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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Clarify File Permissions

I've been searching for information about file/directory permissions, and I keep finding the same basic principles. What I can't find anywhere is a rationale for determining what permissions to give ...
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1answer
922 views

Problem opening .dvi files

I would like to know why my Lubuntu 11.10 does not open my .dvi files created with Latex. Please, can anybody help me solve this problem? When I use evince L1.dvi, in the terminal, the evince ...
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2answers
6k views

Allowing write access to an SMB mounted drive

Following this guide I was able to get my Samba share to mount on my Ubuntu 12.04 system. I can navigate the folders just fine. However I cannot create a directory nor create a file. I get the ...
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1answer
2k views

Can't rename a directory that I own

I have a directory with a big load of sub directories. I own all of them, and the permissions are all 777. pascal@azazel /box $ ls -al total 147872 drwxr-xr-x 293 root root 12288 aoû 22 19:44 ...
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0answers
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Windows domain account can't create files via samba share, but can do this in linux shell, why?

I'm migrating tomcat server from windows to linux (CentOS 6.3 64bit), and want to use samba to share tomcat directory to technical department staffs (windows domain users) with read+write rights. ...
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1answer
801 views

Correct owner, group and permissions when mounting an image file

Suppose I have an image home.img of a home partition of another linux machine (B). On that machine there is a users userB and there is a special group, groupB. Consider for example a file fileB in the ...
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1answer
612 views

Group Permission on public_html [duplicate]

Possible Duplicate: Permissions: What's the right way to give Apache more user permissions? Before I knew better, I used /home/someuser/public_html/scripts as a place from which shared ...
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4answers
3k views

Best way to make encrypted backups while preserving permissions to a windows file system

For my home network I wanted to buy a NAS which supports disk encryption and NFS since it is important for me that the backup is encrypted but also that it preserves owner, groups and permissions ...
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1answer
7k views

Why this error: “cannot create directory `foo': Permission denied”

I get this error when I try creating a directory: [rex <03:57 PM> /var/tmp/pb82]$ mkdir foo mkdir: cannot create directory `foo': Permission denied But doesn't the following output indicate ...
0
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1answer
821 views

Prevent directory permission change (or cronjob to work around)

I have a HostGator dedicated server running CentOS. I have a folder on one user's account where I want all users to be able to have read access, so we keep it chmod'd to 755. HG has a script that runs ...
5
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2answers
4k views

List all chflags file flags?

Is there a way to see a file's flags, such as hidden, schg, etc? I've got an rwxrwxrwx file that I can't edit, and I think a flag might be responsible.
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1answer
2k views

How to configure permissions to allow apache to securely have access to a file in a shared environment?

This is a follow up question from my previous, but I felt it might be more Linux based. http://serverfault.com/questions/414207/how-to-set-linux-permissions-to-allow-apache-to-have-access-to-a-file ...
4
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1answer
3k views

GNU Screen does not work when su'ing from root to a normal user

Is it normal, that when I am logged in as root, and the used su user, I can't access that users screen sessions? In this case, screen complains about it not having permissions on /dev/pts/x. I ...
5
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1answer
961 views

Change view in emacs dired mode

What options are there to change the view of a directory in emacs dired mode? How to apply it? How can I change it on the fly? In particular I want to know: How to make it show the file sizes in ...
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3answers
1k views

Limited SSH user on Ubuntu 12

I'm running Minecraft on a server. How can I give my friend SSH access just to the minecraft folder (a root folder), the screen command, and some ports?
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2answers
1k views

Deny flash plugin access to (a particular) webcam

I recently bought an external webcam to play around with OpenCV. It works great out of the box in Debian, but I realized that when I browse any site that contain flash content (youtube, soundcloud), ...
2
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1answer
1k views

Mounting a Windows partition without giving execute permission

How can I mount a Windows partition so that the files within it don't have execution permission? I mount a Windows partition using: sudo mount /dev/sda3 win win is a folder in my home dir. This of ...
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1answer
7k views

Understanding udev rules and permissions in libusb

I had a problem with my scanner. Xsane worked only as root. Using it as normal user it didn't find any devices. Adding the user to the groups saned or scanner didn't help. Finally I solved the ...
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2answers
3k views

How can I allow a different user to connect to my session using X11vnc?

I'm trying to use x11vnc to allow users to remote control certain computers. This works fine in general, but there is one aspect I have trouble implementing. I want to restrict access to a specific ...
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1answer
156 views

How do I keep KDE from asking new users for a password when I use /etc/skel to set up their enviroment?

I made this nice custom KDE setup on Arch Linux with customised settings like desktop background, panel settings, kwin settings, etc. I heard that if you copy all the hidden files from your ...
5
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3answers
758 views

chown not permitted, but I have write access. How can I take recursive ownership?

Consider the following scenario: I have rwx access to a directory as a member of the group id of the directory. The system admin does not let users run chown (see this thread for details) How can ...
2
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1answer
777 views

Permissions corrupted?

A few weeks ago, I installed Linux Mint on a USB flash drive. I used it to copy the contents of my HFS+ external hard drive to my Windows drive on my desktop. Then, I formatted the external drive to ...
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1answer
423 views

Giving input to background processes

Is there any way to give input to background processes or which run as daemon processes? I was coding some Puppet configuration files and I had to push them to some remote machine. For that purpose I ...
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4answers
495 views

Strange file ownership with Ubuntu

Normally we know when we create one file in Linux, the file's owner and group will set with the creator. For example, I have one user, usera, after I execute usera@srv1:$touch 1.txt I will find the ...
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2answers
439 views

Password protecting a system file? (e.g. /etc/resolv.conf)

I am trying to parental control myself by restricting web access via OpenDNS. The OpenDNS account password will be handed to someone trustworthy. Now, I want to put some restriction on the ...
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1answer
921 views

Permisions overwritten when files are transfered via FTP. What to do?

Got my web server up and running using apache2 with the ability to ftp to /var/www folder. However, if I make an update to .html and copied over the file via ftp, the file's permisions become more ...
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1answer
5k views

No permission on external drive [duplicate]

Possible Duplicate: can't change file permission On my hard drive everything is fine, but when I go onto my external drive I can't chmod. I get no error message but the changing simply ...
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3answers
18k views

What does GID mean?

What does GID actually mean? I have Googled it and this is what linux.about.com said: Group identification number for the process. Valid group numbers are given in /etc/group, and in the ...
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2answers
435 views

Should I change the permissions of binaries?

I'm running CentOS 6.2 and installed nginx as root. After the install I changed the owner and group of the install to it's own user and group to keep thing a bit more secure. I logged in as root and ...
153
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7answers
249k views

How do I copy a folder keeping owners and permissions intact?

So I was going to back up my home folder by copying it to an external drive as follows: sudo cp -r /home/my_home /media/backup/my_home With the result that all folders on the external drives are ...
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1answer
2k views

Why can't root execute when executable bits are not set?

root user can write to a file even if its write permissions are not set. root user can read a file even if its read permissions are not set. root user can cd into a directory even if its execute ...
2
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1answer
5k views

How do I set permissions for a directory so that files and directories created under it maintain group write permissions? [duplicate]

Possible Duplicate: Make all new files in a directory accessible to a group I have a directory in which collaborative files / directories are stored. Say directory abc is owned by root and ...
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2answers
738 views

Gaining root privileges in SCO

I am learning Linux for work, so am still a bit rusty on the edges. I need to change the folder permission of the directory /opt, and I know in Linux, you do the following: chmod 775 /opt I get a ...
27
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1answer
41k views

How to skip “permission denied” errors when running find in Linux? [duplicate]

Possible Duplicate: How do I remove “permission denied” printout statements from the find program? When I run this command in Linux (SuSE): find / -name ant I get many error ...
2
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3answers
4k views

Change Folder Permissions

I started off with changing to the folder I want to change permissions for, and that is the opt folder. $ cd /opt/ test@testVM:/opt$ So I tried changing the permissions for this folder now using: ...
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1answer
1k views

Can I restrict a user to use special programs?

Is it possible to add a user and restrict him to run special programs? For example after this user logs in, he can only open Firefox to use Internet and no other programs can be run by this user. For ...
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4answers
10k views

What is the default permission of folder /var?

I am a complete beginner in Linux. I just installed Ubuntu 12.04 in a pendrive, then installed MySQL and Apache PHP and then I tried to install Moodle (a distance learning platform I use at work). The ...
5
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1answer
3k views

How do permissions work when moving directories?

Recently I tried to move a directory that I own to another directory (which I also own), but I couldn't. I then noticed that I don't own the parent directory. This made me wonder what are the rules ...
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0answers
655 views

Permission issues while setting up cakephp

I am pretty new to linux and trying to setup cakephp on opensuse 12.1. I did as told on the cakephp website(blog tutorial) and most probably encountering some permission issues. I slapped the cakephp ...
3
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2answers
444 views

Can AIDE scan a directory inside a directory the user doesn't have read permissions for?

I would like to use AIDE to help me verify the integrity of my home directory on a shared Linux system. I am not an administrator of this system. I have built and installed AIDE in my home directory ...
8
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2answers
4k views

Evince fails to start because it cannot read .Xauthority

I'm logged in remotely over SSH with X forwarding to a machine running Ubuntu 10.04 (lucid). Most X11 applications (e.g. xterm, gnome-terminal) work fine. But Evince does not start. It seems unable to ...
0
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1answer
3k views

Giving apache user same permissions as root only on specific folders

Not sure if this is possible but is there a way to grant the Apache user same level of permissions (ownership) as root only on specific folder(s). Why I need this: We have a CentOS 6.2 server with ...
4
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1answer
999 views

Set GPIO permissions cleanly

Can the default permissions and ownership of /sys/class/gpio/ files be set, e.g. by configuring udev? The point would be to have a real gid for processes that can access GPIO pins on a board. Most ...
3
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1answer
4k views

How should I rsync files in /var/www if I want them to be owned by www-data?

I have set up a new ec2 ubuntu box and installed apache and php5. By default you log onto the box with the ubuntu user who has sudo privileges. I believe apache runs as root and php5 runs as ...
5
votes
2answers
540 views

Is it possible to represent the +X symbolic permission with an octal value?

Is it possible to represent the +X symbolic permission with an octal value? The chmod(1) man page says: execute/search only if the file is a directory or already has execute permission for some ...
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2answers
3k views

can't change file permission

Whenever I create or copy few shell files to usb storage device, then I am not able to make them executable. If I create test.sh, it's default file permission will be 644, but when I execute ...
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2answers
2k views

What causes files to lose permissions?

There's been more than one occasion where something has gone with system because all the sudden there were permision changes to certain key files (sometimes taking a long time to find which file is ...
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3answers
277 views

When adding a user to a new group when does the user group permissions become active when its a /nologin user?

I have a service level account to run my webserver, and this user is setup with /sbin/nologin. Normally when you add a user to a group you must logout and login to use the new group permissions. ...
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3answers
21k views

How to check which Apache group I can use for the web server to write?

I'm trying to make Wordpress work. I currently have this error message: Could not create directory. /var/www/html/wp-content/upgrade/theme_name when trying to upload a theme. This is the ...
3
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4answers
6k views

Permissions to deny SSH users from accessing other user's folders

I am currently running Fedora on a network computer, acting as a host to other users who will SSH into my terminal to do their work. However I realised that they are also able to access my /home ...