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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Process owned by root can't write files

I'm running a program (syslog-ng) that must read and write several files in a given path. It was failing at start, claiming that it is unable to open a file in that path. Please, assume this ...
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25 views

Correct way of updating plugins for webapplications hosted on linux

I am developing a plugin for PrestaShop, it works but the issue is with its autoupdate. Sometimes it fails on customers server due to permissions issues. The plugin is downloaded as a zip(using ...
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24 views

Adding supllimentary group so that user can have access

I am using opensuse. I have created a directory projects under /srv and set its permissions to 770 and chown -R wwwrun:developer /srv/projects/ I have used usermod -a -G developer username but I ...
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fstab mount drive as my /home

I am trying to: mount my 2TB external USB hard drive as my home directory at /home/peter ensure that the home directory is owned by me (not root) do all this automatically at bootup Currently: ...
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Equivalent of full control, modify and write in linux

What is the equivalent of assigning Full control, Modify and Write permission, in Windows, to a particular user and group, in Linux? chgrp, chmod and chown seems quite limited in this case.
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File Permissions mode ending in @ or +

I was changing file permissions and I noticed that some of the permissions modes ended in @ as in -rw-r--r--@, or a + as in drwxr-x---+. I've looked at the man pages for chmod and chown, and searched ...
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4k views

How to setup SVN server permissions properly?

I use Debian 7 and have Subversion installed. I can't figure out what permissions and owners to set to the repositories once I create them. I want to have 2 types of repositories: 1) svn/private/* ...
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1k views

Can't change group of files on mount point

I have mounted some ntfs drives. /etc/fstab looks like this: /dev/mapper/fedora-root / ext4 defaults 1 1 UUID=b6603ac8-e004-4cd6-b141-9bc95409e32a /boot ...
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Under what scenarios would I want to set a SUID bit?

I'm struggling to wrap my mind around the concept of SUID bits and why they're would be useful. For example, let's say I have a program: -rwsr-xr-x 1 root root 12364 Jan 12 2013 ...
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591 views

setfacl access issues

I have a list of users (user1,user2,user3,superuser). user1, user2 and user3 belong to a usergroup called normalusers . Now, I need to issue the access control list command for the user superuser to ...
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mount.cifs not respecting file permissions in Ubuntu 12.04.2 LTS

I am attempting to mount a cifs drive in standard Ubuntu 12.04.2 LTS using the following line in /etc/fstab: //server-name/share-name /mnt/archive cifs ...
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Allow a user to read some other users' home directories

I am new to system administration and I have a permission related query. I have a group called administration. Inside the administration group, I have the users user1, user2, user3, superuser. All the ...
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Allow a user to view the home directory of other users via sudo

I am new to system administration. We have a lab set up where we have a server and client machines. The client machines have LDAP users which has the work area for all the users in the centralized ...
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2answers
558 views

Can't run su after changing permissions to su file

I am running Linux Slackware 14.0. I wanted to allow to do su only to the members of wheel group, so I modified the permissions of /bin/su and /usr/bin/sudo files to this: bash-4.2# ls -la /bin/su ...
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How to find a file with specific permission of a specific user?

How do I get a list of all the files which permission is "read and write" for a specific user. For example, when I go on the desktop of my mac, then right click on file "A", then "get info", then on ...
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302 views

How to allow to run su instantly after I added the user to the appropriate group

I have the su executable with the following permissions: bash-4.2# ls -la /bin/su -rws--s--- 1 root wheel 59930 Sep 14 2012 ./su When I am logged in as a user, not in the wheel group and try to ...
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2answers
363 views

Linux shared FTP: one file must not be deleted

Two users: A1:x:1001:1002::/home/A1:/bin/sh A2:x:1002:1002::/home/A1:/bin/sh One group: A1:x:1002: FTP server: fresh install ProFTPd OS: fresh install Ubuntu Server 12.04 One folder (/home/A1) ...
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Maintain (or restore) file permissions when replacing file

I have a command that accepts a file as an argument, modifies the file, then writes it to the file name specified in the second argument. I'll call that program modifyfile. I wanted it to work "in ...
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3answers
2k views

Create a file as a different user and group

I have a bash script with downloads some files, and then needs to set the owner to apache, and the group to a particular user group (that apache is not a member of). Is there a way to create those ...
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1answer
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why have programs like su access to /etc/shadow

Normally only root can access /etc/shadow. But programs like su and sudo can check passwords without running as root. So the question is: Why can these programs access /etc/shadow without privileges? ...
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set read and write permissions to folder and all its parent directories

I need to set read and write permissions for root user to directory subfolderN and all its parent folders till root. I can do it by hands: $ sudo chmod +rx /root/subfolder1/subfolder2/subfolderN $ ...
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2answers
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Execute user script as root in startup applications

I just created a script (logscreenlock) to log lock/unlock screen events (derived from this post): #! /bin/bash dbus-monitor --session "type='signal',interface='org.gnome.ScreenSaver'" | ( while ...
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Pulseaudio failed to create secure directory in nfs share

My pulseaudio cannot run, because it attempts to create ~/.config/pulse under a different user. (probably pulse?). user@localhost ~$ pulseaudio E: [pulseaudio] core-util.c: Failed to create secure ...
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547 views

hiding a php file/folder with php file from ftp user

Is it possible to hide the php files or hide a folder with php files from FTP user accessing? But the files can be executed on a webserver?
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Allow www-data to perform specific commands

I need a PHP script to perform git pull however I am not naive enough to give it permissions on git. I've wrapped git pull in a script which www-data has permissions for, but I'm not sure how to give ...
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318 views

File permissions and saving

Let's say you open a file on which you have write permission. Meanwhile you change permissions and remove write permission while you still have the file open in some editor. What will happen if you ...
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396 views

How to configure polkit with KDE?

My system is Gentoo amd64, KDE 4.11, and lightDM. I updated my system recently, and found out my user account can't shutdown from KDE. The function is disappeared. I looked for a long time, and I ...
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Setting up a shared folder with group: ACL and file creation [duplicate]

I'm very new to ACL, and at the moment I've been trying to set up a shared folder such that any user belonging to a certain group (lets call it "thegroup") can have full access to the folder (which ...
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1answer
924 views

RHEL - permanently unmask all sub-folders and files

I'm new to RHEL, and I'm having issues unmasking a collections of directories. I have a folder where content will be generated content from a python script. The subfolders will exists for a period ...
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420 views

mount tmpfs preserve current permissions

I have a directory of a web application cache and this has the permissions 755 (default), and I configured setfacl additional permissions. the problem is that when I restart the system, the ...
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1answer
105 views

Bad to own a directory outside of your home directory?

Some how, can't remember why, I got into the habit of downloading source to the directory /opt, which I chown to my user/group. I have this feeling that it is not a good thing to do. Is there ...
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“Permission denied” when writing to /dev/stdout

Why cannot I write to /dev/stdout? I am logged in as the root user, what greater permission could I have? root@ubuntu:/# tcpdump -i 2 -w /dev/stdout tcpdump: /dev/stdout: Permission denied The ...
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No *shutdown* function in KDE

My base system is Gentoo amd64, up to date. Before the upgrade, I have the shutdown button in the KDE menu. But after the upgrade, this button is gone...I think it is because of the permission ...
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643 views

Exclude paths that make find complain about permissions

I need to generate a file list from a disk volume. Some of the directories (all hidden directories under the root directory) have strange permissions that causes find to complain. I try to exclude ...
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2answers
4k views

Create user who can only access one directory [duplicate]

I would like to create a user that only has access to one folder and nothing else whatsoever. I have already created a user but he has access to other parts of the system according to corresponding ...
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2answers
5k views

Can edit file as root, but not using sudo

I just faced a really strange situation. I was trying to edit file /usr/lib/thunderbird/thunderbird.sh, which has the following permissions: $ ll /usr/lib/thunderbird/thunderbird.sh -rwxr-xr-x 1 ...
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1answer
108 views

File permissions when mixing command line and server

I have a PHP server which creates folders and files for certain things. I also run supporting code from the command line operating on the same folders and files. The problem is that when running from ...
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1answer
6k views

UNIX: how to change group of read-only file system

I am trying to change the group of a file that I (user123) am an owner of but I am getting an error. It won't let me change the directory permissions, either. It keeps saying the file system is ...
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Permission denied for user accessing mount

Using root I can mount another Linux share no problem. root@crunchbang:/mnt# mkdir javalib root@crunchbang:/mnt# mount -t cifs //10.1.3.7/javalib ./javalib -o username=guest Root can read/write to ...
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1answer
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Cent OS + VSFTP, 553 could not create file, how to allow uploading of files?

I have a ftp server running on Cent OS VM. the goal: public map can be seen by everyone (readonly for anonymous users, write for logged in users) upload map can only be seen by local users logged ...
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2answers
279 views

Log in as one user but authenticate as another

This might be a weird question but I wonder if there are possibilities to this. When I'm configuring a system I prefer to be root so that I don't have to sudo everything. However, the root account is ...
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2answers
2k views

How to change default permissions of files created by a process?

I'm running a game server (unreal tournament 2004) on Centos 6 x86. I use a sh script to start it in a background process. This process (game server) creates different files (demos, logs) and they all ...
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Permission issue on OpenSuSe 12.3

When running openSUSE 12.3, the updater pops up with mysql/mariadb updates available. Being a trusting person, I always update whenever any update is offered. I have spent the day regretting this ...
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Root has no permission on virtual console screen devices

Even being root I can't do the following: # cat /dev/vcs1 cat: /dev/vcs1: Operation not permitted And the rights are set correctly: # ls -o /dev/ crw-r--r-- 1 root 7, 1 Aug 5 22:00 vcs1 ...
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File permissions of file when tranferring from Windows to Unix [duplicate]

When I am uploading a file from windows PC to Unix ,the permissions of file are --wxr----t on unix machine , whereas umask is 0022 .I am not able to understand from where is the file getting ...
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287 views

File permissions of file when tranferring from Windows to Unix

When I am uploading a file from windows PC to Unix ,the permissions of file are --wxr----t on unix machine , whereas umask is 0022 .I am not able to understand from where is the file getting ...
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LXC: Have rootfs mounted without nosuid

I have the container's rootfs in a volume mounted with the nosuid option. When I start the container, its / mounted is then also mounted nosuid, which breaks programs such as sudo. How can I avoid ...
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1answer
560 views

Can't login to remote debian system with RSA key and ssh.exe from Cygwin

I need to login to a Debian server using ssh.exe from Cygwin. I've generated an RSA key and appended it to the authorized_keys file. Debian is OK, because I was able to use the RSA key using PuTTY ...
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1answer
3k views

How to edit /var/www files using phpstorm?

I want to edit the /var/www files using any editor like phpstorm or eclipse etc, without changing the default user/groups setting for /var/www. Since phpstorm is invoke by a script , I dont know how ...
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How do I grant someone else access to my linux server

If you administer a Linux server, what steps do you take to properly grant someone else access? Assuming they will log in over ssh, don't already have an account, and will need root access. ...