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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3
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439 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
votes
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
votes
1answer
982 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
votes
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
526 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 ...
2
votes
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 ...
3
votes
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 ...
3
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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. ...
7
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3answers
20k 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
votes
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 ...
7
votes
3answers
785 views

Prevent a unix account from being able to SSH [duplicate]

Possible Duplicate: Disable direct login for normal users (like oracle) in linux but allow scp and sftp? I want to prevent a unix account from being able to be SSH'ed with, but it should ...
0
votes
1answer
263 views

Incompatible group permissions in Linux - Is it a bug? [duplicate]

Possible Duplicate: How to apply changes of newly added user groups without needing to reboot? I am on Ubuntu 11.04. I am creating another user and placing an existing user in the group of ...
1
vote
1answer
2k views

How to fix this mysql permission problem?

I'm trying like mad to get rails dbconsole to work (Rails 3.2.6, if that helps). The problem is that when I run the command, I get: gems/railties-3.2.6/lib/rails/commands/dbconsole.rb:81:in `exec': ...
1
vote
1answer
1k views

How to create an user only with SSH -access and easily-set-up .ssh -dir perms?

I often mess up when I manually set up the .ssh -dir, easy to forget some flag. I often need to create a new user and only allowing access with SSH, how can I do that? Basically, I want to stop doing ...
2
votes
2answers
954 views

How to set permissions what users can see (drives, folders) on opensuse 12.1?

I have a several users on one machine and its needed to specify which user can access (read & write) specified folders and/or mounted drives. First of all, one user shouldn't see a ...
0
votes
1answer
827 views

OSX : rmdir “permission denied” but directory removed

This is a question from a newbie trying to learn UNIX commands. I was trying to test the rmdir command by removing a test directory located in my Downloads directory. I have read and write rights on ...
7
votes
6answers
22k views

Device is Mounting as Read Only (Can Copy Files as Root)

I am attempting to mount my Amazon Kindle, 3rd Edition. It automounts correctly and when I run mount -l, I get the following output: /dev/sdg1 on /media/usb0 type vfat ...
1
vote
1answer
590 views

How does apache determine what directory to show from public_html?

I am using Ubuntu 12.04 and have configured apache to serve from ~/public_html. I am trying to serve some directory contents over http on LAN. When I did the following: ln -s ...
4
votes
2answers
3k views

execute bit on directories, but not files [duplicate]

Possible Duplicate: How to apply recursively chmod directories without affecting files? What is the command to apply execute permission for directories (for traversal), but leave the ...
4
votes
1answer
1k views

What is “raw mode in hex” from stat output?

When using GNU stat to probe the filesystem, there are a number of format sequences available for the --format/--printf arguments; this one in particular %f Raw mode in hex doesn't make much ...
4
votes
3answers
3k views

Recursively list files with file names, folder names and permission in CentOS

Is there anyway I can list files by typing a command in the shell which lists all the file names, folder names and their permissions in CentOS?
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votes
5answers
78k views

VSFTPD, 553 Could not create file. - permissions?

I've set up VSFTPD on Amazon EC2, with the Amazon Linux AMI. I created a user and can now succesfully connect via ftp. However, if I try to upload something I get the error message "553 Could not ...
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vote
3answers
1k views

LFS can't cd to lfs/source - permission denied

I'm trying to build a LFS using version 7.1. I've followed all of the steps up to 5.3 and now I'm stuck because I can't change to $LFS/sources - I get the message: bash: cd: /mnt/lfs/sources: ...
4
votes
1answer
10k views

How to change permissions of multiple files found with find command?

I have a directory with numerous files. Part of the files have the 755 permissions and the other part have 644 permissions. I'd like to convert the files with 755 permissions to 644. I have tried the ...
4
votes
2answers
4k views

/etc/crontab permissions

The /etc/crontab file has the permissions: -rw-r--r-- I understand that this file is for system cron jobs and other users should not have permission to modify it. The current permissions allows all ...
2
votes
1answer
963 views

using Set uid to run a root command from non-root user

Consider the following two files. summarize's executable UID bit has been set, so that another user belonging to another group can execute the summarize executable that uses the customers.dat file. ...
7
votes
3answers
11k views

bash: /dev/stderr: Permission denied

After upgrading to a new release version, my bash scripts start spitting errors: bash: /dev/stderr: Permission denied in previous versions Bash would internally recognize those file names (which is ...
1
vote
1answer
188 views

Shared partition permission management

I am willing to try a dual boot arch/lmde setup on my laptop next week, but I've ran into a problem: I want to have a shared data storage where my downloads, documents etc would reside and could be ...
2
votes
2answers
86 views

PHP file permissions for Development machine

I've just upgraded my development machine and have moved over a website I was working on. However, the permissions don't seem to have moved over properly. The dev machine is a Linux machine which runs ...
7
votes
3answers
8k views

Give user permissions to all files and folders

I want to have a user who has access to all the files and folders on the system. This is for the purpose of using RSYNC on a local machine to backup a remote machine. At the moment we are using the ...
2
votes
2answers
91 views

How can I set these permissions?

I was so sure of myself, I thought I knew about permissions. Until someone asked me this. Having these users: User Group ---- ----- juan juan pedro pedro maria maria jose jose miguel ...
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2answers
6k views

Permissions/ownership of /usr/local/bin

From what I understand, the right place to put your own scripts is /usr/local/bin (for instance a script I use to back up some files). I notice that this folder is currently (by default) owned by ...
4
votes
2answers
1k views

How to set secure permissions for multiple users and multiple websites?

On a Gentoo 3.2.12 server with apache2+php, there are several websites running: /www /website1 /website2 ...etc The apache user should have read-only access to all the websites. There ...
2
votes
4answers
5k views

Why is the default umask value for useradd in openSuSE set to 022?

I recently built a very simple test environment with oepnSuSE. As I tried to configure a shared directory, wihtout using ACLs, but with SetGID on that directory instead for some reason, I noticed ...
29
votes
2answers
41k views

SSH and home directory permissions

It took me hours to solve this SSH problem with one of my class accounts on my school's servers. I couldn't ssh into one particular class account without entering my password, while passwordless ...
5
votes
2answers
4k views

If I change permissions on a tar file, will that apply to the files inside it?

I have a script that runs regularly via cron, that creates a tar.gz file for the purpose of backing up a directory. For reasons beyond my control, the only user who can execute the script via cron is ...
2
votes
1answer
501 views

Daemon file access denied while it shouldn't

I recently installed a new SSL certificate and then also decided to tighten security a bit by make the private key less readable. This caused a problem with exim. The certificate is now 640 with ...
10
votes
4answers
8k views

Test effective permissions of file for user

Is it possible to test effective permissions of a file for a specific user? I normally do this by su user and then accessing the file, but I now want to test this on an user with no shell (i.e. a ...
1
vote
1answer
2k views

exclude commands from user's sudo permissions

Consider the following line in a /etc/sudoers file: username ALL=(ALL) ALL, !/usr/bin/passwd as far as I know, this allows user username to use sudo, unless he not uses /usr/bin/passwd. But ...
4
votes
1answer
2k views

NFS different uig/gid on hosts

Scenario: There are different mappings of UIDs and GIDs between hosts that would like to have NFS share. Is there workaround without changing number mapping on hosts ? Example: Is there a way to ...
6
votes
2answers
1k views

Protect files from `rm -f`

Much to my immediate chagrin, removing write permission from a file does not seem to protect it from rm -f: touch foo chmod a-w foo rm -f foo How can I protect a file from accidental deletion when ...
1
vote
2answers
2k views

How to configure sudoers to allow running sudo command under other group and user name?

How to configure sudoers to prevent having the Sorry, user ****** is not allowed to execute error message. Background For the purpose of testing how a python script under a less privileged user and ...
2
votes
0answers
681 views

proper permissions under HTTP root with Apache2 + FastCGI + Suexec

I currently have a setup which runs Apache2 + FastCGI PHP + Suexec. As an example, I'm using /mnt/data/www/vhosts/inflex.co.uk/htdocs as a DocRoot for one of my virtual hosts. I have a script ...
1
vote
4answers
978 views

grant permission in linux

I have a linux web server with 2 hard-drives. There are 2 users, one can access /home/user1 and the other user can access /home2/user2 I would like to grant user1 permissions to access /home2/users/ ...
4
votes
3answers
19k views

Giving PHP permission to write to files and folders

UPDATED FOR FURTHER CLARITY: According to http://expressionengine.com/user_guide/installation/installation.html, it says: For most Unix hosts the following is typical, but you may check with your ...
2
votes
4answers
1k views

Editing a file without overwrite permission

Is it possible to set permissions for file to keep it editable but without permission to overwrite? I mean possibility to edit the file with text editor, but denying any attempt to replace the file ...
2
votes
1answer
1k views

How do I restore default owner of files in /var/ directory? [duplicate]

Accidentally in /var/ directory I ran chown root . -R;chgrp root . -R. Now services like mysql don't start. Is there a way to restore default owner and groups? If there is no way, what is the default ...
2
votes
2answers
1k views

Search for file permisions other than 755

In AIX really, how can I search in several directories and those below it, for files that are not of the specific permissions of 755. So I want to search /path/to/, /path/to/mydir, ...
4
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2answers
2k views

Is it possible to enable execution of files from a cifs mount in bash?

I have a remote mount with cifs and it would seem there is no way to have bash execute scripts from that mount, is it possible to enable such execution? ls -lh ini* -rwxrwxr-x 1 alan 500 222 ...