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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When creating a copy of files for a development server, how should I handly differring Group and Owner IDs to allow for easy syncronizing? [on hold]

I am doing web development for a client, and have created a copy of all their files in a development area. This is a separate cpanel account, and I have copied the files across and maintained the same ...
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1answer
25 views

Migrating mounts with identical permissions not working

I have two mounts /mount1 and /mount2. I ran the command: rsync -azrt /mount1/* /mount2/ to clone everything from /mount1 to /mount2. I then altered the /etc/fstab (see below) to remove /mount1 ...
2
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1answer
31 views

No permissions?

Output of ls -l: drwxrwxrwx 16 btsync btsync 4096 Feb 25 15:41 documents I can cd into the folder no problems. Now: sudo chmod 776 documents I can no longer cd into the folder: bash: cd: ...
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1answer
16 views

White-list certain binaries and scripts inside a noexec/nosuid mount?

Just like the question. Is it possible to white-list certain executables from a noexec mounted FS? for instance, mine looks like this: /dev/vg/lv on /tmp type ext4 (rw,noexec,nosuid)
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1answer
40 views

Dealing With A System Which Is Not Letting To LogIn Due To Open Permissions [duplicate]

A colleague of mine told me that after he executed the below command, he's not able to login to the system. No user can login via ssh. Only normal users can login over physical console of the ...
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1answer
25 views

cd: permission denied: binutils-2.21.1

I'm following Tools Used in 6.828 to configure. $ sudo tar xjf binutils-2.21.1.tar.bz2 generate folder binutils-2.21.1 $ cd binutils-2.21.1 cd: permission denied: binutils-2.21.1 $ sudo cd ...
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16 views

Can't make SUID work [duplicate]

I have 2 users: root and usr345 in the system. SUID bit allows the users to execute a program with permissions of it's owner. I created a file: # touch /home/usr345/update-iptables.sh Contents: ...
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1answer
31 views

Ways to restrict remote user to only access a remote database

I want to be able to setup a remote user that can update a PostgreSQL database on a production server. I have two machines, one is a local server that I use as a command and control system, named ...
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1answer
49 views

Getting “Permission denied” when trying to create a file despite correct permissions

I’m using Amazon Linux and running a script through a Jenkins job, including this line touch /usr/java/jboss/standalone/deployments/myproject.war.dodeploy which results in the error … touch: ...
4
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1answer
44 views

File permissions on Linux?

I am surprised that /mnt, /media or even /opt are not writable by myself on my own system (Linux-Ubuntu). Should I always use sudo for any action on these paths? Or would it be better to add myself ...
2
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1answer
19 views

File permissions while installing a python module

I would like to install sphinx-doc from the sources so I git clone the module then installed it with sudo python setup.py install. Using /usr/local/lib/python2.7/dist-packages/pytz-2016.4-py2.7.egg ...
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2answers
12 views

Shared, read-write, photo directory tree, for normal users

I.e. what I want is the Linux equivalent of Windows Public/Pictures. The problem is that Linux file manager Nautilus doesn't apply default ACLs when you move a file into a folder/directory (nor good ...
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0answers
28 views

gvfs and permissions on a remote external usb drive

I have transmission and deluge (trying to see if it's a problem with the app) and I'm having the same problem with both of them. When torrenting. I get an error " Operation not supported ...
3
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1answer
33 views

ACL not working on directories

For some reason when I create new file from Windows I can change the permissions just fine but when I create a folder it won't let me change the permissions, I get this error: A device attached to ...
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2answers
29 views

Issued chmod 666 * in home directory, permissions problems resulted with all files

I was attempting to give any regular user access to two folders that reside a few branches down in my home folder. I thought I was in the correct directory and typed out sudo chmod 666 *, but ...
3
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1answer
38 views

How to revoke access for a particular user?

How can I revoke all access (r,w,x) for a particular user to a file or directory tree (while still giving read permission to others)? Does setfacl with mask allow this ?
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1answer
17 views

usermod -a -G group user not work [duplicate]

I use Ubuntu 12.04. I am trying to add the user gefalko to the www-data group. I use root@xxx~# usermod -a -G www-data gefalko If I understand correctly, I should now see www-data in the output of ...
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0answers
19 views

What does @ indicate in long file format? [duplicate]

NOTE: Don't know if this matters, but I'm running commands on OS X Terminal. What does the @ indicate about a file when it is listed in long format, ala: -rw-r--r--@ 1 <user> <group> ...
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1answer
18 views

Copy /home without root [duplicate]

I installed Xubuntu on a friend's PC and he understood, that is it greater than Windows 10. He has no practice with shell and dont want to use it! The PC is used by several people. He (the owner) is ...
5
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2answers
278 views

Sed with inplace editing changes group ownership of file

I have shell (php) script that gets in touch with target file this way: inspects whether file and directory are writable with php 's is_writable() (I don't think that this is problem) does in-place ...
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1answer
42 views

How can I execute any command as a normal user without sudo?

Is it possible to assign the sticky bit to sudo in order to execute any command as a normal user? Let's suppose that we have the user test and then: test@test$ apt-get update But I don't wanna use ...
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2answers
36 views

writing into /opt/folder

I'm using gcsfuse with an app I am making to write files into /opt/storage that folder is owned by a specific user called lets say "hero" which is in a group called "hero" too: ls -al /opt: ...
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52 views

Can't change the root password from single user mode

I have redhat 6.x version I am trying to change the passwd from single user mode but I get the following passwd root changing password for user root passwd: permission denied then I try to ...
3
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2answers
81 views

Restrictive “group” permissions but open “world” permissions?

I understand that with Unix file permissions, there's "user", "group", and "world" octets. For the sake of this discussion, let's assume that setuid/sticky bits don't exist. Consider the following ...
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2answers
60 views

touch: cannot touch ‘test’: Permission denied

I try crate file in directory but get touch: cannot touch ‘test’: Permission denied commands: [user@xxx api]$ ls -l total 184 ... drwxrwxr-x 2 root root 4096 2016-04-12 14:38 public .. ...
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41 views

Authentication required to edit Sudoers - User not listed

I made a small typo in my sudoers file, nothing a simple pkexec can't fix. The problem is that when I added my user with "adduser name" and added "name" to visudo, as well as the root and sudo ...
2
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1answer
39 views

Setting a disk space quota on a samba share residing on an ZFS pool

I have several samba shares, one of which is used for storing some backups. I want to set a disk space quota on said share, as the ZFS volume the share resides on is huge and multi-purpose... I don't ...
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1answer
28 views

Where does Linux track who is a group admin through the gpasswd command?

If I modify group membership and admins using the gpasswd command and add a user as a group admin Linux will allow that user to perform tasks otherwise reserved by root. Ex. [test1@centos ~]$ ...
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3answers
32 views

changing permission after copy the directory? [closed]

I have two directory in two different path there are some common subdirectories and files between them I want to copy the content of first directory to the second one meanwhile I need the same ...
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2answers
24 views

Is it bad practice to call scripts from a users home dir from root tasks (eg. dhcp hooks)? [closed]

I have some small script that run at startup and on other events (for example, one that updates a dynamic dns hostname based on the machines IP changing). I would like to keep everything in my home ...
2
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2answers
24 views

User Admin - View Permissions when 750 is used for home

apologies if this question is caused by a fundamental misunderstanding. But as main admin of a server: I want to make it so that users cant see each others home folders. (so I chmod 750 the home ...
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2answers
30 views

How to isolate my browser?

I want to protect my data against a browser exploit, by forbidding Firefox to access any file beside : ~/.mozilla/ ~/Downloads/ I tried to create another user account with which I would run ...
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0answers
17 views

what can cause a socket() “Permission denied” error? [migrated]

Under Android 4, the following simple native C code line fails with an Permission denied error when not run as root: online_socket = socket(AF_INET, SOCK_DGRAM, 0); I do have root access to the ...
3
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2answers
39 views

Primary and secondary groups

So I've got the basics of primary and secondary groups down, but still have some questions I can't seem to find solid answers to: Can many users belong to the same primary group? Can one user's ...
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0answers
23 views

Enable Apache(UNIX) to write on a Windows SMB Share

I want to connect a virtual SMB drive to a Linux server to let peoples save their files/data in a "cloud". To do this, i'm using wordpress, and now what i have to do is to let the apache User write on ...
3
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3answers
44 views

What are the conventional file permissions per filetype before umask is applied

I am looking for a list that specifies the conventional file permission of all the different file-types before the umask is applied. I read in man 1p touch that the default for a regular file is: ...
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75 views

SFTP connection using public key (without password) not working

I need to provide sftp access to a client to my ftp server and this is working fine. For them to access our server without using password - we have followed the below steps on our server. Created ...
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1answer
22 views

How to avoid that Geany editor changes owner of file when it's edited?

I use Geany to edit files in a web app that resides in /var/www. The owner and group of /var/www and all sub directories and files are www-data:www-data. My user account is a member of that group and ...
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3answers
50 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 ...
0
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1answer
36 views

Why can I delete a file that doesn't belong to me? [duplicate]

This should be an easy one... I have the following situation in my ubuntu server (ftpuser is not in the root group): ftpuser$ ch /var/www/ ftpuser$ mkdir test ftpuser$ chmod 775 test now login with ...
0
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1answer
19 views

Setting the SUID for the user at the beginning

I want to add suid. The folder has this permission drwxrwxrwx and I want to change it to srwxrwxrwx. Everything I have tried and read about replaces it at the end of the groups. How can I make it so ...
0
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1answer
24 views

About file permissions and file owner

I was trying to install a Joomla on my Macbook Air under XAMPP. I successfully installed it, but when I try to open the front-end, I keep getting this mkdir():permission denied error. Two questions ...
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28 views

Access directory as a different user

On a Debian (Jessie) server provided by my university, I have a mounted directory (say it's /MagicDir) that can only be accessed by one user (say magicuser). Not even root can access this directory! ...
1
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1answer
35 views

What are the filesystem permissions for a cron job?

I'm working on a production server. It has some daily cron jobs, and here's the filesystem permissions on them: cron.daily$ ls -Al total 24 -rwxr-xr-x 1 root root 332 Dec 3 10:33 0yum-daily.cron ...
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1answer
43 views

Adding user to ownership in addition to another user [closed]

I had some problems with permissions, the programmers of my website wanted me to add the admin user to the apache group and then set some permissions. My knowledge of Linux is quite limited, so I ...
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1answer
30 views

How to set up permissions on external hard drive in order to use it to backup using rsync?

So I have recently installed arch linux, and I was looking into a good way to back up my data. Looking at the wiki, I decided I followed this gude: ...
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36 views

Arch linux filesystem permission read-only

I've just installed Arch Linux and done some installations and thought I'm done, but I figured out that I have no permission to write to my file system or do anything. It's just read-only as in the ...
0
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1answer
29 views

Minimum file permissions to rename file

I put a 64-bit ELF file in my unprivileged user's home directory. I wonder which permissions do I need to have only possiblity to rename this file being logged in as unprivileged user. From what I ...
0
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1answer
30 views

FTP - user to upload file to different user's directory

I installed vsftpd and configured SFTP. I have a standard user who is named, let's say, user1 with all perms. I don't want to give the password to my friend. I only want him to access a specific ...
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2answers
51 views

How do I make there be no group owner of a file in Mac OSX?

How do I make there be no group owner of a file in Mac OSX, since chgrp nogroup file doesn't work? If I try, the group owner doesn't change at all.