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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Permission 0000 in /var/www/html through the sFTP

I can write in /var/www/html through the terminal in ssh, but to create a file by sftp through Filezilla, the file created have permissions 000. How do I fix this? My problem is with these ...
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76 views

Common user to modify files owned by 'other' users

I would like to understand how to use the permission system in CentOS to achieve the following: The system has the following users: user1 user2 user3 And the following directory structure.. ...
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260 views

ssh not using ~/.ssh/config, even after I play around with permissions

I tried modifying my ~/.ssh/config file to allow automatic fast X forwarding as per this site http://xmodulo.com/how-to-speed-up-x11-forwarding-in-ssh.html I then tried logging into a server and ...
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237 views

Hide directory listing? chmod 730 /home/share? [duplicate]

So I want to hide the listing of all files to a particular group, yet I want them to be able to create/read files in that same folder. The following permissions on the folder appears to work (write ...
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63 views

Why can't an SGID program read a file from the same group if it's used by another user?

The "wall" command has SGID for the tty group. The proba file has the tty group. The FS that has the wall binary has no SGID mount option. I thought the wall command would just output the proba's ...
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85 views

What is the difference between these two sets of command for configuring ACL permissions?

Hi I am wondering what is the difference between the two sets of commands below: 1) To allow Davis to access and modify all files and folders in the the home directory of John # setfacl -m ...
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18 views

How can I set a folder undeletable but have R/W permissions to it's content [duplicate]

I have a directory which I'd like to mark as not deleteable, but have all the usual permissions of read/write/delete on all subdirectories and files. How can I achieve this? I tried setting the ...
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1answer
110 views

Sudo User: Not able to see the home directory of other users

I created sudo user hrsupport with following commands: hrsupport ALL=ALL, NOPASSWD: /bin/chown, /bin/chmod, /bin/chgrp, /scripts/pkgacct, /scripts/restorepkg How can I achieve this The hrsupport ...
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468 views

/etc/passwd permissions and GECOS field

The default permissions on Ubuntu (or even some BSD) distributions for the /etc/passwd file are 644. It is pointed out in questions like this that /etc/passwd is a sort of user database and it is ...
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633 views

Set group ownership on FTP upload via an ACL

I am interested in setting an ACL which will chown all the files I upload through FTP to the www-data group. However, after performing chown -R user:www-data /var/www/website.com/public_html/ ...
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51 views

Still able to read file after changing permissions

I've made a file as root, and written a string in it. Now I've changed mode to "0" like this: root# ls -al transit/ total 4.0K ---------- 1 root root 6 Jan 5 18:15 27050 root# If I try to tail, ...
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35 views

File permissions on uploaded files

This is hopefully a simple question. I have a VPS set up running LAMP and accepting FTP connections. the only problem with my setup at the moment seems to be that apache is denied access to uploaded ...
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1answer
129 views

Sendmail on hpux: error dsn 5.0.0

I am running sendmail as user smmsp. I have create user,group with same name. sendmail starts ok, but when I try to send email outside of localhost give me this error: Jan 3 20:46:59 hpux2 ...
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165 views

Is file creation atomic? [closed]

I have a problem to solve: I just can make one CURL operation each second, but this operation can send up to 40 parameters. Those parameters are Id's. I have one web site that may sometimes ask for ...
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1answer
50 views

Protecting process's envvars from exposure

From I've read about current best practices for developing web applications (such as the Twelve Factor guide), the recommended approach for storing configuration data is within environment variables. ...
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1answer
130 views

Can't access VirtualBox share from MediaTomb

I just installed Mint 17.1 Cinnamon as a virtual machine using VirtualBox. I want the VM to act as a media server running MediaTomb, however MediaTomb can't access my VirtualBox share. I know I'm ...
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56 views

Limit user from viewing files he doesn't own

Normally, file such as /etc/passwd have the permissions 644 which means that everyone has a right to read the file (4) but only the owner has a right to read it and write to it (4+2=6). I want to ...
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1answer
55 views

What if I add a user to a supplementary group?

I am using debian 7.0 and I added "debian-transmission" to the group "pi" with: usermod -a -G pi debian-transmission I made this change because transmission was not able to write the pi mounted ...
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1answer
476 views

nginx - userdir with user permissions

What I want to do is have the usual server running user files like this: http://users.example.com/~user1/stuff.php which would be stored somewhere in /home/user1/www or something like that, but ...
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1answer
78 views

GNU ls long listing without permissions/mode bit

Is it possible to make GNU ls omit permissions/mode bits in long listing? If not, is there an alternative, practical and commonly available program that is more flexible?
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48 views

Protecting my server from it's own users

Are there any tools to check my server's file system for permission vulnerabilities? My server is a low security web and email server running our local email and website. Anyone in my organization ...
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14 views

CLI: How to set a folder's permissions the same as existing adjacent folders? [duplicate]

I know how to set permissions etc, but rather than: Check permissions of one existing folder; and Note them down somewhere; and Use a command to set the permissions of an adjacent folder to the ones ...
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1answer
496 views

How does ps get the executable of processes of other users?

When running as non-root, if I try to use readlink(2) on a /proc/<pid>/exe for a process not owned by me I get a permission error. So how then does ps with the -f option, which isn't setuid ...
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713 views

Can I make a file only accessible to a script, and not a user?

I have a user with limited access on the system (that is, he is not a sudoer); let's call him Bob. I have a script or a binary which I, the system administrator, trust, and would have no problems ...
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1answer
156 views

files saves to ntfs drive adhere to umask, ext4 does not

I have 2 storage drives, 1 is ntfs and the other is ext4. Both mounted in /media as Storage_1 and Storage_2 I've run chmod -R user:user /media/Storage_* I've tried putting umask=022 in ...
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Adding setuid permissions to a file

I am hosting a php application on my CentOS 5 server. The application runs some commands via a ssh file called openmgr. For that I want to give a permission of -rwsr-xr-x to the file. I tried chmod ...
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429 views

Where are the Android Users and Groups?

Android uses a linux kernel with each installed app getting its own user. I was expecting to find them in /etc/passwd but I couldn't. Where are they stored?
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2k views

Unable to run python script - Permission Denied

Trying to run a NZBGet (Python) Script, I've tried to run manually with: /mnt/local/ext001/MEDIA/NZBGet/scripts/videosort/VideoSort.py but this results in: bash: ...
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1answer
109 views

Detect changes in permissions

Is it possible to detect the files in a folder that have changed their permissions? I have read about the command find and It detects files that have changed the date of last modification but changing ...
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1answer
112 views

Preventing user from accessing parent folders [duplicate]

I have a user who I only want to be able to access /var/www/ucp/ (his home directory). I have executed the following command on the / directory, the /var/ directory and the /var/www/ directory: chmod ...
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2answers
528 views

How to deny mounting permission?

Consider the following situation: /dev/sda1, /dev/sda2, /dev/sda3 are 3 partitions of the /dev/sda disk. Ubuntu is installed on sda1 and /home mounted on sda2. Only one user foo on Ubuntu system so ...
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2answers
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assigning read/write privileges for a folder to a user in CentOS 7

I am logged into a CentOS 7 server as root. I created a folder /somefolder. I want someusername to be able to write to that folder via scp from a remote computer. What command should I run so that ...
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886 views

Cannot access a directory with permissions drw-rw-r— [duplicate]

I am having a very strange permission issue when trying to access any of the files in a certain directory as a specific user (adventho). This has been working fine for several months and I just ...
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2answers
76 views

how to set more than 3 level of access permissions for a single file/folder?

normally I can only do 3 levels: owner, group, others But I want 6 for group1, 5 for group2, 0 for all other groups how can I do this?
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3answers
4k views

chroot permission denied! But Im root!

I am trying to chroot into an old HD to change a forgotten password, but chroot says permission denied? what gives? I am root! The harddrive I am trying to chroot into is an old version of edUbuntu ...
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1k views

Service start and Permission denied

I have a script that execute a java program, and I want to create a service to start this script at boot time. So I've created a script called run.sh. /test/run.sh #!/bin/bash java -cp ...
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1answer
2k views

Cabal error: Cannot run c compiled programs

I have an old version of cabal-install so I downloaded cabal-install 1.20 and When installing it errors out. Additional note: ghc 7.8.3 OS: CentOS 6.6 Error: Building network-2.4.2.3... ....... ...
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609 views

Linux user in group can't cd into directory with executable permission

(Ok, originally asked this on StackOverflow, got it downvoted with a suggestion to post on SuperUser, where I got a hint (but no luck) with using FUSE to mount media. As serverfault seems to have the ...
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1answer
2k views

Mounting a NFS file system by changing default owner

I want to mount a NFS file system with user/group ownership of <admin> . How it can be done ? mkdir /cert chown admin.admin /cert mount -t nfs 192.168.2.149:/portalweb /cert/
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1answer
456 views

Hard Linking Other Users' Files

Suppose User A and User B have disk quotas of 1 GB. Also suppose User B creates a 900 MB file with permission 0666. This allows User A to access that file temporarily (for some project, etc.). Notice ...
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1answer
30 views

give group permissions to specific device

I have a panning web camera I built, (future robot arm). The camera pans via a web interface (cgi scripts and JS interface) which access an arduino. To enable sending of commands via the interface, I ...
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1answer
143 views

How to give permission to group to read/edit unowned files on archlinux?

I'd like to be able to read files from external hdd or other partitions without having to su root every time or chmod the whole partition to myself/group. How can I give myself/group permission to ...
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1answer
20 views

Permissions issue with script

I was trying to run a script to set my Oracle environment in RHEL. I ran it as ./foo.env, but it wouldn't run because of a permissions issue. I then ran it as . ./foo.env, and it ran successfully. ...
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1answer
98 views

doesn't symbolic link changes it's permissions if I remove permissions in actual file?

I actually started learning Unix and while doing so I stuck here. Though It may seem silly question I'm actually unclear with it so please help me. I've a file as somefile.txt and a symbolic link ...
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1answer
109 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 ...
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1answer
110 views

Do root's supplementary groups behave differently than regular account ones for NFS shares?

OS: Linux CentOS 7, NFSv4 On one machine I exported an NFS share group-owned by the nfsgroup with 2770 privileges for group collaboration: groupadd -g 5000 nfsgroup chown nobody:nfsgroup ...
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Create a user who cannot explore system directories

I have a Centos 6.5 machine. I add users with useradd username. These users cannot browse other users directory, but they can browse all the OS filesystem starting from / and see configuration, ...
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41 views

How can I set a group policy to all access on all folders except one?

I am currently making a test environment where users will be going through a network administration course with different levels they must complete. Due to the nature of the course, we want to give ...
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53 views

Unable to access a directory despite belonging to a group with write permission [duplicate]

I am learning basic file permission in Linux and tried actions below. I have a folder "music" to which group "music" has wxr permission. I have user "finxxi" added into group "music". When user ...
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1answer
139 views

User cannot access a file after setting an ACL [duplicate]

I cannot enter a directory after creation in a folder with an ACL: I am attempting to limit rwx access to a folder for just a single group and no one else. I would like to be able to add new users to ...