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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Run a binary owned by root without sudo

I had a question on a job interview: How can you execute (run) the program with the user user1 without sudo privileges and without access to the root account: $ whoami user1 $ ls -l ~/...
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1answer
51 views

my permission command doesn't work properly

find . a* -exec chmod o+r {} \; find . *d -exec chmod o+x {} \; I want to give o+r to all files that start with "a" and o+x to all files that end with "d", but these lines seem to affect all files ...
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2answers
68 views

How to change permissions to all files?

say I want to give set rw for g for all files in the current directory, how do I do it? I tried chmod 006 \; chmod g=rw I'm not sure what to use to represent files
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1answer
163 views

Terminal access permission denied, but GUI access okay. Why?

In OS X, as a limited user I used Terminal to su - [admin's name] and tried to move some files that were in the administrator's public drop box directory into /usr/bin. Couldn't do it. Permission ...
3
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1answer
399 views

How can I lock down a user account to the point that it can read/write/execute as little as possible?

I would like to lock down an Arch Linux user account to the maximum extent possible. The only functionality required for the account is to accept a non-terminal SSH session which allows the client to ...
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3answers
62 views

What is the mechanism for differentiating root requirements for terminal commands?

In the terminal, some operating system commands require root privileges and some don't. What is the mechanism for controlling this? Is each command actually a separate program with its own execution ...
0
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1answer
19 views

R/W on device from web script

Having a web script in PHP that communicate with a device. This device require root privileges. How to do this the best way security wise? There is two modes in the web app, one user and one admin. ...
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0answers
158 views

permission denied for mpicc

I am trying to install and make[1]: /usr/bin/mpicc: Permission denied make[1]: *** [molmatch.o] Error 1 make: *** [all] Error 2 I have mpicc installed in /usr/bin/mpicc and checked the paths in ...
0
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1answer
426 views

Permission denied tmp dir on STIG RHEL

I am writing a program for a DISA STIG version of Red Hat Linux 6.5. I wrote a shell script to do self extracting on the program and when it self extracts put temporary files in the tmp directory that ...
3
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1answer
917 views

Directories showing up in green(executable) even after removing execute permission for all [duplicate]

I just copied a directory from a USB flash drive. I copied it from an NTFS drive and so all the files had execute permission. I executed chmod -x * to undo the execute permission. Despite that, all ...
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1answer
989 views

“You do not have the permissions necessary to view the contents of “Share on name.domain.com”.”

I am having some issues with Samba on my Fedora file share server. I've logged into as the vncuser below on the server itself and I can access the directory, however I get permission denied errors ...
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1answer
416 views

SUID-bit not working for executables within /tmp directory

Printing the value of getuid() and geteuid() from an executable with SUID-bit (chmod +s) turned-on, seems to result with the original caller ID instead of the owner id if the executable is located ...
0
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1answer
460 views

External Hard Drive Issue on mac

After the cd /Volumes command when I type ls it shows me my hard drive name twice, with different permissions. After that when I try to use mkdir to create a directory in the external hard drive I'm ...
3
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3answers
132 views

Password protect a single folder ( not a web folder )

I run debian and I'm looking to limit a folder to only be accessible by one user. How do I set the permissions up so only that one specific user can enter it, and no other user. The folder I'm talking ...
3
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1answer
374 views

write() system call ignores file permissions

I made a very simple program in C which writes "Test string" into file named "file.txt": root@3:~# cat test.c #include "unistd.h" #include "string.h" #include "stdio.h" main() { FILE *fp; int fd;...
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0answers
1k views

FTP connection to Linux Mint: 550 Permission denied. Error: Critical file transfer error

I am using Linux Mint and Apache on my laptop as my own made web server. I can display the html file if I connect to the IP adress. I can display all files in my hard drive if I connect using ...
5
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1answer
548 views

Ability to add files to a directory but not remove existing files

Is there some permissions setup that would allow a user, say, john, to add a file to a directory d, but not be able to remove an existing file owned by another user, say, root? My understanding is ...
4
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1answer
1k views

Why are execute permissions required to rename files in a directory?

Say I'm the owner of a directory and I have read and write permissions, but not execute permissions, where the directory structure is like this: x/ (drw-r--r--) y (-rw-r--r--) ...
4
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1answer
928 views

Fix broken permissions on /var (or any other system directory)

Long story short, I destroyed /var and restored it from backup - but the backup didn't have correct permissions set, and now everything in /var is owned by root. This seems to make a few programs ...
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0answers
101 views

cant edit anything on xampp as sudo user [closed]

I’m new to Linux was an avid Windows user until recently trying on an old system seeing some major differences and converting, so I apologise if this question seems simple. I’m running the latest ...
0
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1answer
116 views

Permissions of CIFS Mounts

I have some sensitive data on a network share hosted on a Windows machine (drive D on mymachine.mywork.com) that I need to mount, as follows: sudo mount -t cifs mymachine.mywork.com :/D /mnt Will ...
5
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1answer
799 views

Migrate an unprivileged LXC container between users

I have an Ubuntu 14.04 server installation which acts as an LXC host. It has two users: user1 and user2. user1 owns an unprivileged LXC container, which uses a directory (inside /home/user1/.local/......
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1answer
2k views

Root is receiving “operation not permitted” error when trying to move a a users .bash_profile

This are the permissions on the RHEL5 machine: [root@server1 belmin]# ls -la | egrep '\.(bash_profile)?$' drwx------ 9 belmin belmin 4096 Sep 16 14:29 . drwxr-xr-x 40 root root 4096 ...
0
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1answer
287 views

Mysql Database files read access

Right now I'm trying to set read access to the files of one of my databases. I'm using debian with basic mysql installation so the database location is /var/lib/mysql. I want /var/lib/mysql/...
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1answer
962 views

Samba share open for all to all

thanks for viewing at this question. I have a CentOS 6.5 server with a share that is and should be accessable for and from everyone. All content placed on that share should be accessable by everyone. ...
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1answer
1k views

How to add sftp permission to user/client?

I am somewhat new to linux, so please bear with me... I'm on a new Centos 7 setup. So far I have logged in via ssh as root: added a new user gave user full permission via visudo added user to the ...
2
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1answer
38 views

search files using group permission

If i need to search files using group permission I use the following command echo **/*(AIE) where AIE stand for read/write/execute. For owner and group permissions the qualifier used are rwx and ...
5
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1answer
3k views

Provide sftp read/write access to folder and subfolders, restrict all else

I need to provide user access to Ubuntu 14.04 Server, only limited to certain folder. To enjoy the ssh security and not to open up new service and ports (ie, ftp), I'd like to stick with sftp. However,...
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2answers
248 views

What UNIX File permissions would be necessary for someone to GCC compile my .C program?

I have written a .C program and submit this file to someone in UNIX. However, I didn't change the permissions for the file, beyond whatever they were when it was created. I am simply wondering if i ...
0
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2answers
78 views

How to make partitions with in /home/user/ writable by user?

I have a partition scheme like this: / /home/ /home/user/files/ When logged in as user, I cannot save any files at /home/user/files/. The only solution I can find is to create a new subdirectory as ...
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1answer
1k views

Create files that both www-data and myuser can edit

I have a directory to store invoices - drwxrwxr-x 2 me www-data 49152 Sep 9 13:38 invoices There are two applications that write files to this dir. PHP web application -rw-r--r-- 1 ...
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2answers
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New user can't access their home

So I'm adding a new user on a machine to give a family member some remote storage. After setting up their login and home directory. Here's the stat File: `/home/heather' Size: 4096 Blocks: ...
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2answers
1k views

How to give sftp access to sub-directory only not to parent

I want to give SFTP access to user tom for directory /var/www/html/my_project/. while I don't want to give any SFTP access to directory /var/www/html/. currently /var/www/html/my_project/ and /var/...
0
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1answer
1k views

Unzip (Info-ZIP) Permissions

Is there a way to invoke unzip (from Info-ZIP) on a Linux system without having it restore the permissions stored in the zip file? The zip files I'm restoring are enormous, so going back over the ...
0
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2answers
39 views

How to give rights to user on server to use programs

I installed a bunch of applications via SSH on a Debian Wheezy server. Now I want to give one extra developer rights to use one folder. I added her to a new group "myappdevs" and gave the group ...
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0answers
34 views

After restoring a backup my permissions seem to be borked

I made a complete backup of the system with "rsync -aAXv", and set up my encryption. After restoring everything, and booting up and trying to login, openbox didn't want to start, and "startx" didn't ...
3
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1answer
645 views

chroot into a sshfs folder

I am trying to chroot into a sshfs-mounted directory: mkdir remoteroot sshfs remote:/ remoteroot/ sudo chroot remoteroot/ but I get chroot: cannot change root directory to remoteroot/: Permission ...
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2answers
2k views

Can't write via FTP despite apparently correct permissions

I have the same problem no matter if I'm using pure-ftpd or vsftpd. In Debian Wheezy. The user can browse the directories in /var/www/foo, but when the file transfer is uploading I get '550 cannot ...
2
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1answer
973 views

How do I set up NFS to respect user and group permissions?

After creating an NFS share between two servers, lb1 (nfs-client) and data-server1 (nfs-kernel-server), users with permission on the NFS server do not have access on the NFS client. data-server1 ...
2
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1answer
110 views

Confusing Directory Permissions

Environment Ubuntu 14.04 LTS Desktop Permissions /media/gal_db$ ls -al drwxrwx--- 6 admin shared_disk 4096 Aug 15 13:31 . drwxr-xr-x 6 root root 4096 Aug 13 12:54 .. drwx------ ...
0
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1answer
32 views

Convenient way to upload a file to a server's application directory?

I very often need to upload some kind of file to a server, to put some application directory somewhere. Since my user account is of course unprivileged, I generally have to do this: scp file.txt ...
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1answer
371 views

How can I write to my Samba share?

There are a million versions of this exact question out in google land but I've been unable to solve my problem (sorry). I have created a Samba share on Ubuntu 14.04 (actually xbmcbuntu) that I can ...
0
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1answer
52 views

How to group alphanumeric permissions

As an addition to my previous question: Which is more widely used: chmod 777 or chmod a+rwx. If I were to use the chmod a+rwx (which I wouldn't in the real world) format, but I wanted to use the ...
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1answer
46 views

Is there any useful purpose for directories with permissions -w-? [duplicate]

Being aware of this answer I wonder whether there is any useful purpose for write-only directories, i.e. directories with permissions -w-. Any directory-"writing" operation I know of (such as creat, ...
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4answers
75k views

Which is more widely used: chmod 777 or chmod a+rwx [closed]

Out of the two options to change permissions: chmod 777 file.txt chmod a+rwx file.txt I am writing a document to send out to our customers, detailing that they need to change the file permissions ...
17
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1answer
481 views

Tracing executable without read permissions

I found some surprising behavior on Ubuntu 14.04 when using strace on an executable, which I do not have read permission on. I wonder if this is a bug, or if some standard mandates this obscure ...
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1answer
147 views

Two users, full access to same folder

I have a laptop running Arch Linux, and an owncloud-client. I have an owncloud server on my local network. When outside of my local network, I must use a dyn dns URL to get to my server. When on the ...
2
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1answer
143 views

What permissions should I set for an executable I'm likely to share?

I'm writing a bash script that does a little house-cleaning for me (clearing the log files from any Rails projects in the current directory). I'm making it executable, and I'm not sure what best ...
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1answer
330 views

Limit access on external drive mounted and used by sftp

I've got a unix user "popolo" who is chrooted in /srv/ftp/ and I mount my two external drives by /etc/fstab in /srv/ftp so I have /srv/stp/dude and /srv/ftp/sweet. Popolo has access to those drives ...
6
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1answer
3k views

Why do I get “Permission Denied” errors even though I have group permission?

I'm trying to run a game called "Dofus", in Manjaro Linux. I've installed it with packer, that put it under /opt/ankama folder. This folder ownership (and for every file inside it) is root user, and ...