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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FS permission scenario

How can I achieve this files & folders permissions scenario: Consider these folder: Folder A: 640 root apache /var/www/A/ Folder www: 640 root apache /var/www/ and this linux user: id user1: ...
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2answers
5k views

Poweroff or Reboot as normal User

To run the command poweroff or reboot one needs to be super user. Is there anyway I can run this as a normal user? I just don't want to sudo and enter my password every time I reboot or power off.
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2answers
2k views

How to hide someone else's directories from a user?

I have several folders: /home/user1/ -u user1 -G user1 /home/user2/ -u user2 -G user2 /home/user3/ -u user3 -G user3 I created three users user1, user2, user3. Each user has their own group. Any ...
2
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1answer
978 views

Allow world access to directory under 0750 directory

I prefer to keep my /home/dotancohen/ directory as permissions 0750. However, I do need Apache to access /home/dotancohen/someProject/public_html/. I know that I could configure the home directory as ...
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0answers
253 views

Can't unlock a file for path change

I'm trying to order the path entries on my mac, but it seems that my /etc/paths file is Locked. I tried the instructions on this link, but I can't save the file as it is locked. I even tried chflags ...
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1answer
724 views

halt, poweroff, shutdown, reboot don't require root?

For some reason, I can run halt, poweroff, shutdown, and reboot as a regular user without root. How can I fix this? Is it something to do with user groups, or is it a seting somewhere?
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2answers
82 views

Privileges on Linux?

In Linux, I had created a userid. After creating this, I encountered a problem that the .EXE Files are not opened on simple click. They seem to be not privileged for my user account. How can I ...
2
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1answer
949 views

Permissions in Ext4 Truecrypt Drive

I just used the Truecrypt GUI to encrypt my entire USB hard drive (currently /dev/sdb). I formatted it to ext4. Now, I can mount it in my home directory with the command truecrypt --mount ...
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1answer
4k views

Set default permisson for newly folders and files in Linux

I'm using OpenSuSE and my computer has only 2 accounts: root and me.I have a directory /srv/www/htdocs/abc. I just want to set it up so that when new folders or files are created in this directory ...
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2answers
2k views

How can I access the log via a php script?

I have a statistics-file on my apache server on /var/www/vhosts/test/statistics/logs/access_log I tried using echo system('cat /var/www/vhosts/test/statistics/logs/access_log'); in a php ...
128
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9answers
18k views

How to chmod without /usr/bin/chmod?

Today I was told a tale by a Unix trainer, a tale where the root password got leaked to the students, and one of the fellas removed the execute permission from /usr/bin/chmod itself. How do you ...
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154 views

file has blank permissions on linux server? [closed]

Why would several files be empty and have blank permissions? For example, ---------- 1 user user 0 Jun 21 00:50 site.com/html/wfc.php ---------- 1 user user 0 Jun 21 00:50 site.com/html/llre.php
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1answer
1k views

rsync “Permission denied” despite ownership

I just rsync'd a bunch of files, from a Windows box running cygwin sshd, to a CentOS 6.4 box. I ran rsync -e sshd... on CentOS to do this. Then I plugged in a USB drive on the CentOS box, formatted ...
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0answers
235 views

Permission in shmget Linux

I've been searching about 0666 permission in shmget(). I know that 0666 permission will grant read & write permission on the shared memory segment. But, how do I prove it have permission if I ...
4
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1answer
118 views

Root not affected by file permissions?

Why does this work as root? # touch test1 # chmod 000 ./test1 # echo "test" > ./test1 I take it root is not affected by file permissions?
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1answer
49 views

Solaris/OpenIndiana: Good documentation for permission-mechanism - roles, profiles and auths?

Are there any good documentation, HOWTOs or books (preferably free and online) describing the permission-mechanism for Solaris/OpenIndiana? How auths, profiles, roles, projects, groups and users ...
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1answer
269 views

Solaris/OpenIndiana: Password for roles?

I've been gently experimenting with roles in Solaris, and wonder a bit about setting a password for it. I want the role I've created to be used by several users, so setting password to the same as ...
3
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1answer
7k views

Can't start Tomcat on Ubuntu

I installed Tomcat on Ubuntu. Then I created a new user. Then did: liferay@web-svr:~/liferay-portal-6.1.1-ce-ga2/tomcat-7.0.27/bin$ chmod +x *.sh Afterwards, I added JAVA_HOME and PATH in bash like ...
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0answers
35 views

Ubuntu directory permissions - Sticky bit - Prevent deletion of a file [duplicate]

I have a database called oss-pwds.kdb located in a folder /keepassx. This is a password database that I use with the KeePassX software. I want to allow all members of the "oss" group to open and ...
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2answers
171 views

How to have a pop-up window for password appear when opening application?

We have build wireshark adding some functionality related to our use, in Scientific Linux 6 system. After this when I start this using normal user, it will not allow me to use the network interface. ...
3
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1answer
223 views

How to create a user with minimalistic permissions on OpenBSD?

I want to run the webbrowser (xxxterm) with a different user (XY) on an OpenBSD Desktop (different user from the one I use daily). I will reach the Browser with ssh -X in the local machine (or are ...
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0answers
382 views

Will there be any security problem to permit non-root user set up a loopback devices?

if the user has full access to the image file (iso or disk image), will there be any security problem to permit him set up a loopback device backed by this file ? % ls -al /dev/loop* ...
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2answers
1k views

Which systems do not honor socket read/write permissions?

man 7 unix on Linux states: In the Linux implementation, sockets which are visible in the file system honor the permissions of the directory they are in. Their owner, group and their ...
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2answers
5k views

Mate desktop breaks with no panels and tens of caja windows on user switching?

I'm using Sabayon GNU/Linux with Mate-Desktop. I have my computer set up for multiple users so my girlfriend and the kids can use it too. ~ $ uname -a Linux 3.9.0-sabayon #1 SMP Thu Jun 27 07:53:45 ...
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2answers
422 views

MacOsx - Shell - list all .php files and their octal permissions, inside a specifc folder

is it possible to list all the ".php" files located into a direcotry and their octal permissions? I would like to list them like this: 775 /folder/file.php 644 /folder/asd/file2.php etc...
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0answers
3k views

Permission denied when Ubuntu is attempting to mount to a remote Windows share folder

Fellow guys, I encountered the error when I's mounting my Ubuntu server to a remote Windows share folder, the following is the error on terminal after I typed command line 'mount -a': mount ...
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4answers
1k views

Why is that when I download a binary from the web it doesn't have executable permissions set, but when I use gcc to build a binary it does?

For example, if I have the file hello.c which just contains: int main() { printf("Hello world"); return 0; } and I built it in gcc with gcc hello.c -o hello I can then run ./hello and it ...
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3answers
1k views

Safer way for granting permissions for self user?

I know sometimes we can do chmod 777 so we have a directory at our complete reach for accessing, reading and writing. But usually I prefer to do a sudo chown {myusername} {directory}. Obviously, the ...
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4answers
28k views

How to check if a user can access a given file?

*nix user permissions are really simple, but things can get messy when you have to take in account all the parent directory access before reaching a given file. How can I check if the user has enough ...
6
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1answer
7k views

How does umask affect ACLs?

Can someone explain to me how umask affects the default mask of newly created files if ACLs are activated? Is there some documentation about this? Example: $ mkdir test_dir && cd test_dir $ ...
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2answers
9k views

CentOS - Issue with write permissions

I am running CentOS 6.4 and I have installed Wordpress on it. (along with LAMP) Now the problem is, that I cannot make any write changes to any files in the wordpress editor: eg. header.php, ...
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2answers
1k views

How to password-protect a script on Linux?

How do you set a password to execute a command or script in Linux? I need to avoid a script (in which user and password details are included) from being used/executed from unauthorized users. So is ...
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1answer
2k views

Security - Giving Apache write access to /var/www/html

I am running Worpdress on an CentOS Webserver. Now, to enable wordpress to be able to upload/write files to the default webserver directory /var/www/html I had to do the following change on the ...
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2answers
1k views

Directory “not found” on HP-UX for NFS mount point

On an HP-UX B.11.31 that mount via NFS a remote disk using mount point /BK_RESTORE, I would like to access a sub directory with oracle user, but I cannot even if permissions are correct. Using a ...
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0answers
736 views

vsftpd - ftp user cannot create folders

CentOS - I have created an ftp user that can log in remotely over the internet to the vsftpd server. Now I can log in via ftp, see all the directory listings (not limited/jailed) to any directory, ...
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3answers
991 views

lxc: running virtualbox inside a container

I've install virtualbox inside an lxc container. However when I try to start a VM I get the message: kernel driver not accessible (rc=1909) ....permission problem with /dev/vboxdrv. This obviously ...
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1answer
66 views

Lightweight userspace sandboxing of filesystem

I would like to trick a non-malicious process to think that it is writing to directory $HOME/abc/def/ while it writes in fact to $HOME/xyz/def (the former path is hardcoded and it does not work for my ...
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2answers
21k views

What are the runtime permissions of a cron job?

When a cron job runs with what privilege does it execute? I'm not sure about that. Is it with the same privileges of the user that added it via crontab -e?
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1answer
181 views

How can I change the error messages for 'touch'?

Lets just have some typical usage of touch as expected: $ touch this $ sudo chown root this $ touch this touch: this: Permission denied Now what I want to do is change touch: this: Permission ...
0
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1answer
444 views

Amazon EC2: Giving Permanent Permission To A Sepecific Directory In Amazon Linux AMI

I have a Symfony2 project that needs full read write permissions to three directories: app/cache, app/logs, and few other directories which are used for uploading. The problem is everytime I push an ...
0
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2answers
3k views

Ubuntu : unable to copy file to dir created under same credentials

I am Windows 7 remoting to Ubuntu 12.04.2 LTS I am new to Ubuntu ( and *nix in general ) and need to understand how permissions are assigned to newly created dirs. Via Putty ssh session : $bash ...
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1answer
169 views

How do I set up proper ownership of these files?

I need the directory /var/www/ (and everything inside it) to be modifiable by only authorized users. The way I tried to do this was: sudo groupadd webmasters sudo usermod -G webmasters pi # My user ...
0
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2answers
64 views

Have rights during shell but not in a script (unless I sudo it)

I have a really basic confusion. How does sudo work? I noticed that when I ran a script it failed, since it tried to write a file in a directory that the following permissions: $ ls -l thedir ...
0
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1answer
68 views

Not able to copy original top command executable over a malicious one

Somebody hacked my system and replaced some of the system commands like top, ps, find etc with malicious ones. Now, I am trying to copy the original ones, but the copy or move commands fail, even ...
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1answer
68 views

Permissions on `/`

What should the permissions be for /? I ask because I completely removed all files from my drive and reinstalled the OS, but I still get "permission denied" errors for /bin/zsh when I try to log in as ...
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1answer
66 views

Doesn't umask apply to files?

I have set the umask to 0. So: $umask 0000 I do echo 'test' > test.txt And test.txt is created. If I do: ls -l test.txt I see: $ls -l test.txt -rw-rw-rw- 1 jim None 5 Jun 30 22:50 ...
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3answers
582 views

Launch a process with limited permissions

I'd like to be able to launch processes with very limited permissions from the command line, basically so that I can run a process that I don't understand without it having access to things in my user ...
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1answer
297 views

Break write permission for non root user?

Can non root user edit files he/she doesn't have access to or create new a file in a directory he/she doesn't own? Is there a way to do that? P.S : I know if root user or file owner gives him write ...
5
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2answers
2k views

How can I ensure only the root user have the right to halt/reboot the system?

CentOS Linux by default allows all users to have permission to "halt" & "reboot" the system by using the commands halt and reboot. How can I configure my system so that only the root user has the ...
3
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3answers
941 views

'setfacl' permissions don't apply to directories created by git clone?

Here's how I am setting permissions for my website's root directory i.e. ~/public_html, where the files that my website serves are placed: sudo chgrp -R www-data ~/public_html chmod g+s ~/public_html ...