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.

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Recovering from “chmod -R 777 /” in Ubuntu [duplicate]

Possible Duplicate: Wrongly set chmod / 777. Problems? I am using Ubuntu for development purposes. As I work on the database side, there are a lot of things which require file permissions ...
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1answer
218 views

Cannot execute files on another partition

On my system I have three partitions: one is shared between W7 and Linux Mint (NTFS), and the other two are OS-specific. In my home directory I have created a symbolic link to another directory on ...
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1answer
5k views

How can I make a shared directory accessible by SFTP?

I have set up an sftp account in /home/sam, created a group sftp, and added the user sam in it. i gave chown sam:sftp /home/sam for the user to perform operations in that directory. Now I have ...
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3answers
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su: Permission denied despite correct password

In my new Gentoo installation, su doesn't work as my non-root user: After entering the correct password I get the message "su: Permission denied". What could be causing this? I have already tried ...
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1answer
403 views

Giving non-admin users permissions ( to update, to access new wifi, but block DVD writing) in Ubuntu 12.04

Is there a way I can give a non sudoer the permissions necessary for them to update the system through Update Manager? I don't want the user to be able to apt-get install whatever like however, just ...
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1answer
460 views

The relationship between execute permission on a directory and its inode structure

My question deals with the relationship between the read and execute bits on a directory. I'm going to give my assumptions, first, all according to my current knowledge, then ask my question in bold ...
3
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1answer
491 views

What does it mean if a directory has only x (executable) permission for certain user/group?

I stumbled across the directory /etc/ssl/private on Ubuntu (12.04), it has following permission: drwx--x--- 2 root ssl-cert 4096 7月 8 2012 private/ I wonder what does this mean for group ...
3
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1answer
178 views

Change who is able to chmod

Is there a way to change who can chmod (change the permissions of) a particular file? It is only the owner of the file (without sudo-ing it), if my experimentation has been correct? But what I want ...
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0answers
51 views

Root user can't do everything? [duplicate]

Possible Duplicate: Redirecting stdout to a file you don’t have write permission on I'm quite new to Linux and I have a permissions questions. I'm using Linux Mint. If I go to /opt and do ...
2
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1answer
111 views

Standard way to expose device file to userland applications running on an unprivileged user account?

I just finished the first version of a Linux kernel module I've written in C. The module creates a device file (/dev/wn0) that controls a USB device with three LED lights. For example, running as ...
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2answers
693 views

“~/” receives a permission denied error in Csh

Running in Csh when using Tilde Notation performing a ~/ at the command line, I receive a "Permission denied." error. This directory is owned by the user performing the command and has the ...
4
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1answer
727 views

CentOS file owner changed on editing

I have the following problem. On Unix server (CentOS 5.5) a number of users belonging to the same group have access to the same files (via ssh). After one particular user (let's say usera A) has ...
4
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1answer
759 views

Clear setuid permission using numeric mode

On an Ubuntu Linux I have a directory with the setuid bit set (drwsr-xr-x) which I want to unset. Neither chmod 755 nor chmod 0755 nor chmod 00755 (I though maybe the first 0 is interpreted as just ...
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1answer
131 views

Permission rights on automatic directories inside /media

I got a permission denied when I am trying to cd inside a directory. I could chown it for my user, however I'm wondering if the problem is elsewhere: The directory in question is an automatic ...
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2answers
187 views

Make a programme executable by common users

I've installed hddtemp on my Arch Linux, but it needs to be run with root permissions. I want to execute it as a normal user without using sudo. How can I do this?
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2answers
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Force the owner and group for the contents of a tar file?

I would like to create a tar file with contents belonging to an owner:group pair who do not exist on the system from which the file is being made. Here's the direction I've tried: tar ca ...
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0answers
189 views

vsftpd on Ubuntu not obeying filesystem permissions

I'm trying to set an FTP upload to a web root on Ubuntu 12.04 using vsftp. The user has a local account, username_ftp. I changed their home to their web root in /etc/passwd. ...
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1answer
486 views

Group permissions ineffective, permission still denied

I've got a problem with UNIX permissions : I'm working under Debian Squeeze, and one of my scripts, run by www-data, needs to move a file, 23550.zip, placed in the home directory of another user, ...
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1answer
222 views

security concern around adding cron user to web application group

I have a permissions issue on my CentOS 5.6 machine with regards to the cron user. On my test/staging environment my cron user (picco-cron) is a member of one group - picco-cron, as below: ...
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2answers
1k views

How to handle user permission issue?

We have created an asset management application web app using php. This app allows users to browse, upload, rename, replace assets (binary files like images and 3d models) We developed in windows ...
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1answer
8k views

“Error: permission denied” error from Transmission Client

When I try downloading files with Transmission I get: I've tried searching for this problem, and everyone always says to set permissions correctly, but I've done that: This is running on a ...
3
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1answer
4k views

how to remove quarantine from file permissions in os x

I downloaded a .pem file and my Mac OS X (10.8.2) added an @ sign at the end of the file permissions. This is causing file permission issues. I can't seem to remove the quarantine flag. I even tried ...
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2answers
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Restrict file access to append only

I have a directory with log files and I'm putting logs from script launched by users into them. Logging with syslog doesn't seem possible in this case. (non-daemon rsync) I want the users to have ...
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3answers
1k views

Is it impossible to run as `root` if the machine isn't rooted?

By default, the user of the device does not have access to certain root objects (e.g. the /data directory). Even though these objects are off-limits, however, it would seem to me that these objects ...
6
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1answer
957 views

`kill -s TERM` works, `kill -s ABRT` gets “Operation not permitted”

There is a process that I own whose documentation claims I can send SIGABRT to in order to get some debugging information. However, when I try to send SIGABRT, I get back "Operation not permitted". I ...
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1answer
3k views

how to allow different users of same group access/edit files/directories created a user of same group

here is my example, here I am logged in as root created a group using groupadd command called as devel. created two users dev1 and dev2 using useradd command. useradd -g devel dev1 useradd -g devel ...
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2answers
865 views

Why do I have to use sh to execute scripts from CD/DVD media?

I hit again on this strange behaviour of the system. I'm running Debian 6.0.6 and had quite some troubles executing a script directly from CD/DVD. Finally I had to use: sh /media/cdrom/command to ...
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2answers
756 views

pmount not working on Debian wheezy

"Not working" might be slightly inaccurate, since it still seems to mount and umount things properly, but it's inaccessible to users other than the root user, which defeats the purpose entirely. ...
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2answers
736 views

Changing permissions for files in linux

I have started using Linux recently for development of a project and currently facing some issues with file permissions in the directories. I have some libraries .so files that I need to access from ...
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2answers
13k views

What does the 'd' mean in ls -al results and what is that slot called? [duplicate]

In Linux, what does the d mean in the first position of drwxr-xr-x? And what are all of the possible letters that could be there, and what do they mean? I'm trying to learn more about the Linux file ...
8
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0answers
797 views

How do I let an SDL app (not running as root) use the console

I want to use an SDL-based program to display graphics on the console, without having to log on from the console, and without running the program as root. For example, I want to be able to run it via ...
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2answers
170 views

Problem accessing /home from different partition

I'm currently using Chakra on /sda1 and Fuduntu on /sda2 (a partition I keep for trying out and playing around with distros), and both systems use /sda3 for each different /home partition (I'll call ...
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3answers
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How does vim steal root owned files?

Witness the following: sh-3.2$ mkdir testcase sh-3.2$ cd testcase sh-3.2$ sudo touch temp sh-3.2$ ls -al total 0 drwxr-xr-x 3 glen staff 102 19 Dec 12:38 . drwxr-xr-x 12 glen staff 408 19 Dec ...
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1answer
2k views

Remove noexec from Home folder

I trying to deploy an rails application into /home/app/myapp, but when application tries to connect to Mysql, I get this error: ** [out :: 192.168.110.50] ...
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1answer
416 views

Can I export an NFS share with faked root privileges

I'm writing software for an embedded linux system and I'm using an NFS share as root directory. The root filesystem resides in /srv/nfs/rootfs, and it is exported using the following /etc/exports: ...
2
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2answers
3k views

How to allow www-data to create a folder without giving read access to the parent folder

I'm not exactly sure the right question to ask, so I'll try to explain what I'm trying to do. I have an internal web application (in PHP) that I want to be able to create a folder. The trouble is ...
3
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1answer
199 views

How to display the permissions of a new file in the status line of the Vim editor?

With the following piece of code I get the permissions for an existing file: augroup Get_file_perm autocmd! autocmd BufWinEnter,FileChangedShell * let w:file_perm=getfperm(expand('%:p')) augroup ...
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4answers
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umask is not working for directories

I have an odd problem with umask. My current setting is: $ umask 0022 $ umask -S u=rwx,g=rx,o=rx This only works for files though and not directories: $ touch abc $ ll abc 0 -rw-rw-rw- 1 user1 ...
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1answer
153 views

Don't have write permission in partition

In my PC I have installs Windows7 and then Ubuntu as OSes. When I try to access other partitions ( E: and F: which I'm using from Winsows7 OS) it get mount without any issue and can read and modify ...
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2answers
660 views

compiling with gcc broken for users but fine for root

So somewhere along the way compiling as a regular user has stopped working on my server. I'm on Debian Stable. Can't think what has changed on my system that would result in this, or how to fix it, ...
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votes
2answers
1k views

Moving a root directory to a separate partition

I'd like to create a new partition and move the contents of the /var directory to it for the security reason of having /var/www and other subdirectories "mounted" with nosuid, noexec, and nodev ...
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1answer
422 views

File permission mechanism in Unix like systems

Can some one please explain with a an example the file permission mechanism in Linux and other Unix like systems ? What are the nine bits for ? Why do we have a group id for a user as well as for a ...
2
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3answers
302 views

I can not remove folder from server

Accidentall I created the folder on remotely server (Server OS is Linux) using php: mkdir("folder_name",0); Now I can not delete this folder from server. I think this is from permission, because 0 is ...
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2answers
358 views

Run program with additional supplementary group

I am looking for something like sudo (or something that can be run from sudo) that allows me to run a program with my uid and primary gid, but with an additional supplementary group.
0
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2answers
139 views

Change/Create permissions for a folder

How can I create (if the folder is new) or change (if the folder was already existent) permissions for a folder? In particular, I want to create a subdirectory in /etc/bind/ where I can put the ...
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1answer
1k views

add members of wheel group, sudo access

On Fedora15, following this wiki, I added a user to wheel group, which is already in the sudoer config file. but still I get not-a-sudoer error prompt. Should I specifically name every member of a ...
2
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2answers
766 views

Pre-defined umask under a given path [duplicate]

Possible Duplicate: How to set default file permissions for all folders/files in a directory? Say I have default umask, umask1. I would like all files/folders that I create/modify under a ...
1
vote
1answer
236 views

Accidentally set /lib permissions to 644

Long story short, I've got an Ubuntu server box that was recently compromised (I believe through a known exploit of an older version of Tomcat, which has already been updated). Part of the exploit ...
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1answer
692 views

Transmission client can't access mounted NFS share

I set up transmission-daemon on my Scientific Linux 6.3 machine to download files to a mounted NFS share (mounted during boot via /etc/fstab). The directory that the NFS share is mounted to was ...
3
votes
2answers
563 views

Linux isn't sure whether a file exists or not [duplicate]

Possible Duplicate: Getting “Not found” message when running a 32-bit binary on a 64-bit system ts3user@...:~/ts3$ dir CHANGELOG LICENSE doc ... ts3server.pid ts3server_linux_x86 ...