Permissions are the unix way of controlling access to resources such as files, directories and devices and may be specified for an owner, group, or all users.
2
votes
1answer
24 views
Permissions on an ext4 filesystem on a removable drive used in different machines
I have a USB flash drive with ext4 file system and its files are owned by my user on my local machine, for example by myuser@myhost with 700 permissions.
If I unplug my flash drive and plug it in ...
2
votes
1answer
34 views
scp to /home changes permissions?
This would be illustrated very nicely with an scheme. When I write "Test: OK" or "Test: FAIL" I am restarting apache server (httpd service). Basically, performing everything as root in the ...
1
vote
3answers
29 views
How do file permissions/attributes work? Kernel-level, FS-level or both?
A question that occurred to me earlier: are file permissions/attributes OS- (and therefore kernel-) dependent or are they filesystem-dependent?
It seems to me that the second alternative is the more ...
0
votes
2answers
31 views
Base permissions on a fat32 usb drive
On linux, the base permissions for directories is 777 and for files, it is 666. Thus, with umask=022, new files are 644 and new directories are 755.
But when I mount a usb drive with fat32 ...
3
votes
4answers
112 views
chmod recursive permission on thousands of files
This is a more general question about 'chmoding' recursively.
I have this script which at some point needs to change the permissions recursively in a folder which has a few hundred thousand files.
...
1
vote
1answer
22 views
What are the settings to correct vsftpd “500 OOPS: cannot change directory” error?
My question is what settings do I need to change and/or commands to run to allow me to log into my vsftpd system?
I am getting this error, when I login using ftp instead of sftp:
Name ...
1
vote
1answer
14 views
Make web project writable by apache and other user
I am running ubuntu 12.04 LTS . To be able to view my web project in the browser I did the following:
chown -R www-data:www-data /var/www/project
Now I wanted to open the project in netbeans but it ...
3
votes
1answer
18 views
Procmail: Denying special privileges for “/etc/procmailrcs/default.rc”
I'm trying to setup postfix, dovecot and procmail to work together with virtual users. In the end I want to have virtual users and the possibility to add rules to sort incoming rules. For the last ...
9
votes
3answers
297 views
How does the sticky bit work?
SUID
The sticky bit applied to executable programs flagging the system to keep an image of the program in memory after the program finished running.
But I don't know that what it's stored in ...
1
vote
1answer
36 views
Filesystem suddenly read-only?
I've been storing some files on a MicroSD formatted to ext4 that I connect via USB. I tried to move a directory in it to an external hard drive, and I got mv: error reading ...
3
votes
5answers
88 views
Protect folder from sudoers
Is there an ability to not allow sudoers view your folder (only you and root can access folder)?
2
votes
2answers
45 views
Having Virtualbox disk images on /opt
Background
After a recent HDD crash I did a clean install of Linux Mint 15 on a new disk. Seeing the potential problems with having backups of my documents and eclipse workspace, I realized that a ...
3
votes
2answers
62 views
How Do I Block Read Access to a Symbolic Link?
I have this file structure:
> APPLICATION 1
>> CONTROLLER (@JuniorProgrammers)
>> MODELS (symlink to SHARED/MODELS)
>> VIEWS (@Designers)
> APPLICATION 2
>> CONTROLLER ...
1
vote
1answer
26 views
Can't edit /proc/sys/net/core/wmem_max [duplicate]
Recently my wireless network has being stopping to transfer data from some irregular time intervals that vary from 30 seconds to 20 minutes, and every time I need to plug off and then on the wireless ...
3
votes
0answers
23 views
Richacl invalid argument when trying to set atributes
i've compiled a kernel to use richacls, and compiled the richacl's utility, (but not the e2fsprogs). I've mounted a loop file with richacl flags
/root/fs_prueba_10mb on /media/ext4_con_richacl type ...
3
votes
2answers
64 views
Permissions by path instead of file mode bits
I often find that the unix way of handling file permissions is powerful, particularly when combined with ACLs, but rather difficult to handle. Setting file modes, group ownership and extended ...
2
votes
1answer
24 views
umask base permissions on usb drive [duplicate]
On linux, the base permission for a file is 666 and for directories, it is 777. With a umask=022, new files and directories have permissions 644 and 755 respectively.
When I mount a usb drive with ...
1
vote
1answer
49 views
I can't seem to remove a file even after changing ownership and permissions [duplicate]
Haven't been here much. Mostly Stackoverflow. Anyway, I have a file that I can't remove.
I tried sudo rm files.db and got
Operation not permitted
Did sudo chown me: files.db
Then sudo chmod 777 ...
1
vote
1answer
45 views
Changed file access to read only but I can still write to the file. Why?
I am running a small embedded system built using buildroot. I have come across this strange behaviour when trying to set up my file permissions on the target device. To illustrate what confuses me I ...
0
votes
1answer
44 views
Give a Root owned folder web read and write access
I have an Ubuntu server for a client I am working on, doing development work. I have root access and they created a new vhost blog.domain.com so when I log into it with WinSCP it list the files and ...
3
votes
2answers
57 views
Allow a specific user or group root access without password to /bin/date
As the title would suggest, I'd like to give a user or group full root access to the /bin/date command, including any manner of arguments as defined in the man pages.
I understand /etc/sudoers ...
2
votes
2answers
100 views
Prevent creating directories but allow creating files
I have a directory shared through Samba. I want users to be able to create/modify/delete files but not create/erase directories. I haven't found a way to do it. Maybe with SELinux? But how?
4
votes
4answers
197 views
Making a directory protected from 'rm -rf'
I just lost some data in folder A which was inside folder B after doing rm -rf B. Before I could realize what have I done, it was all over. Now a lesson is learnt, I wish to make some of my folder ...
23
votes
3answers
2k views
How to recover from a chmod 000 /bin ?
And now I am unable to chmod it back.. or use any of my other system programs. Luckily this is on a VM I've been toying with, but is there any way to resolve this? The system is Ubuntu Server 12.10.
...
1
vote
1answer
41 views
Changing permissions on an NFS mount + sharing directories with a guest VM
I'm building a development environment where folders from a host environment (OSX) are mounted in VirtualBox VMs running Ubuntu guests.
Our experience is that straightforward VirtualBox shared ...
4
votes
2answers
114 views
Why cannot find read /run/user/1000/gvfs even though it is running as root?
Can someone tell me what I'm doing wrong, what this is, or how to fix it? I'm running Fedora 18 and getting the error shown
[root@servername /]# find . -name ngirc
find: `./run/user/1000/gvfs': ...
1
vote
1answer
32 views
Is it a good practice to use svn for two different applications but on the same server?
Is it a good practice to use SVN for two different applications but on the same server ?
I'm asking this because, whenever I update one of the application with svn it does not ask for password ...
0
votes
4answers
154 views
USB 500GB external drive mounted with undetermined permissions, missing data
Note: This situation is evolving. Please see the output at the end of this question for the current situation.
I'm using Linux Mint 14. Recently, I repartitioned one of my hard drives, and I backed ...
1
vote
0answers
19 views
How to make a directory public and private in a single bucket
I am using amazon S3 bucket to store my data in two different directories in single bucket, I want that my one directory should be globally accessible and another directory should be private. Is there ...
-1
votes
0answers
59 views
/tmp permission denied [closed]
I'm trying to install CrossOver and I keep getting this:
/home/mike/install-crossover-12.2.1.bin: line 154: /tmp/installer.Gxlnvhb1lf: Permission denied
and ls -ld /tmp outputs
drwxrwxrwt 16 root ...
1
vote
2answers
39 views
Cannot remove /log/var/snort as root
I am using Ubuntu 11.10 Gnome.
I uninstalled snort in order to install a more recent version. The new installation initially failed because the system would not let be rm or modify /var/log/snort ...
4
votes
3answers
81 views
Cannot write to file with write permission
I have this file:
$ ls -lrta ~/.bash_profile
-rwxr-x---. 1 xxx xxx 904 May 23 15:36 /home/xxx/.bash_profile
$
I am the owner of the file and I have write permission.
When I try to edit (delete the ...
0
votes
1answer
40 views
Not able to remove a file [duplicate]
file name : abc
permissions : -rwxrwxrwx
shell : ksh
I am logged with the user which is the owner of this file.
Contents of file
AccessTime = 20130424-161120 ActualShmKeyDec = 1090650862 ...
3
votes
3answers
52 views
What is a process GID and what purpose does it serve?
Reading mod_wsgi's documentation I found you can choose which group to run the worker processes as.
I can understand group ownership of files and how only a user who belongs to that group can achieve ...
-1
votes
1answer
38 views
disabling root permissions [closed]
From Linux From Scratch build a minimal system for running my application. but struck on disabling root permission.
Need my minimal lfs as ubuntu.
when ubuntu boots login-screen displays when we ...
1
vote
4answers
72 views
What type of permissions should a user's home directory and files have?
I'm working with a fresh install of Ubuntu 12.04 and I've just added a new user:
useradd -m testuser
I thought that the -m flag to create a home directory for users was pretty standard, but now ...
1
vote
1answer
121 views
Xfce: Upgrade from Squeeze to Wheezy broke xfce's user policies
While using Debian squeeze, I was able to allow a user shutdown in xfce by adding users to the powerdev group (see here: xfce: Allow shutdown for non-root users).
Now, I upgraded my system to Debian ...
1
vote
3answers
92 views
Setting file permissions in bash script
This script is not working the way I thought it would .I though it would find all the scripts that have every one rwx permissions changed to the permissions of xx5
#!/bin/bash
# the / makes find ...
1
vote
1answer
46 views
Give default write permission to group to any newly created files and folders
Let's say that we have 2 users: a and b, that are both part of group general.
I would like that any file or folder that A creates, would have write permission to the group GENERAL.
How can I do it?
...
1
vote
0answers
48 views
vsftpd virtual user read permissions
I have a vsftp server that services a read-only public space by anonymous login. It works fine. I need to add a few specific users that will authenticate by username/password and they will have ...
2
votes
2answers
70 views
Can I allow users to chmod a file not owned by them?
I would like to allow users to chmod a file that is owned by root or some user that is not themselves. I have chmod'ed the file to 777 and I get "operation not permitted". I have added the user to the ...
1
vote
2answers
38 views
Is there any way for group “owners” to have full rights of a file or directory owner?
Is it possible with the normal Unix permissions system to enable group members to have the right to change a file's permissions?
In other words, suppose we have a file awesome.rb which is owned by ...
3
votes
1answer
110 views
ACL, ls, “permission denied” and a lot of questionmarks
I have two users, Alice and Bob. Bob should be allowed to list, ls, Alice's home directory. Alice also has a file in her home directory that Bob should also be allowed to read.
I run these commands ...
0
votes
2answers
60 views
why am I able to delete file which belongs to `root` under a non-root user? [duplicate]
I create a file under my user esolve
and then su root
and use chown to change its user to root
then I returned to user esolve
I notice I can still delete the file with rm
why?
2
votes
1answer
63 views
how to keep file owner same for newly created files
This question is regarding samba file access.
I have created a folder A, and under folder A created two folders B and C. And also created three users A, B and C.
User A has access to all three ...
2
votes
1answer
43 views
Adding a user to a group by default
I have a group that all users on the system share. The group name is common and it is to allow for a universal fileshare for everyone on the machine. How would I make it so that all new users are ...
2
votes
2answers
51 views
how to initialize `/etc/group`?
After editing /etc/group, How this update starts functioning without restarting the system in Unix?
Is there any command we need to run?
2
votes
3answers
91 views
files in /proc/$PID (e.g. ssh-agent, Chrome) are not owned by user but by root
I am just answering another question here :-) and thus had a look – wanted to have a look at /proc/$PID/fd of ssh-agent in order to find out which socket it uses. But I can't. I am quite surprised to ...
1
vote
1answer
82 views
LAMP Server setup for personal development
I am setting up a LAMP server in VirtualBox for personal development. This will be an Ubuntu Server 12.04 install, and I will be using Virtual Hosts for Drupal, Yii, and other small PHP apps. Ideally ...
0
votes
0answers
42 views
Why can't users besides root create files in a samba share?
I am sharing a directory on one Red Hat machine via samba, and mounting it on another Red Hat machine with the following command:
mount -t cifs -o guest <remotepath> <localpath>
The ...
