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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Is it possible to disable file permissions on a ext3 or ext4 file-system?

Is it possible to disable file permissions on an ext3/4 file-system? Just wondering if it's possible to completely disable or ignore file permissions on a ext3 or ext4 file system. Perhaps a mounting ...
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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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1answer
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How to mount USB stick on Debian Sid?

I've just installed Debian Sid on my computer but I cannot mount external USB drives as you can see in the image. Mounting failed Cannot mount "SENZATITOLO" Not authorized What should I ...
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1answer
284 views

How to set up a script to run as root non-interactively?

I need to set up the following script to run as root whenever I log in: #!/bin/zsh truncate -s 0 ~yourstruly/.juniper_networks/network_connect/ncsvc.log I know how to run the script as root ...
3
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2answers
989 views

Network Manager doesn't show Wireless connection

I've just installed on my Debian Sid with XFCE4 network manager, but I have a problem, no wireless connection are shown. What Should I do? I used to use wicd but I had problems to connect to free ...
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3answers
825 views

How does gcc handle file permissions?

The executable files that gcc creates have execution permissions -rwxrwxr-x which are different than the permissions that the source file has. -rw-rw-r-- How does gcc set these permissions ?
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Allow all group members to create directories and files

There are 2 users sftp_user apache Both users belong to the updaters group as well as other groups. New directories and files are created in the /updates/ directory. drwxrwsr-x 8 sftp ...
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1answer
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How do I mount an NTFS partition in /etc/fstab and prevent files/directories from receiving exec permissions when they're created?

I have an NTFS partition that I want to mount using /etc/fstab. I don't want any files to have executable permissions on this drive, so I wrote the following rule: /dev/sda2 /media/sharedfolder ntfs ...
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46 views

Existing file can not be found? [duplicate]

/usr/share/tipp10$ ll insgesamt 9408 drwxr-xr-x 3 myname ssl-cert 4096 Feb 26 20:07 ./ drwxr-xr-x 288 root root 12288 Feb 26 20:07 ../ -rwxrwxrwx 1 myname ssl-cert 9480 Okt 6 2010 ...
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2answers
203 views

run a command as different user with available sudo permissions

I want to run the below command echo 1000 > /sys/class/backlight/intel_backlight/brightness i cannot do it it like below beecause bash is the process that actually directs output to the ...
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1answer
1k views

Having owner access on files upon mounted NFS directory

I have a Linux RedHat server and a Solaris 10 client. I have mounted a directory which locates on the RedHat server, in the Solaris system with RW(read/write) option. I already have some directories ...
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2answers
1k views

setfacl incorrectly changes group permissions

To backup the "/home" directory tree of a server, I've created a 'backup' account and used setfacl to make the whole directory readable by it. My cron job runs this command as root each night: ...
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1answer
5k views

Cannot execute binary file on Mac OS X Lion 10.7.5

I want to execute phylocon on a mac OS X lion but after changing the path and making the file executable, I get the error 'cannot execute binary file'. But the steps that I took to running the command ...
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1answer
3k views

File is readable by everyone, but I can't open the file

I'm fairly new to Unix and I have written a script: SERVER="/usr/local/abc/.../somefile.txt" OPTION="$1" if [ x$OPTION = "xtitle" ] then grep $OPTION $SERVER exit fi As far as I ...
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166 views

Problem with encrypting /var/www and ikiwiki

I tried to encrypt /var/www with encfs. To do so I did following: mv /var/www /var/www.bak mkdir /var/www_enc encfs --public /var/www_enc /var/www cp -a /var/www.bak/* /var/www/ /etc/init.d/apache2 ...
2
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1answer
818 views

Properly Set Permission to /home/user folder for webserver

I'm currently setting up my own Linux server running CentOs 6. To test the security on my server I wrote a PHP script that acts like a sort of "navigator". I can go one directory up, open the files, ...
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164 views

External HDD read/write permission changing from a cron job

So, I run an overnight python script that runs a backup of our web data in the /var/www directory, then moves the backups to an external HDD in /media. The script in scheduled in the sudo crontab ...
0
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1answer
36 views

A user in a group does not have group access?

I have a fresh install of ubuntu server 12.10. I have created a group called www-dev and a user called dab. the user is in the group and i can verify that by members www-dev which returns dab. I ...
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2answers
920 views

cannot touch -m a writable file

Can someone explain why I get permission denied when running touch -m on this file even though it is group writable and I can write to the file fine. ~/test1-> id uid=1000(plyons) gid=1000(plyons) ...
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3answers
1k views

Linux Permissions vsftpd

I have mybb installed and running in /var/www/forums. I have two users part of the www group, logan and www-data. I have the recursive permissions of forums directory set to: chmod -R 755 forums ...
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Why does “chmod 1777” and “chmod 3777” both set the sticky bit?

To set the sticky bit on a directory, why do the commands chmod 1777 and chmod 3777 both work?
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270 views

Best location and permissions for socket files [duplicate]

I will have a couple of WSGI applications. They will communicate with nginx using sockets. For that purpose I've created the directory /run/wsgi in which I will place all the socket files that are ...
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294 views

Unable to transfer files via SFTP when using a normal user account

I'm unable to transfer files via WINSCP>sftp to a GNU/Linux server. When transferring a file using root account, there's no problem. However, when I transfer using another account, the file being ...
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2answers
193 views

Circumvent permissions of filesystem on an external drive

Suppose that I have only non-root access on a desktop Linux machine. I want to work with an external, pluggable storage device (hdd, flash drive or memory card) with an ext{2,3,4} file system. Since ...
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1answer
277 views

How are default permissions determined (on OS X)?

My (limited) understanding of basic Unix is that any files that are created will be created based on the permissions of the creating user. In particular, the group assigned will be the creating user's ...
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76 views

What permissions should I set if I'm the only user?

I'm the only user on a OS X machine and am wondering what the best practice is for setting permissions on my sensitive files. Specifically, are there reasons to prefer one of the following -rw------- ...
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3answers
491 views

How to cp or rm files based on ownership / permission

After a problem with spam, I stopped postfix postfix stop and checked through the mailq manually to find hundreds of thousands of unsent spam. The spam was sent from one of the sites hosted ...
0
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1answer
624 views

Execute John the Ripper on multiple processors using mpirun

I am a linux noob trying to optimize John the Ripper for a security class. I am trying to use both processors to run John by using the mpirun program as suggested in this tutorial. I installed mpirun, ...
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3answers
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Is it possible to set per-user permissions in Linux?

Is this possible? It seems that I have more options to set permissions in Windows than Linux. Let's say I want to give a user full access to a top-level directory but limit their access to certain ...
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2answers
126 views

Is there a Linux file permission that allows the app to read a file but not a user?

I need /var/www/config/config.json to be read by my app but not by users calling myapp.com/config/config.json. How would I do that?
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rsync: skip files for which I don't have permissions

I'm using rsync -rlptD to copy a directory from another user. There are a few files (I have no way of knowing these in advance) which I don't have permission to copy. Is there a way have rsync ignore ...
2
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1answer
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why cannot rename subdir when parent dir owner is not the same user [duplicate]

Possible Duplicate: Can’t rename a directory that I own I am trying to understand why when a dir X is owned by user A cannot rename it when parent dir of X is owned by user B. Can anyone ...
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3answers
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Finding lists of files with specific permissions

I looked into the find command and came up with find . -maxdepth 1 -perm 521 > test.txt to output the permissions to a text file, but is it possible to do it just using, for example, simple ...
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2answers
631 views

Is there a generic approach to automatically make some sysfs controls ch{own,mod} user-accessible?

My current primary question motivator: $ ls -l /sys/devices/platform/samsung total 0 -rw-r--r-- 1 root root 4096 27. jaan 14:17 battery_life_extender drwxr-xr-x 3 root root 0 19. jaan 18:40 leds ...
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1answer
292 views

Securely running LAMP under a specific user

I'm setting up a sandbox type of server that will be used by a couple users as a development environment and knowledge base. The server will have a web frontend so I've installed Apache, MySQL and ...
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2answers
754 views

Can a user brute-force a directory listing without having read permission on the directory?

I noticed that when a user is working in a directory to which he does not have read permission that using cd produces different error messages, depending on whether or not a subdirectory exists: $ ls ...
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2answers
8k views

How do I remove a file with no permissions?

A hacker has dropped a file in my tmp dir that is causing issues. Nothing malicious except creating GB's of error_log entries because their script is failing. However, the file they are using to ...
2
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1answer
506 views

How can I copy a git repo from a Makefile?

I'm writing a Makefile to sync my local dotfiles with GitHub. I recently decided to also add my .vim folder to the repo. But when trying to copy the .vim folder I keep getting a Permission denied ...
4
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3answers
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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 ...
1
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1answer
244 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 ...
2
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1answer
6k 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
459 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
576 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 ...
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1answer
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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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1answer
195 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
52 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
123 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
842 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
837 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 ...