denied", right ;-) ?
edited Oct 14 '12 at 19:53
answered Oct 13 '12 at 17:44
Stéphane ChazelasStéphane Chazelas
311k57587945
311k57587945
Nope, there's no special ACL, it just repeats what the standard flags tell me, and id -a tells me that I am in that file's group
– Lagerbaer
Oct 13 '12 at 17:56
The weird thing is, I can see the files of another user belonging to group B, of which I'm also a member...
– Lagerbaer
Oct 14 '12 at 18:38
File system appears to be nfs4. namei gives me / and home belonging to root, root. /home/username belonging to username and group X (of which I am not a member), then the rest is /home/username/path1/path2/file where path1 belongs to username and group X, and path2 belongs to username, and group A, of which I'm a member.
– Lagerbaer
Oct 15 '12 at 1:07
add a comment |
Nope, there's no special ACL, it just repeats what the standard flags tell me, and id -a tells me that I am in that file's group
– Lagerbaer
Oct 13 '12 at 17:56
The weird thing is, I can see the files of another user belonging to group B, of which I'm also a member...
– Lagerbaer
Oct 14 '12 at 18:38
File system appears to be nfs4. namei gives me / and home belonging to root, root. /home/username belonging to username and group X (of which I am not a member), then the rest is /home/username/path1/path2/file where path1 belongs to username and group X, and path2 belongs to username, and group A, of which I'm a member.
– Lagerbaer
Oct 15 '12 at 1:07
Nope, there's no special ACL, it just repeats what the standard flags tell me, and id -a tells me that I am in that file's group
– Lagerbaer
Oct 13 '12 at 17:56
Nope, there's no special ACL, it just repeats what the standard flags tell me, and id -a tells me that I am in that file's group
– Lagerbaer
Oct 13 '12 at 17:56
The weird thing is, I can see the files of another user belonging to group B, of which I'm also a member...
– Lagerbaer
Oct 14 '12 at 18:38
The weird thing is, I can see the files of another user belonging to group B, of which I'm also a member...
– Lagerbaer
Oct 14 '12 at 18:38
File system appears to be nfs4. namei gives me / and home belonging to root, root. /home/username belonging to username and group X (of which I am not a member), then the rest is /home/username/path1/path2/file where path1 belongs to username and group X, and path2 belongs to username, and group A, of which I'm a member.
– Lagerbaer
Oct 15 '12 at 1:07
File system appears to be nfs4. namei gives me / and home belonging to root, root. /home/username belonging to username and group X (of which I am not a member), then the rest is /home/username/path1/path2/file where path1 belongs to username and group X, and path2 belongs to username, and group A, of which I'm a member.
– Lagerbaer
Oct 15 '12 at 1:07
add a comment |
As you note in a comment, you don't have read permissions to /home/username
. But to read /home/username/path1/path2/file
, you need execute permissions for the whole path.
To debug this, run namei -l /home/username/path1/path2/file
as the user who reads the file.
add a comment |
As you note in a comment, you don't have read permissions to /home/username
. But to read /home/username/path1/path2/file
, you need execute permissions for the whole path.
To debug this, run namei -l /home/username/path1/path2/file
as the user who reads the file.
add a comment |
As you note in a comment, you don't have read permissions to /home/username
. But to read /home/username/path1/path2/file
, you need execute permissions for the whole path.
To debug this, run namei -l /home/username/path1/path2/file
as the user who reads the file.
As you note in a comment, you don't have read permissions to /home/username
. But to read /home/username/path1/path2/file
, you need execute permissions for the whole path.
To debug this, run namei -l /home/username/path1/path2/file
as the user who reads the file.
answered yesterday
Adam TrhonAdam Trhon
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-files, group, nfs, permissions
2
What about directory permissions?
– Karlson
Oct 13 '12 at 18:04
If you are in multiple groups, is your current group set to A?
– Code-Guru
Oct 13 '12 at 19:49
2
@Karlson, if directory permissions were the issue, you wouldn't be able to see the file's permissions in the first place.
– cjm
Oct 13 '12 at 22:02
Show us the full path and filename please.
– jippie
Oct 14 '12 at 9:13
It's in /home/theotheruser/somefolder/bla.txt I am in multiple groups.
– Lagerbaer
Oct 14 '12 at 18:31