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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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: ...
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1answer
229 views

How to create a user with minimalistic permissions on OpenBSD?

I want to run the webbrowser (xxxterm) with a different user (XY) on an OpenBSD Desktop (different user from the one I use daily). I will reach the Browser with ssh -X in the local machine (or are ...
3
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2answers
210 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?
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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 ...
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3answers
240 views

Permissions for a submission script

I'm a TA for an introductory Python programming class (all work is done from the terminal), and I'm writing a project submission script. Ideally I want a directory setup like this: submissions/ ...
3
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1answer
3k views

NAS box mounted via CIFS - problem with permissions

I'm running the latest version of Ubuntu, and have mounted a SMB share via a line in rc.local. The share mounts correctly, and I can browse files freely, create new files, and then delete them ...
2
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1answer
125 views

Different write behavior for owner and member of group despite 775 permissions

I have mounted a remote share via my fstab using the line: //path/to/target /media/f cifs gid=<mygroup's id>,dir_mode=0775,file_mode=0775 0 0 As a result, everything under /media/f winds up ...
2
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3answers
6k views

Allow a user to view the home directory of other users via sudo

I am new to system administration. We have a lab set up where we have a server and client machines. The client machines have LDAP users which has the work area for all the users in the centralized ...
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1answer
725 views

How to assign correct permissions to both webserver and svn?

I've an issue with files ownerships in unix. I have a drupal website and the "files" folder needs to be owned by "www-data" in order to let the users to upload files with php. However I'm now using ...
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3answers
64 views

Predefined group ids across Linux distros?

In order to successfully implement w/r access via ACL for external storage with ext4 fs I need to assign default group id for files on storage. LSB_5.0.0 say: This specification makes no attempt to ...
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3answers
214 views

To Rsync files where permission denied

I want to find those files which I cannot copy to another location such that I could do Rsync. I have an external HDD and my system´s HDD. The external HDD has files which my system is missing. I ...
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3answers
3k views

Run Linux “motion” app as user

I'm trying to run Motion app on a Linux box. For various security reasons, I'd rather run it as regular user than sudo. However, when I run "service motion start" without the sudo in front, it says: ...
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3answers
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Linux empty buffer cache command permission denied

I'm using the following commands to flush cache: # sync; echo 3 > /proc/sys/vm/drop_caches # sync; echo 2 > /proc/sys/vm/drop_caches # sync; echo 1 > /proc/sys/vm/drop_caches When I use ...
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3answers
2k 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 ...
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1answer
189 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 ...
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3answers
4k views

Why is umask setting a different permission for a directory and file I have created?

Consider: [user@server1 ~]$ umask 0770 [user@server1 ~]$ mkdir TEST2; touch TEST2.txt; [user@server1 ~]$ ls -l d------rwx 2 user group_name 4096 Mar 5 05:16 TEST2 -------rw- 1 user group_name 0 ...
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2answers
1k views

Cannot expand asterisk without proper permission

Can someone explain to me the following? $ ls -ld /temp/sit/build/ dr-xr-s--- 3 asdf qwer 4096 Jan 31 2012 /temp/sit/build/ $ ls -ld /temp/sit/build/* ls: /temp/sit/build/*: Permission denied So ...
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2answers
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How to non-invasively test for write access to a file?

In a shell script, how do I easily and non-invasively test for write access to a file without actually attempting to modify the file? I could parse the output of stat, but that seems really complex, ...
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3answers
27k views

“echo 3 > /proc/sys/vm/drop_caches” - Permission denied as root

I am currently having some issues with the cache. It is a little too much right now so I wanted to clear it. I googled and found this little command: sync && echo 3 > ...
7
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5answers
291 views

Changing Unix group for files

I have a file that a colleague and I are editing together, on a Unix system. We are using Unix group permissions to edit it. We have one Unix group that we are both members of. Whenever I save the ...
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7answers
413 views

File protection in Unix

Is there a way to protect a file in such a way that even root cannot delete it or rewrite it after creating it? I have a file which is created by root under /var/log/ and I want to restrict all users ...
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votes
4answers
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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 ...
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2answers
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Unable to delete file, even as root

I've got a file on remote machine (saying that, cause I don't know who the heck created it), that I've to remove. user@machine:~/folder$ ls lift_proto.db.lock.db And permissions are like this: ...
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2answers
219 views

Why do Linux/POSIX have lchown but no lchmod?

It seems that Linux supports changing the owner of a symbolic link (i.e. lchown) but changing the mode/permission of a symbolic link (i.e. lchmod) is not supported. As far as I can see this is in ...
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1answer
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Hard link permissions behavior different between CentOS 6 and CentOS 7

I'm getting a permissions error in CentOS 7 when I try to create a hard link. With the same permissions set in CentOS 6 I do not get the error. The issue centers on group permissions. I'm not sure ...
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2answers
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How can I ensure only the root user have the right to halt/reboot the system?

CentOS Linux by default allows all users to have permission to "halt" & "reboot" the system by using the commands halt and reboot. How can I configure my system so that only the root user has the ...
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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 ...
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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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3answers
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Frustrating issue where neither cron nor su -c runs my job (permissions?)

Updated (and snipped) with more details below. I've set up a cron script and I'm trying to debug why it's not running. [Snipped context testing, which is all ok; see revision 2 for details] The ...
5
votes
1answer
6k views

mv file without write permission to the source file

I just realised that I can move a file that I do not own and don't have write permissions on. I have write permissions to the directory, so I am guessing that is why I could move it, but in this ...
4
votes
1answer
946 views

Why are execute permissions required to rename files in a directory?

Say I'm the owner of a directory and I have read and write permissions, but not execute permissions, where the directory structure is like this: x/ (drw-r--r--) y (-rw-r--r--) ...
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1answer
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File inheriting permission of directory it is copied in?

I have files created into my home directory with only user read permission (r-- --- ---). I want to copy this file to another directory /etc/test/ which has the folder permission of 744 (rwx r-- r--). ...
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2answers
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Apache ownership and permissions for wordpress

I'm new to running a VPS, but I managed to get the whole system setup and secured without any issues :) My question concerns Apache and the different ways it can operate. For this particular machine ...
4
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1answer
3k views

How are file permissions applied to newly created files?

I have a directory that has the following permissions set: drwxr-s---. user group folder On the desktop, I access this folder and right click to create a new file call foo.txt. Then using the ...
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2answers
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Which systems do not honor socket read/write permissions?

man 7 unix on Linux states: In the Linux implementation, sockets which are visible in the file system honor the permissions of the directory they are in. Their owner, group and their ...
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4answers
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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 ...
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2answers
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How can I backup a directory to NTFS while preserving Unix file attributes?

I want to make a backup of my home directory to an NTFS partition (an unfortunate limitation). However, when I last tried using just cp, the attributes (owner, etc) went away. How can I make a backup ...
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1answer
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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 ...
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1answer
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Help with giving group permissions to other user's files

I'm a linux beginner using Debian 7 and have created a new user (a website) with an htdocs directory like this: $ sudo adduser website $ sudo mkdir -p /home/website/htdocs $ sudo chown -R website ...
3
votes
1answer
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permission denied for ptrace under GDB

I initially posted this question on StackOverflow, as a GDB problem. I didn't find a solution there, but they did help me find that it's a permissions problem, so I'm posting it here. I have set a ...
3
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1answer
3k views

Running executables on an NTFS partition?

My system configuration is the following: UEFI computer Dual-boot with Windows 8 and Linux Mint 15 Olivia I would like to be able to run Linux executables that are stored on an NTFS partition ...
3
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2answers
325 views

File permissions and saving

Let's say you open a file on which you have write permission. Meanwhile you change permissions and remove write permission while you still have the file open in some editor. What will happen if you ...
3
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2answers
453 views

Running user script with root permissions

I have a script that I've made that needs to have root permissions to enable and disable bluetooth features. I am binding this to a button so it is not feasible to log in as root to run the script. ...
3
votes
2answers
3k views

Taking file ownership when file and directory is readable/writable

I got some files in directory: drwxrws-wt 2 me mygroup 4,0K 10.1. 12:34 . -rw-r----- 1 someone mygroup 10G 10.1. 11:22 someonesfile me and someone are regular users without supplementary ...
3
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1answer
618 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 ...
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2answers
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A question about permissions of hierarchical directories

I have some directories, with following permissions: drwxr-xr-x 18 user1 root 4096 Oct 27 11:25 /home/test1/test2 drwxr-xr-x 24 user1 root 4096 Oct 21 08:38 /home/test1 drwxr-xr-x 492 root root 12288 ...
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3answers
406 views

Setting execution right to whole directory - is it good or bad idea?

I have a zip file containing lot of files and directories for a certain application which should be running on Linux. Some files needs to be set as executable, but the zip file format afaik does not ...
3
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2answers
5k views

how to chown mounted device?

When I plug in my external hard-drive when running KDE, it prompts me to mount the device (by clicking an icon, no sudo involved), and once I've done that I am the owner of the files. This is great. ...
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2answers
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What directories/file permissions should i ensure are set?

I have a similar question about default software configuration. For this question i would like to ask What directories/file permissions should i ensure are set? Aprrently Is it normal to get ...
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4answers
303 views

Backup script permission issue

I have a server with a user named deploy-user and have written a backup script to backup a number of websites associated with this user. However one of the sites I'm trying to backup has a directory ...