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.

learn more… | top users | synonyms (1)

0
votes
1answer
58 views

Can't simulate initial login using sudo

$ sudo -iu cyrus sudo: unable to change directory to /srv/cyrus: Permission denied sudo: unable to execute /bin/zsh: Permission denied I don't understand why I would get permission denied for ...
2
votes
1answer
70 views

How to add a read only group permission to a folder that already has a default group, and have it inherited for all newly created files & folders?

In Windows this is easy. I never fully figured out Linux permissions, I have a directory such as this: /Photos The current ACL permissions are as follows: owner: root - full access group: photos ...
2
votes
4answers
61 views

Is there a folder accessible to all process and users at all times?

I have a script that gathers debugging info from the running environment and I need to figure out were I can save that info. It may be called anytime: at boot when the system is running at ...
0
votes
2answers
1k views

Mounting Windows shares using cifs results in “Error:13(Permission denied)”

Ubuntu 12.04.1 LTS, kernel 3.2.0-57-generic Windows Server 2008 R2 SP1 x64 Trying to setup a network share from Ubuntu 12.04 to a Windows Server 2008 R2 however no matter what changes are made the ...
5
votes
1answer
247 views

Apache, Group Permissions and User Uploads

I have a folder named "digitalgoods" with the following ownership -- apache:apache residing outside of the htdocs folder and is therefore not accessible to the public. However I need the same folder ...
0
votes
1answer
38 views

Permissions for non-htdocs directory

I have created a folder outside of my htdocs directory as a means of adding extra security for downloadable digital goods to be sold from within a Magento storefront; so my question is: what ...
1
vote
0answers
25 views

mount: fmask options is not working

Few days ago I did this question. But now I have another problem, related, but new. Scenario: I have a flash drive (vfat) mounted in /media/flash the filesystem node is /dev/sdb1. according to ...
2
votes
2answers
195 views

Permission change to exclusively all folders (or .extension files)

I want to change permissions of all 777 folders to 755 and also change all 777 php files to 644. How can I do this through shell? P.S: all files and directories are in www directory.
0
votes
0answers
40 views

How do I solve rcp errors on Solaris?

I am using Sun Solaris7 for running my ucam software, and I need to load data from my ucam system to one of my plotters that is also running on Solaris 7. When I load the job I am getting the ...
-1
votes
1answer
69 views

How to Always make the ttyUSB0 none root access allowed?

Ubuntu 13.10 64-bit OS. I have a service running using Python serial the application running without root as username. But it has to access /dev/ttyUSB0 , so i need to do every time manually chmod -R ...
1
vote
2answers
53 views

Command to know privileges of a user group

If I run cat /etc/group command or groups username I am able to know the list of groups as group of a particular user. Is there any command through which I could know which type of privileges a ...
0
votes
2answers
63 views

Apache folder permission error

I have a folder name public that I set up Apache to serve files out of, for some reason I was getting a 403 with the error message: You don't have permission to access / on this server. My ...
1
vote
1answer
329 views

Repairing CentOS 6.5 permissions after file migration

I'm running CentOS 6.5 in a VirtualBox VM. Recently, I ran out of space for my virtual hard disk. To remedy this, I decided to create a second hard disk for the /usr directory. I mounted that and ...
0
votes
1answer
71 views

Solaris 10 Default File Permissions

I've created an NFS mountpoint with rw permissions. How do I set new files in a directory to be created by a specific user/group with certain permissions?
1
vote
1answer
56 views

user accessing and permission denied

I had a user john in fedora 19 usergroup marygroup useradd -g marygroup mary usermod -a -G marygroup john In John terminal: cd /home/mary Permission denied cd /home ls -l drwx------. 11 john ...
2
votes
0answers
47 views

What privileges do I have (find out within bourne shell script) [closed]

I am hacking away on a remote helper for git. The script is in bourne shell. I wanted to create some temporary directory in the home dir. For some reason I get permission denied. From my shell ...
1
vote
1answer
91 views

temporarily disabling one's own filesystem write permission

I can't believe there is no simple solution to this (because it seems potentially a very useful feature to me), but so far I couldn't find any. I'd like to be able to (temporarily) turn off my own ...
1
vote
0answers
44 views

Disable commands for users [duplicate]

I have users that login automatically via ssh to a script I defined instead of a shell. The script basically launches a program which has a shell-escape in it which would allow the user to execute ...
4
votes
2answers
1k views

External hard drive permissions - ext4

I have an external USB 3 disk drive (2TB capacity) that is most likely going to be moved from machine to machine. The disk has a GUID partition table and an ext4 partition. I am unable to write to the ...
3
votes
1answer
89 views

directory changes permission when mounted

I want to mount a samba sghare to a directory in my home dir. I have created it but mount the share as root. Upon mount, the owner of my dir changes to root and my user doesn't have permission tow ...
3
votes
1answer
130 views

fail2ban permission denied on script

I've just upgraded from RHEL 5 to 6.5 and setup fail2ban anew. I can't seem to get my custom action to work now, supposedly because of a permission issue. I wan't to know what am I doing wrong, and ...
3
votes
3answers
227 views

Convert the permissions in `ls -l` output to octal [duplicate]

I want to convert the output of ls to octal permission bits. I think of the shortest and clearest way to implement that excerise: Let's say that we have as input: total 1 drwxr----x 1 user2 workers ...
4
votes
4answers
707 views

Is making /var/log directory read only on debian linux safe?

I am installing a really small server which got a 512mb CF cars as HD. Not only I haven't plenty of space, but I would like to minimize the writes to disk. I would like to completely clear the ...
7
votes
1answer
484 views

Why cannot a user change group ownership of his own files? [duplicate]

Why cannot a user change the group permissions of files which he owns. Let's suppose I have user martin: $ ls -lAd /home/martin/ drwx------ 8 martin martin 4096 Apr 20 01:06 /home/martin/ For some ...
1
vote
0answers
218 views

Save motion output videos in USB Drive

I'm using a USB drive in my Raspberry to store my website. Now I want also save my videos made with motion. I wasn't able to save in a folder different from /tmp/motion so googling I found I had to ...
4
votes
2answers
126 views

modify file ownership for files inside tar archive

I am working as user, and I would like to create a tar archive, which when unpacked (by root) will extract its files with root ownership (otherwise root would have to change the ownership manually for ...
2
votes
0answers
1k views

fatal: bad ownership or modes for chroot directory component “/”

I used to be able to connect via ssh with the user I have created but now I keep getting: "Write Failed: Broken Pipe" and I can only connect as root In the ssh auth.log I get the following: ...
1
vote
2answers
107 views

UNIX ACL disadvantages [closed]

I have read a lot about how great UNIX ACLs are. For example, one good example can be viewed here. However, are there any disadvantages or configurations that cannot be expressed using ACL?
2
votes
2answers
115 views

mount changes directory permissions to admin:admin?

I'm mounting a samba share from one CentOS server to another using: mount -t cifs -o blarg,password //10.151.170.170/events /var/blarg/copy-to When I do this the permissions of /var/blarg/copy-to ...
1
vote
1answer
143 views

Mount image user-readable with udisks2

Loop devices, i.e. for mounting raw disk images, can be managed without root privileges using udisks. For testing purposes, an image can be created and formatted like so: dd if=/dev/urandom ...
-1
votes
1answer
80 views

What can I do if I got locked out by cphulk?

Is there any way in Linux to create another user with root rights? I got locked out by cphulk and I need some other way to log in. Notice many ways to fix this involve logging in to root or whm. ...
5
votes
1answer
281 views

Writing raw images safely to USB sticks

Trying lots of different linux, on all kinds of hardware I find my self typing commands like this quite often: sudo dd if=xubuntu-13.10-desktop-amd64.iso of=/dev/sdc bs=10240 Needless to say, ...
4
votes
1answer
73 views

Sharing a local directory between local users with full permissions

How do you share a directory /home/shared between two users "eris" and "discordia" such that both can access the directory in their respective home directory, e.g. /home/eris/shared and ...
1
vote
2answers
286 views

How to edit /etc/hosts without sudo?

I have a machine that I can only access using SSH. I was messing with the hostnames, and now it says: ssh: unable to resolve hostname I know how to fix it in /etc/hosts. Problem is, I need sudo ...
1
vote
1answer
39 views

Mounting a device without read permissions

It is possible mount a flash drive without read permission?
1
vote
1answer
355 views

.Operation not permitted. For root user?

In order to find a workaround for a problem I had yesterday (see the question here) I come out with another experiment. After inserting a flash drive (vfat) and mounting its only partition I ...
1
vote
0answers
1k views

Mounting NFS share from Linux client on Windows domain

I've got a client (Ubuntu 13.10) joined to a Windows domain through PBIS/Likewise, serving Samba shares and allowing domain users to login with domain credentials. Outside of the Windows domain, ...
0
votes
2answers
167 views

Can I change devices permissions with chmod?

Before read: I don't want to use any udev rule. I need to change (programmatically) the permissions of some device. But first in order to underestand what I have to do (in code) I want to make the ...
3
votes
1answer
421 views

While trying to open /dev/mtd2 for read/write access: Permission denied

Looks like my MTD2,and MTD3 partitions are write protected. The OS is booting from SD card on a ARM Cortex A 9 processor. root@Xilinx-ZC702-2013_3:~# mount /dev/mmcblk0p1 /mnt/ ...
-2
votes
2answers
75 views

Misuse of go-r *

I am working on a test server. Was logged in as root and issued cd / chmod go-r * I certainly revoked the write permissions for the users that I had created. Did I revoke the permissions (r/w/x) ...
5
votes
0answers
337 views
+100

User permissions inside and outside of LXC containers?

I'm running some services inside of Docker LXC containers on my server and I'm beginning to actually do serious things with them. One thing I'm not clear on is how user permissions work inside and ...
9
votes
4answers
1k views

Sudoers for one day per week?

I have been volunteered by my boss to be the sysadmin for our production redhat server. He asked me to tighten the security to avoid mishaps like rm -f * that occured not long ago. Right now, we ...
0
votes
0answers
37 views

Cyrus create mail box gives error permissions denied

On freebsd91 64 bit i installed exim as mta and cyrus as imap server. I use saslpasswd2 root cyradmin -user root localhost localhost> cm INBOX.Sent It gives permissions denied error. In my ...
4
votes
1answer
261 views

chmod does not change permissions of certain directories

System file: ext4 I changed the owner of files to apache: with the command: chown -R apache: wp.localhost Then, I could not change the permissions of directories in wp.localhost nor the ...
3
votes
1answer
218 views

What is the relationship between root and kernel? [closed]

Based on part of the first answer of this questions: read from a file (the kernel must check that the permissions allow you to read from said file, and then the kernel carries out the actual ...
2
votes
1answer
130 views

How can I get write access to my usb drives?

I have trouble writing to external drives. They are monuted automatically in Nautilus, but I can not copy anything there ('Paste' and 'create Folder' are just greyed out). Does Anyone have ideas what ...
8
votes
3answers
1k views

How Do I check Permissions of Root Folder (/ Folder, not /root)?

Is there a way to check the permissions of the root folder, /? I mean the folder's permissions, not its content's (/var, /usr, etc.) permissions? Running ls /.. shows the content's permissions.
2
votes
1answer
207 views

Can not change permissions of files/directories in a chrooted filesystem

I am using Ubuntu 12.04 LTS 64 bits to chroot into a just extracted to my harddrive (with unsquashfs) Squash File System from a Kali Linux v1.0.5 32 bits pendrive for customizations: luis@Fujur:$ ...
4
votes
5answers
533 views

logic behind deleting files where user does not have right to write [duplicate]

When I create a file with no write permissions in my home directory: $ umask 777; touch testfile $ ls -ln testfile ---------- 1 1000 1000 0 2014-03-21 16:52 testfile $ ..then I'm still easily able ...
0
votes
0answers
100 views

Fixing permissions on a buffalo NAS (XFS via SMB)

I have a Buffalo dual harddrive NAS and plugged one of the drives directly to an SATA port to speed up the file transfer (100 MBit is a 'bit' slow when transfering 2 TB of files). I used a live Ubuntu ...