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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python && unix permissions (gitlab) [closed]

I have directory /home/git/repositories with rights 770 and uid=git,gid=git user1@gitserver:~$ ls -la /home/git/ | grep repo drwxrws--- 42 git git 4096 Jun 30 17:02 repositories I have user ...
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To Rsync files where permission denied

I want to find those files which I cannot copy to another location such that I could do Rsync. I have an external HDD and my system´s HDD. The external HDD has files which my system is missing. I ...
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1answer
61 views

What are the default file permissions in CentOS?

What are the default file permissions in CentOS 5, CentOS 6 and CentOS 7? Is there any difference in the default file permissions between these OSs?
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138 views

User has write permissions but cannot write to files

I am using a python script to write (and sometimes overwrite) data files. I can write new files just fine, but am getting permission denied when trying to write to existing files. What's strange is ...
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541 views

Which group should own /var/www/html?

I have a CentOS 7 VM setup on my Windows 7 host. I have installed vsftpd and ftp and can now successfully connect from the host with FileZilla, but the user I log in as doesn't have permissions to ...
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148 views

Getting 'Forbidden error' browsing a page in localhost with permission to read, write and execute

I guess there's something I'm missing here but I need to solve this in order to feel confident while learning how unix/linux OS work. I've seen some similar questions on this topic but I don't think ...
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3k views

How to Change Owner of a Directory

EDIT: The problem was that Apple uses permissions to mark backups and prevents you from modifying them (probably a security feature). By using chmod -RN <dir> I removed ACL data from all the ...
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91 views

Stat substitution command to capture numeric file permission in Solaris 10

There is no stat command in Solaris 10. Is there any way to get numeric file permission?
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339 views

Starting Apache Httpd at Boot time with Zero intervention, CentOS and authbind

I want to start Apache Httpd when Linux starts (with Zero intervention like submitting the root password, I don't want write the root password to start the apache service!!!) Later of Apache was ...
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1k views

Allow certain guests to execute certain commands

I would like to create a new user on some of my Debian/Ubuntu hosts that is able to update the server using the commands apt-get update and apt-get dist-upgrade, but I do not wan't to give them full ...
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97 views

Peristent LiveCD: Allow user to write-access to usb key

Using kubuntu liveCD in persistent mode, I'd like to allow user to write on boot usb key (to put data out of "casper" file). USB (root) is auto mounted in /cdrom kubuntu is "main" user (uid 999) ...
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Why can't I view a folder in the Files navigator, when permissions are 766, owned by me?

I have the following mounted drive: caleb@ubuntu-box:/media/data/plex$ ll total 20 drwxrwxrw- 5 caleb caleb 4096 Jul 11 13:29 ./ drwx------ 3 caleb caleb 4096 Jul 10 19:48 ../ drwxrwxrw- 4 caleb ...
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Cannot change ownership of folder owned by nobody

After a forced reboot a particular folder in my home directory is owned by nobody. I am trying to change that to root but I get the following chown: cannot read directory ‘databases/’: Permission ...
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22 views

New files in a mounted directory are being created with a different user and removing write permission for other users

I am running a python script that outputs files into a mounted directory on a different computer. The script can be run multiple times in a way that overwrites the contents of created files. However, ...
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164 views

Why am I able to write a module parameter with READ ONLY permissions?

I wrote the following simple linux kernel module to test the param feature: #include<linux/module.h> int a = 5; module_param(a, int, S_IRUGO); int f1(void){ printk(KERN_ALERT "hello ...
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36 views

Linux RPM installation - Who defines the rights?

I am new to Linux, and I am using rpm -i to install an RPM package successfully. However, I do realize that I have to use the root account to install the package every time. I have several users in ...
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75 views

Apache Tomcat and Httpd - Sharing common web publication folder - CentOS

Suppose: The Httpd's Web publication folder is assigned according: Edit /usr/local/httpd/conf/httpd.conf file: DocumentRoot "/usr/local/WebFiles/Html" <Directory ...
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File permissions for kernel have changed in OSX Yosmite, why?

I am working my way through the book Learning Unix for OSX Mountain Lion (I don't have access to the updated version for OSX), in which it demonstrates that using $ ls -l /mach_kernel should ...
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153 views

Why can't I write to my ext4 partition even with 777 permessions?

When I touch a new file for example I get: touch: cannot touch 'file': permission denied It is a partition that is mounted in the /media directory on demand. I am the owner and I've had it's ...
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Purpose of permissions such as 0111 or 0333

What is the purpose of Linux permissions such as 111 or 333 (i.e. the user can execute, but cannot read the file), if the ability to execute does not automatically imply the ability to read?
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What is so special about Linux permission 004?

I was reading Practical Unix and Internet Security, when I came across the following lines which I couldn't comprehend. If you are using the wu archive server, you can configure it in such a way ...
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15 views

Configuring Samba to serve Unix-style files (e.g. owners, permissions)

I just learned that Apple has deprecated its own AFP network filesystem in favor of SMB2. I have looked, but can't find any solid information on how its handling of SMB2 implements Unix-style file ...
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47 views

Owners and groups of everything inside /var are changed mistakenly [duplicate]

I have recursively changed owner and group of /var to root:root. I have mistakenly ran following command while standing in /var. I thought I was in /var/www, sudo chown root:root . R Now many ...
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62 views

normal user runnig a bash script containing root command without password

I have a bash script that contains few commands that can only be run by root, e.g. wpa_supplicant. I would like to allow the normal user to run the script without sudo. I found these posts but they ...
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1answer
85 views

How does file system permission behave on different systems sharing an NFS export?

I'm familiar with how Linux permissions work on a single machine, but what happens when a directory is shared (specifically via NFS)? Also, what happens when two users are seemingly the same (same ...
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194 views

Using find -perm to find setuid files

I want to find list of all suid binaries. I use the command find / -perm 4000 However this does not give me any output. I understand that the SUID file may be in 4xxx permission mode. But if I ...
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168 views

accidentally moved and fixed /bin/ directory, but now can't su

I accidentally moved my /bin directory to /usr/bin/bin, anyway, I managed to move it back to its place with # /usr/bin/bin/mkdir /bin # /usr/bin/bin/mv /usr/bin/bin / and then I was able to login ...
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security2_module module for apache is causing the “Forbidden You don't have permission to access / on this server” message

I installed the security2 module to my apache server by adding these following lines to my httpd.conf: <IfModule security2_module> Include ...
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648 views

Meaning of chmod 1775

Created a folder "Sample_dir" and analysed its permissions. $ mkdir Sample_dir $ ll Sample_dir/ total 36 drwxrwxr-x 2 user user 4096 Jul 1 19:26 ./ drwx------ 71 user user 28672 Jul 1 19:26 ../ ...
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25 views

Create permissions for group to write and files created by owner are only writeable by owner

I have created a folder, /hello: it has the following permissions: Owner = rwx Group = rwx Others = r and the folder is owned by john and belongs to the group sales. I have created another user ...
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2answers
88 views

What can I do to start a terminal in a X server at boot without giving away root priveleges?

The problem: I run Linux on an arcade machine with a monitor that accepts a 15kHz signal. I can't see anything until the X server starts and a modeline gets the GPU to output the correct signal. My ...
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TUI Tool to change directory permission rules?

There are some strangers to Linux who need to use it in terminal mode but they are helplessly limited to accept that using chmod and chown is dead simple. They would be satisfied only by a tool that ...
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How can I give the user sufficient permission to access '/' directory?

How can I get the following to work? user@host:~$ cd .. user@host:/home$ cd .. user@host:/$ echo " " > txt.txt bash: txt.txt: Permission denied user@host:/$
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20 views

Can't get server access permissions working

I am trying to get a script going that will move files in the apache webserver directory for me without sudo. In my mucking around I somehow got edit and move permissions working for user nhergert, ...
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31 views

APCUPSD script can't close program

I want to use APCUPSD to stop a program (called ns_image_server) which runs in a terminal window when it detects that power has been lost, to give that program time to close before the computer shuts ...
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1answer
90 views

Why does file-roller appear to have lower privileges than the user?

In Ubuntu I have a mounted Samba share. I have selected some files in a directory on the Samba share in Nautilus and attempted to compress them to an archive in the same location. File Roller tells me ...
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37 views

Directory Permission Order [duplicate]

In Linux, let us assume we have a directory with the following properties: drwx---r-x 29 user1 group1 4096 Jun 22 14:11 dir1 can I, as user2 having group group1, navigate into dir1? Since ...
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2answers
205 views

ACLs and classic permissions

I'm trying to set up a git server on my FreeNAS server. The problem I have is with setting up the permissions for different users/groups just as I want. Basically I have two different groups: ...
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357 views

Giving write permissions to www-data for a file within user's home with limited shell access?

I have an access to a remote server with ssh, but the access is limited: my account there, say UseR, can create files in /tmp and in its home directory, but not elsewhere; it can call chmod without ...
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98 views

Is it possible to change file permissions when copying

I have a directory with default ACL permissions that get copied to all files created in that directory, but only if they are created in that directory. Would it be possible to change the permissions ...
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1answer
168 views

Why and when does `lsblk` require `sudo`?

On my up-to-date Arch Linux, lsblk works fine without sudo: $ lsblk -o NAME,FSTYPE NAME FSTYPE sda ├─sda1 ext4 ├─sda2 ext4 ├─sda3 swap ├─sda4 └─sda5 ext4 sr0 $ lsblk --version lsblk ...
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1answer
33 views

Can non-sudoer modify anything outside of home directory

If a user does not have sudo privileges, can he/she create a file or modify any file outside of his/her home directory, and outside of any external media devices he/she might have connected to the ...
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119 views

untar error - Cannot change mode to rwxr-sr-x

I am trying to untar a .gz file , which is stored in the /root folder onto a directory in /mnt/flash2/example I use the following command - tar xzf filename.gz --no-same-owner -C /mnt/flash2/example ...
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1answer
48 views

User to run weechat over ssh

I want to create an account on my own server for a friend who wants to use weechat. I have created an account adduser friend and created an ssh pair for his login such that password login is ...
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1answer
201 views

User in the same group new/edit files permissions

I have a few users under the same group. However, when they all work on the same folder via winscp, whenever they open a new file, they open it with themselves, as the owner. Thus, when someone else ...
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591 views

How to recursively check if a specfic user has read access to a folder and its contents?

I need to pass a user and a directory to a script and have it spit out a list of what folders/files in that directory that the user has read access to. MS has a tool called AccessChk for Windows that ...
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2answers
74 views

In find -perm, what's the difference between “+6000” and “/6000”?

I'm trying to find all the setuid/setgid binaries on my system. I've found two different ways to do this online. What's the difference between find / -perm +6000 -type f and find / -perm /6000 ...
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1answer
52 views

How do you use 'find' to update ownership of all directories, files, and symbolic links in a folder?

I'm trying to update the ownership of everything in a directory tree from me to root. I'm using find to do it a little more carefully than a recursive chown. Here are the commands I use to change ...
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2answers
94 views

How to get rsync to complain if user not found

I'm moving files over from my old server to my new server. By the time I'm doing it for real (as opposed to just testing) I'll have all the "user" users (the non-system users, i.e. >= 1000) created on ...
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1answer
35 views

How to guard a set of folders from being written into by a specific process?

I would like to have a way in which a set of folders do not allow write access for a particular process. For example, I would love to have a way in which YUM/RPM is not allowed to write into /usr/bin ...