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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Samba's “inherit permissions” does not inherit modes for other

I have a share with "inherit permissions = yes". I have a directory in the share with mode rwxrwsr-x. If I create a subdirectory, the modes are rwxrws---. The same happens with a parent directory with ...
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3answers
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Copy files with permission 200

I want to recursively copy a directory, preserving file attributes, which contains a directory tree including some files that have permission 200 (i.e. --w-------). The copy command cp -ar ...
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4answers
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Automatically change file permission upon write to a folder

How can I create directories so: /data /data/user1 /data/user2 and make sure that whenever root writes inside them, depending on which directory it writes to, different owners are set. Example: ...
2
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1answer
506 views

Specific directory permission for one user using sftp

My web server structure looks like this: /Home/User/Public_Html/Website_one /Website_two /Website_three/Directory_one /...
3
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1answer
815 views

How come I can append to files to a directory without write permissions?

I understand this first example: > mkdir foo > chmod u-w foo > touch foo/test touch: cannot touch `foo/test': Permission denied > echo "BAD" >> foo/test bash: foo/test: Permission ...
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1answer
387 views

How to disable messages in unix if mesg and chgrp not allowed?

This is one of my questions for my exam .. We are not supposed to use mesg y/n for this but we should effectively avoid mesgs along with the problem of not being able to change groups.
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2answers
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Block SSH to all but root user

How can I modify my sshd_config so that it blocks access to all users except the root user? I've had a look and I tried AllowUsers root DenyUsers * But that doesn't do anything
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2answers
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How do I find out if I am sudoer?

How does Linux system behave when I am not sudoer? Here is what happens if I try to use sudo: server:/tmp>$ sudo cal [sudo] password for user: Sorry, try again. Is it possible that I just don't ...
8
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3answers
4k views

Can't read a file although it's in my group and permissions for group read are set

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 ...
2
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2answers
6k views

Executing a script from Nagios event handler fails to run

I have Nagios running on a webserver. For this one Nagios service check in particular, if it fails, it will run a script. This script is triggered via Nagios event handlers. Nagios event handler ...
2
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0answers
382 views

Samba: system group mapping

I have w2008R2 PDC and Linux server with samba and winbind. Now I'd like to add some domain users to Unix adm group in AD. Let's say I have adm group defined in AD, and every user from this group ...
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Symbolic link to a socket

From a security point of view, is it safe to create a symbolic link to a socket file? The following bits of context refer to the deployment of a web application on a shared hosting service. $ ls -al ~...
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2answers
169 views

Login to super user for running script

I have sample.sh script in /u01/dump location. I'm running it from root. My requirement is while running the sample.sh script it has to be login as oracle1 user using SU (super user) and display all ...
8
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4answers
13k views

How to restore default group/user ownership of all files under /var?

I accidentally changed /var owner/group to my username and then changed it back to root, but not all the /var folders' owners are root, so is there anyway to change back owner/group of files/folders ...
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1answer
1k views

Simple python web server doesn't execute CGI scripts

I set up a simple python web server by opening a terminal in a directory and doing python -m CGIHTTPServer There is a CGI script in the directory but when I type into the browser localhost:8000/...
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3answers
4k views

read only access to all files in a specific sub-folder

I have got a specific folder located in "/home/.../reboot/". I have a series of users that require read-only access to the ever changing files within. My problem is that the same users are not ...
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1answer
6k views

Full access by group user of /var/www/html [duplicate]

Possible Duplicate: How to add write permissions for a group? On Centos 6 I'm trying to give full access to make and delete by the user mitch for /var/www/http. I did addgroup www and then ...
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2answers
2k views

What does “0” mean in the owner and group permission lists of a file/folder?

The question is in the title. What does the number 0 signify?
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1answer
663 views

Trying to install fonts on Linux Mint Lisa, but it looks like I have a permissions or ownership problem

I downloaded the Source Code Pro family of fonts, but cannot install them via the Font Viewer. If I give myself admin powers, I can manually add them to the rest of the fonts, so I'm guessing it's a ...
8
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1answer
14k views

Cannot delete a file - permission denied - why?

[db2inst1][testing ~/sqllib/db2dump] rm db2diag.log rm: cannot remove `db2diag.log': Permission denied [db2inst1][testing ~/sqllib/db2dump] id uid=1002(db2inst1) gid=107(db2iadm1) groups=16(dialout),...
4
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1answer
2k views

scp permission denied after 'hardening' with bastille

I recently 'hardened' two Ubuntu servers using Bastille, and now I get permission denied: scp whenever I try to scp files in. SSH login works fine. I've tried adding an /scp-dump folder with 777 ...
8
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3answers
29k views

How to grant read/write to specific user in any existent or future subdirectory of a given directory?

I'm a complete newbie in system administration and I'm doing this as a hobby. I host my own git repository on a VPS. Let's say my user is john. I'm using the ssh protocol to access my git repository,...
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4answers
15k views

How to permanently change the file/directory permission [closed]

How do I change the permission of file/directories such that I am able to create, edit, delete files/directories anywhere in my system? Currently I am using Ubuntu 12.04. I tried sudo chmod 777 -r /...
2
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1answer
7k views

How to force rsync to overwrite read-only archive files?

I'm using rsync to copy some source code. The copied code must not be modified at the destination place by my mistake while code editing. So I set --chmod=u-w flag to make it read-only after copying. ...
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0answers
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Owner & Group setting for OpenCart install on CentOS 6.3 [closed]

I'm setting up a development server on a HP microserver with CentOS 6.3. I'm relatively new to Linux and have ran into some issues/confusion. I have the server fully setup/updated with yum. It's a ...
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4answers
11k views

How to revert chown command?

If I run: sudo chown -R user:user / Can I revert it to what it was before I ran it?
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1answer
374 views

Emptying a directory owned by another user weekly

I have a temp directory set up where users can place whatever files they need to send to other users via HTTP. The owner of this directory is an SFTP user, and cannot run cron jobs. I have one shell ...
3
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1answer
150 views

I want to modify root files while also being able to create non-root files in a single text editor session.

Catch 22: If I open my text editor without using sudo, I don't have permission to save any changes. If I open it with root privileges, any files I create are owned by root. I want to be able to ...
58
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3answers
36k views

Why can rm remove read-only files?

If I create a file and then change its permissions to 444 (read-only), how come rm can remove it? If I do this: echo test > test.txt chmod 444 test.txt rm test.txt ...rm will ask if I want to ...
2
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2answers
567 views

SMB Mount To Windows Server Appears to Lock up. Any Ideas?

We are running CentOS 6.3 with all the latest updates. (Attempt to resolve this issue) The Server I am trying to connect to is a Windows Server 2008 R2 box. Though this applies to our old SBS'03 Box ...
3
votes
3answers
4k views

How do I backup via rsync to a remote machine, preserving permissions and ownership?

Drive A is 2TB in a closet at home. Drive B is 2TB in my office at work. I'd like drive A to be the one I use regularly and to have rsync mirror A to B nightly/weekly. The problem I have with this ...
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3answers
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Apache 403 Forbidden on sub folders?

I can view all files in the root directory (/var/www) but as soon as i enter a sub directory (eg /var/www/test) i get a 403 Forbidden error. I'm running Ubuntu 12.04.01. Have tried searching for ...
6
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1answer
181 views

Does the suid bit have any meaning for device files?

Does the suid bit have any special meaning for device files in Linux ?
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7answers
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Transfer files using scp: permission denied

I try to transfer files from remote computer using ssh to my computer : scp My_file.txt user_id@server:/Home This should put My_file.txt in the home folder on my own computer, right? I get scp/...
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3answers
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Root permission - username ALL=(ALL) ALL does not work

I'm a beginner. I'm trying to give my user root permissions, so I edited the sudoers file like this: black ALL=(ALL) ALL "black" is my username. But I still don't have root permissions, and ...
8
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2answers
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How to modify write permission on current buffer in emacs?

Is it possible to change the write permissions on a file from inside emacs, without killing/re-opening the buffer? Sometimes I forget to modify the permissions on a file before opening it. I can ...
6
votes
4answers
4k views

How to setup password-less ssh with RSA keys

I am trying to setup a password-less SSH configuration between two machines and I am having a problem. There are a ton of howtos out there that I have followed and have had no success. Here are the ...
10
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1answer
16k views

Group within group file permissions

I tried finding this on here, but couldn't so sorry if it's a duplicate. Say I have 2 groups and a user: group1, group2, user1 with the following structure: group1 is a member of group 2, user1 is a ...
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2answers
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Mount USB drive (FAT32) so all users can write to it

I have a USB FAT32 drive that is on /dev/sda2. I've mounted it as /media/bigdrive however, I get permission denied whenever I try to touch a file there as a non root user. When I run mount I can see ...
0
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2answers
531 views

Installing a shell (e.g. zsh) without being system admistrator [duplicate]

Possible Duplicate: how can I use bash as my login shell when my sysadmin refuses to let me change it Say I have rwx permissions to a directory (my home directory). Can I install a shell (e.g. ...
0
votes
1answer
912 views

Script with root permission [duplicate]

Possible Duplicate: Redirecting stdout to a file you don't have write permission on I am creating a script to change the brightness of my laptop. I discovered that I can do this using ...
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3answers
13k views

Can files be created with permissions set on the command line?

When creating directories, mkdir -m <mode> <dir> provides for creating one or more directories with the given mode/permissions set (atomically). Is there an equivalent for creating files, ...
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2answers
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encfs with expect access denied

If I execute script #!/usr/bin/expect set pass [lindex $argv 0] spawn encfs -v {CRIPT_DIR} {MNT_DIR} -o nonempty expect "*EncFS Password:*" send "$pass\r" expect eof expect script output: zz@...
5
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2answers
300 views

Running setuid binary temporarily without setuid?

Currently setting up xpra, which wants to run an X instance as non-root using the dummy driver, but the system Xorg binary is SUID. Since the system auto-updates, I would prefer not making and ...
2
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1answer
1k views

Regarding .gvfs not letting delete a user's home directory

I am using Fedora 9. I removed the user using userdel -r command. The user is removed, but the home directory still remains. When I tried to remove the home directory (rm -rf /home/user/), I get the ...
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2answers
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How to give user root permissions?

I just installed Arch. Works great. I created a new user, logged in with it and now I'm trying to install several thing with pacman. But I keep getting the error: error: you cannot perform this ...
6
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3answers
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rsync and write permissions at the target

I always wondered why rsync tries to transfer a file to a remote location where it has read/execute permissions for the target dir, but no write permissions to create the actual destination file. This ...
9
votes
1answer
17k views

Executing a script in zsh - file permissions

I'm confused about execute file permissions not behaving as I expect. Probably because my expectations are wrong. Anyway: I have a script file, for simplicity is just called s, located in ~/bin. For ...
4
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2answers
2k views

Start Vim as my user with root privileges

I have my custom Vim files in ~/.vim and settings in ~/.vimrc. However, sometimes I have to edit some files in /etc and such. If I start Vim like this: $ sudo vim /etc/rc.conf I lose my config ...
4
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3answers
899 views

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 ...