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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How portable are the works chmod and chown commands?

Lets suppose a file is being owned by a user named mrxyz with UID and GID 1000, and has RW permissions for the file (esp. in ext file-systems). Now if the file is brought to my system will my user ...
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2answers
1k 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 > ...
3
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1answer
226 views

Why is permission denied for npm start using node-dev?

I am trying to start a node.js application with on a low permissions user. All the files I know of are owned by the correct user and have permissions set reasonably well. I'm trying to use a script ...
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1answer
82 views

How to properly setup web server directory permissions

I'm lost with this, hopefully I can find some help here: I have Ubuntu 12.04 LTS webserver. For example I have user "myuser". There is a public directory which is my web root. I chowned it and all ...
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1answer
173 views

root permission denied on /proc/1/exe

I just performed a fresh ubuntu install and i am seeing the following in lsof: userA@az1:~$ lsof COMMAND PID TID USER FD TYPE DEVICE SIZE/OFF NODE NAME init 1 ...
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2answers
64 views

File executable by all, yet still cannot be executed?

As shown by the following code: ll total 136 -rwxr-xr-x 1 kaiyin kaiyin 19067 May 9 2013 dbmeister.py -rwxr-xr-x 1 kaiyin kaiyin 1617 Jul 29 2011 locuszoom -rwxr-xr-x 1 kaiyin kaiyin 112546 May ...
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1answer
113 views

permission denied when executing binary despite “rwx” priviledge and root user

I'm trying to execute some binary with bash. I am getting a "Permission denied" message despite having given the full privileges (chmod 777) and being the 'root' user: This is the file description: ...
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0answers
24 views

When connected by VNC all files are read only [closed]

For some reason when I'm connected to my server with VNC, I do not have permission to edit system files, even when I su - root I can only access system files in read only mode. Please can someone help ...
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1answer
85 views

What is chmod 6050 good for

Recently I came across to command: chmod -R 6050 /usr/lib/hadoop-yarn/bin/container-executor I don't know what that mean? I know file permissions like 777 etc. in a mode rwx for owner group others. ...
2
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1answer
297 views

Allow all users can write files/folders of user “apache”?

I run Apache 2.2.15 on CentOS 6.4 When a web local run a function and it created files/folders owned by user "apache". I can read these files/folders via samba but i can't write/delete them. I've ...
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3answers
34 views

Is it possible to create a file with the privileges of other users?

I am a user of the root account on the server named A. And I also own the accounts of user1 and user2. When I create a file or directory in the account of user1, I want the owner of the file to be ...
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2answers
45 views

How can I give a permssion to all users for a path using the octal notation?

I'd like to give execute permissions on a path recursively so I can read a file in the directory. The chmod binary that I'm using on Android only supports the octal/numeric notation though. Normally ...
2
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2answers
55 views

Should my /usr/local/bin be 700 permissions?

I just installed npm and node.js, and I couldn't access npm. And I'm like "why?" and my OS is like "because /usr/local/bin is at 700 permissions" and I'm like "should it really be that way?" ...
2
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0answers
387 views

CentOS 6.5 sound permissions

I am trying to configure ALSA for a CentOS 6.5 minimal install, my problem is non-root users do not have permission to access the sound devices in /dev/snd because the files are missing access control ...
2
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2answers
60 views

Why can users delete each others files in this case

I have two users : bob and sally, who resepctively own two files : bob100 and sally100: > ls -altrh /path/to/dir : -rw-r--r--. 1 bob test 0 Jan 7 12:59 bob100 -rw-r--r--. 1 sally test 0 ...
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0answers
33 views

Unable to write to hdd formatted in anything other ext2,3,4

I am unable to write to my HDD mounted on Ubuntu server 12.04 that are formatted to NTFS or FAT32. However when I format to EXT and Mount as auto its able to write. I tried chmod and chown but the ...
2
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1answer
67 views

Allow file manipulation but block folder/subfolder manipulation?

I have an Ubuntu file server (samba) sharing a folder structure with a Windows 7 computer classroom. All users use the same user/pass to access the folders and have read/write permissions. I would ...
2
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1answer
214 views

permission denied on scripts in ~/bin

I set some additional locations to the PATH environment variable in my ~/.bashrc so that these are included/sourced in logins and non-interactive scripts that are scheduled with cron. I've noticed ...
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3answers
75 views

How can I move a file to another user's directory?

I'm using CentOS 6 and I'm trying to move a file from USER A to USER B but I keep getting permission denied. What do I need to edit to allow to me to put files from one user's directory into ...
0
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1answer
39 views

Permissions not extended to user in minecraft group [duplicate]

I have a directory, under /srv: drwxrwxr-x 3 minecraft minecraft 4096 Dec 30 06:23 minecraft Owned by user minecraft, group minecraft. Group has read/write/search permissions. I have a user, ...
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2answers
69 views

Configure external HDD for use with multiple linux PCs

I've got an external drive, and I'd like to have a linux partition on it. I formatted everything correctly on one machine with Fedora20 (I have one ntfs and one ext4 partition), but when I plug it in ...
3
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1answer
268 views

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 ...
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1answer
283 views

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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1answer
95 views

Why can my gentoo systemd installation only execute files as root?

If I try to login as any other user, via su it says 'permission denied'. If I use su -l it says 'canot cd to /home/<user>'. Logging in via the tty just kicks anyone without a message out except ...
2
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1answer
136 views

How to properly setup user/groups/permissions for a web server?

I spent all day figuring this out, but without success, so hopefully I can get some help here: I have Ubuntu 13.10 VPS server with nginx, PHP 5 and MariaDB installed. I created custom system user ...
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1answer
61 views

SFTP Modification time Permission denied when touching/updating files

The file is apache:apache 660 and username is jdoe and he belongs to groups jdoe and apache. He SFTPs into the server with WinSCP but when he goes to perform an edit which includes a set modtime ...
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2answers
194 views

Is a -rw-rw-rw- file really inaccessible inside a drwxrwx— directory?

Say I have a directory with these permissions: drwxrwx--- Inside this directory, a file with these permissions: -rw-rw-rw- Is the file readable/writable by everyone or not ? If not, how secure ...
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1answer
38 views

udev GROUP and MODE assignments on symbolic link have no effect

I'm trying to connect my velleman k8055 board per usb to my pc. For this I have the udev rule SUBSYSTEM !="usb_device", ACTION !="add", GOTO="velleman_rules_end" ATTRS{idVendor}=="10cf", ...
4
votes
1answer
474 views

What does the “@” (at) symbol mean on OSX ls? [duplicate]

When I check permission of less files from the command line on my Snow Leopard OSX system using Bash I see -rw-r--r--@ for certain files and for others I just see -rw-r--r-- What does the @ mean here? ...
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1answer
276 views

Granting all users access to mounted CIFS shares

I'm trying to set up a debian server that will run several network-based services. These services need access to an external network drive to store their data. For security reasons, I have set up each ...
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1answer
52 views

How to mv and adopt target directory permissions

How do I move a file such that the file adopts the target directory permissions? Surely this is an incredibly common scenario.... any help appreciated.
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0answers
46 views

NFS mount edits on local NFS-exported filesystem change permissions on the remote NFS mount

I believe there is a noperm or something to that effect option in NFS, but how do I make sure that if server A is exporting /opt/nfs and it is mounted as an NFS mount on server b /export/serverA that ...
1
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1answer
71 views

Granting permission for all users in a group to write to a directory and all its subdirectories

Trying out Linode for the first time, running an Arch Linux image, I successfully installed nginx as root. This, however, made /usr/share/nginx/html inaccessible to non-root users. Intuitively, I ...
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3answers
40 views

How do I allow rwx access to a specific group with ACLs?

How do I grant read, write and execute to specific group? What I did: adduser test addgroup developer setfacl -m g:developer:rwx /opt/spago41/ When I login as test I can't run: startup.sh in ...
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2answers
92 views

How to modify the permission of jar file exactly same as other machine jar file? [duplicate]

I have two machines, In my machineA I have a jar file with these permissions - -rwxr-xr-x 1 cronus app 16758150 2013-03-19 13:35 exhibitor-1.5.1-jar-with-dependencies.jar In my another machineB, I ...
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3answers
179 views

noexec on /tmp and /var/tmp directory

Our client servers are running old version of jboss (Jboss 4.0) which has lots of known vulnerabilities. Result is that the server is hacked and we are seeing some unknown executables running from ...
0
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1answer
71 views

How to give permissions to other user after logging as root in Linux?

I am a Linux newbie and I have a very basic question. I have one machine which is machineA and I have a root access to that machine. Now I need to create these below two directories and give ...
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6answers
145 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 ...
2
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0answers
28 views

How to control the permission of an application [closed]

I don't want the application have the permission to read some files that is my personal information, can I do it by setting the permission? I hear that AppArmor, is it easy to use? How to get it in ...
0
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1answer
85 views

Can't access the directory /etc/ppp/peers?

I want to read some configuration file. The problem is that I can't move in the folder peers and typing the command ls -l, I see this permission's record: drwxr-s--- root dip ... I never seen that ...
2
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3answers
107 views

How do I change owner/permissions of auto mount on an embedded linaro based linux

I have an ARM based embedded system that when it auto mounts a USB drive it mounts it: drwx------ 6 linaro linaro 2048 Jan 1 1970 PENDRIVE I need to change the permissions and possibly thew owner ...
0
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2answers
108 views

Problem with file permissions in shared directory under /srv between OS X and Ubuntu

I'm setting up some folders where any user in the users group can collaborate on files, on a Ubuntu 12.04 LTS server. It seems that users on my machine have no problems editing each other's files (I ...
0
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0answers
23 views

executing any program in mc ends putty session if not logged in with root

Maybe there is a simple-obvious solution for this but I dont know how to make mc to be able to execute programs when I press enter/double click on it and I am not logged in as root... the executable ...
0
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1answer
684 views

Why am I getting git error “remote: error: unable to create temporary file: No such file or directory” on push?

This problem is getting weirder. My original post follows, but here is the new thing I discovered: I executed git push and it gave me its usual error: Counting objects: 9, done. Delta ...
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3answers
468 views

How do I override rw-r--r— root/wheel for a all files in a directory?

I am trying to delete a directory on OS X. I do rm -r /path/dir but I keep getting many, many messages like this: override rw-r--r-- root/wheel for cron/migrate.php? I type y for one message, ...
0
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2answers
107 views

How to backup /etc/{,g}shadow files with 0000 permission?

I am trying to backup several servers' /etc by using rsync from another server. Here's a relevant snippet: PRIVKEY=/path/to/private.key RSYNC_OPTS="--archive --inplace --no-whole-file --quiet" ssh -n ...
0
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0answers
56 views

Issue with permissions with a USB flash drive

I am running xubuntu 13.04. When I insert a flash drive in my account, I can't save things to the flash drive or remove them from the flash drive. I am able to read from the flash drive. How can I ...
0
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3answers
99 views

How to restrict one user files to another user

On my machine there are user accounts. My question is how to restrict access to ones user files. Meaning no one else can access my files at all. How can I setup this restriction? How many root users ...
0
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1answer
124 views

Upgraded from CentOS 6.4 -> 6.5 and now permissions do not seem to work properly?

I allow my non-root user the ability to view my nginx access.log. I upgraded from CentOS 6.4 to 6.5 and now my user cannot view this file but the permissions still look correct. I removed and ...
30
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4answers
1k views

Why can't I execute shutdown when the permission is rwxr-xr-x?

I'm in /sbin and I see that shutdown has permissions rwxr-xr-x. Doesn't this mean that anyone can execute it?