chmod is used to change the commonly used read, write, and execute permissions on files. It can change these permission bits for the file owner, the file's group owner, and everyone else. It can also change the more esoteric ‘permissions’ (attributes, reall) like set-user-ID, set-group-ID, and ...

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47 views

Cannot Bash chgrp GROUP /home/*/SOMEFILE/ How to do it?

So am setting a code that will change group owner of the file to a specific group. PS there are more than 10 users, with same folder and file structure, and i want change the ownership of a specific ...
1
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1answer
23 views

Why is chmod recursively changing file permissions as well?

When I do chmod _+x -R /dir where "_" is any combination of (u,g,o,a), if after I do chmod g+X -R /dir, the files gain executable permissions as well. Why does this happen? This behavior only ...
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2answers
28 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 ...
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votes
0answers
13 views

Ubuntu Linux - PHP Cron doesn't work

I have a Ubuntu webserver that should execute a PHP script to cache a bunch of data every 5 minutes using a Cron job. I configured the Cron using Webmin entering the command: /usr/bin/php -q ...
3
votes
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: ...
3
votes
2answers
80 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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0answers
54 views

Ubuntu 15.10 system rescue on Busy Box after botched Deja-Dup backup attempt

I received an external hard drive for Christmas and attempted a backup of the home directory of my Ubuntu 15.10 system. Unfortunately, I botched it, and when I came back to the computer to check how ...
20
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4answers
11k views

Wrongly set chmod / 777. Problems?

I was trying to run chmod -R 777 ./ but ended up typing chmod -R 777 / and set 777 on my entire machine. What can go wrong? How can I fix it?
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1answer
26 views

How do I achieve this task of creating a shared folder and controll newly created files [duplicate]

I am attempting to conceptualize how to go about solving this task. First, here is the task in full. RHCSA7: Task of the day Allowed time: 10 minutes. Create two new user accounts "steve" and ...
0
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1answer
28 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
votes
1answer
38 views

trouble understanding GID and chmod g+s

I am having trouble understanding the GID and the command chmod g+s I read this as setting the permissions of the passed file or directory, for the group, as +s (sticky im assuming?) Does the +s mean ...
128
votes
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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vote
1answer
38 views

How to give write / create right to not yet existing files w/o write access of the parent directory?

I don't know if this is even possible so I need to ask. I'd like to allow a single file to be created by a user (a flag-file) but only that file should be able to be created. As I have the parent ...
1
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0answers
29 views

rsync + chmod only selected files

I'm trying to sync specific cron files between 2 servers and change the permissions for them. However, the command I am trying is also changing the permissions on the main directory. Command used: ...
0
votes
1answer
26 views

Samba unix permissions messed up despite mask

I'd like to configure a share on a standalone samba serve where users have rw to their own files, but r to others in the same group (rwx and rx on folders respectively). It works well when users ...
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votes
2answers
39 views

Why would a user not be able to delete a file they created

Reposting the question about deleting a file. We have a script that is used to transfer files between two SCO Unix systems. The script has been rock solid for years. Recently the firewall unit at ...
0
votes
1answer
27 views

executable files to normal files via terminal CentOS7

Today I copied some files from the shared folder (Host is a Win7) to my VM ( Guest is a CentOS7). I did this with root permissions. Then I copied th files to my apache location /var/www/html/test I ...
1
vote
4answers
76 views

Why do I need to set some file as executable?

I never went outside of windows before last week, I was asked to make a VM with elasticsearch/logstash/kibana/jdk8 on it. I'm using a regular non sudoer user. I extracted each tar.gz file and got 4 ...
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0answers
28 views

ownCloud permissions wrong

I've got ownCloud running in a FreeNAS jail and it worked flawlessly until I rebooted the system. Now I get an error saying: The datadirectory (/media) is readable for other users. Change the ...
1
vote
1answer
29 views

SUID has no effect on directories with Linux

Why does the SUID bit have no effect when applied to directories in Linux? I clearly see that I can set it with 'chmod u+s'. But why does it not have "any" effect. What is the reason for implementing ...
1
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0answers
42 views

Permissions (ACL) to allow creation of new files only - are extended attributes also needed?

I want to use a directory as a sort of drop-off point, similar to the Public folder in each Mac OS X home directory, that is: certain users (or everyone) should be able to create new files inside this ...
6
votes
1answer
6k views

Difference between “chmod 775” and “chmod 2755”

What is the difference between "chmod 775" and "chmod 2755"?
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votes
2answers
81 views

Fix files with ????????? permissions

I wrote a script to change permissions on all files in a directory: #!/bin/bash files=`find "$1"` for f in $files; do chown "$2" "$f" chmod 600 "$2" done Obviously, the second argument to ...
1
vote
1answer
84 views

Directory permissions “r-s”, chmod 655 does not change to “r-x”, why?

I created a directory in my home directory. and I set its permission as follows: uhmwk.1.4$ chmod 655 dog uhmwk.1.4$ ls -l total 4 drw-r-sr-x 2 s9 s9 4096 Feb 14 21:57 dog why is the group ...
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votes
2answers
116 views

command not found error after giving permission to access file using chmod

I've been trying to run a script using chmod. Here's how I tried to execute the script: $ chmod u+x tester $ ./tester ./tester: Command not found. I always get the Command not found error and I'm ...
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vote
2answers
77 views

How to give this permission (-r--rwx-rw-) using CHMOD? [duplicate]

I am studying for a public exam and see this question (pt-BR) Before answer, I read about chmod and understood that the permission are split in 3 groups (user, group, other), like this: Nível u ...
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votes
1answer
49 views

Change Permissions for a Specific User

Im new here. I have a question about changing permissions of a file. We have user1 user2 user3 and we have a "xx" file. xx files remoting by root and group1. ı have to give a writable and readable ...
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vote
4answers
54 views

File permissions on data backups

After making a rm related mistake on some of my files (which was fine because I have backups), I started thinking on how I could limit myself to making such mistakes. I have not done anything with ...
0
votes
1answer
147 views

SSH Key Permissions Chmod settings?

I need to use SSH on my machine to access my website and its databases (setting up a symbolic link- but I digress). Following problem: I enter the command: ssh-keygen -t dsa To generate ...
0
votes
0answers
13 views

SSH Permissions in Linux Mint [duplicate]

I need to use SSH on my machine to access my website and its databases (setting up a symbolic link- but I digress). Following problem: I enter the command ssh-keygen -t dsa To generate ...
2
votes
2answers
3k views

Allow all group members to create directories and files

There are 2 users sftp_user apache Both users belong to the updaters group as well as other groups. New directories and files are created in the /updates/ directory. drwxrwsr-x 8 sftp ...
2
votes
2answers
27 views

Lock A Built-in Application?

I know I am able to lock an application using: sudo chmod a-x /Applications/'Application'.app but I encountered a problem while trying to lock an application, like safari, which is built in. ...
0
votes
2answers
91 views

How to recursively change permissions on all directories inside current directory?

How can I change folder and file permissions for all files and folders recursively inside current directory? I am not sure, why, but my command fails with this output: chmod: missing operand after ...
2
votes
2answers
415 views

Permanently change permissions of /var/run/postgresql

On Linux Mint 17.0 Cinnamon Edition, I want to use /var/run/postgresql as the unix_socket_directories option for all of my postgres databases. Whenever I run the command pg_ctl -D postgres-data -o ...
0
votes
0answers
30 views

What is the effect of rsync with -E and --chmod?

Reading through a script I came across an rsync command with the following flags: -rtlDE -c --delete-after --chmod=u+rwX,go-rwx /path/to/dir1/ /path/to/dir2/ Background: I am refactoring the ...
3
votes
1answer
10k views

I can't seem to remove a file even after changing ownership and permissions [duplicate]

Haven't been here much. Mostly Stackoverflow. Anyway, I have a file that I can't remove. I tried sudo rm files.db and got Operation not permitted Did sudo chown me: files.db Then sudo chmod 777 ...
3
votes
2answers
279 views

reset permissions back to default

How can I reset permission to default according to the mask, so they will have permissions set as the file was just created Example of what I want to achieve: umask is set to 0022 so touch file ...
3
votes
2answers
63 views

Changing file permissions according to their names

I created 512 files, with names made from combinations of permisions (r, w, x). I created them like this: touch ./{r,-}{w,-}{x,-}{r,-}{w,-}{x,-}{r,-}{w,-}{x,-} and I want the files to have same ...
12
votes
3answers
7k views

chmod + silent mode + how force exit code 0 in spite of error

Is it possible execute chmod and ignore error from command Example ( remark file.txt not exsist to show the example ) When I type chmod 777 file.txt I get error on the output chmod: cannot ...
0
votes
0answers
19 views

How to give write access for overlay fs?

Should i change rights on mount point, or workdir or both? Should i use commands (to give write access for all users) find . -type d -xprint0 | xargs -0 chmod 777 find . -type f -xprint0 | xargs -0 ...
2
votes
2answers
11k views

assigning read/write privileges for a folder to a user in CentOS 7

I am logged into a CentOS 7 server as root. I created a folder /somefolder. I want someusername to be able to write to that folder via scp from a remote computer. What command should I run so that ...
0
votes
1answer
5k views

What does “execute” permission on a folder means? [duplicate]

I have read this topic, which gave me some info but I feel I am not fully getting it. What does the execute permission actually means on a folder? I fully understand what it means on a file, but on a ...
0
votes
1answer
20 views

Help with permissions

I am trying to set up permissions but i dunno what excatly as a user. Could anyone tell me which permission will allow me to execute the touch and echo command in a directory ?
20
votes
7answers
14k views

Is there a web based converter between rwx and the octal version?

I can never remember what the conversion is from something like rw-r--r-- to 644. Is there a simple web based converter between the 2?
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vote
2answers
389 views

File Permissions Sticky&User Execution

After the website of a client has been hacked, I found some files with the following permissions set What exactly S and T stands for? Also, which one is the command to set them with those ...
1
vote
1answer
39 views

vsftp doesn't respect chmod setting when uploading outside my local network

Yo! I've a ftp server on my linux machine and I've set the following rules: I keep group and owner and chmod it to 775. When I use it at home (192.168.x.x) it's ok, files keep their group and user ...
1
vote
1answer
140 views

Linux Copy user's permission to another user

The server is centos, the user is named dev_admin. Now I added a new user ops_admin and I want to copy dev_admin's permission to ops_admin. I tried the following command as root: useradd ops_admin ...
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votes
1answer
37 views

Unix directory for all users permissions

I'm trying to make a directory where all users can write, but no user can delete another users file in that directory.
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votes
1answer
107 views

How to convert text into numbers for chmod? [duplicate]

I need to chmod something into drwxrwx---. What is drwxrwx--- in number form?
2
votes
1answer
67 views

Is it a good idea to set file permissions to 640 on windows partition?

I run both Arch Linux and Windows 10 on my computer. When I cd onto the Windows partition (which uses NTFS), I notice that all files and folders have 777 file permissions. I want to run $ chmod 640 -R ...