chmod (short for change mode) is a Linux / Unix command used to change permissions of files and directories.

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chgrp and chmod not working in cygwin (windows 8)

I work in "C:\Users\leyou.ssh" I need to chmod id_rsa to 600 as it's currently 644, but it has no effect. Hence I tried "chgrp Users id_rsa" but it doesn't work neither and the group remains as ...
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cygwin's chmod behaves as working, but it does not work

My Cygwin installation is behaving strangely: chmod does not work. [09:45 Administrator@DellIns14 ~] > ls -ls /usr/bin/chmod 64K -rwxr-xr-x 1 Administrator None 38K Feb 6 2012 /usr/bin/chmod ...
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I am unable to change permissions of files in my home directory(NIS)

I am unable to change permissions of files in my home directory. For example: Here /home/user1 is the home directory of the NIS user which is mounted from netapp filer. user1@localhost ~ $ pwd ...
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20 views

Granting full rights on all files (owned by su) within certain directory

I got some trouble with a server situation, where i keep some configuration files in a sub-directory of a web project. Using my superuser account, i make changes to these files, which NetBeans commits ...
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19 views

vsftpd and persistent errors

I'm configuring a ftp user using this : useradd mz -d /home/ftp/mz -s /bin/false then check password: passwd mz and setting permissions chmod -R 777 /home/ftp/mz and changing owner chown ...
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25 views

How do I do undo chmod /usr/bin

For some reason I was messing around and did chmod -x /usr/bin/* (no idea what I was thinking) Is there a way to fix this, because at the moment nothing is executable
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44 views

Disabling chmod for some users

In Linux system, assume that there is user 'A' (non-root user who has ssh login permission). 'A' owns an executable file "A.out". I want to allow 'A' to read/execute "A.out" However, I don't want ...
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6answers
76 views

Give execution permission to directories but not to files

I have a directory structure with files and directories and I like to assign permissions so all the files and directories have read-write permissions for the user and read permissions for the group ...
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1answer
58 views

Linux permissions, mv is denied

I have the following structure (property is in the form user:group, user A belongs to both groups A and B, user B is just in the B group) : + dir1 rwxrwxr-x A:A + dir2 ...
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1answer
34 views

chown all files of removed user (symlinks)

I migrated my OSX System from one machine to another. Everything works fine, but when I check the files under /usr/local, they now belong to a user 502, not my newly created user (which has the ...
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41 views

Why does 'cd' not work on an entry with 'directory' attribute?

My OS is fedora 20. I act as a root user. under / directory, I input: #ll ... d????????? ? ? ? ? mnt ... #cd mnt bash: cd: mnt: Not a directory #chmod 777 mnt chmod: cannot access 'mnt': No such ...
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25 views

Under what circumstances can I not make a file world readble on linux

I'm trying to set some files world readable sudo chmod 664 *.ogg however the files still have permission -rw-rw---- after the operation. These are phone calls recorded from Asterisk - if that ...
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1answer
81 views

Unable to retain any root created files and folders after warm reboot in linux

I installed and ran petalinux on zynq board. It runs perfectly fine and boot in around 3 seconds. To boot it this fast I had to do some configuration before compiling the source. The problem that I ...
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2answers
453 views

How to add +x just for user with chmod?

chmod +x file changes a file from rw-r--r-- to rwxr-x-r-x but really I only wanted rwx-r--r-- is this possible?
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169 views

CentOS $chmod a+w /etc/sudoers command not found

I am very new to CentOS and I am trying to edit my sudoers file. First I am told to run the following: $chmod a+w /etc/sudoers and right away I hit an error: bash: a+w: command not found What ...
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29 views

backupninja osx files must be owned by root

I have just installed backupninja with Homebrew, but when I'm trying to run any ninja script I receive an error: Mar 03 14:38:24 Fatal: Configuration files must be owned by root! Dying on file ...
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1answer
53 views

Possible to mount an NTFS partition with uid=1000,gid=1000,dmask=022,fmask=133 but allow files to later be chmod'd?

This is for a single-user system that's using an NTFS partition as its $HOME; is it possible to mount the partition in such a way that New files would be owned by $USER:$USER with 644 permission ...
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24 views

list out owned file/directories and change its permissions

Can anyone please tell how can I change files/directories owned by me only. below is the command that list out files/directories owned by me find . -user <username>
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2answers
82 views

How do I change permissions on a directory

I'm using CentOS and I would like to know how to change permissions on a folder with multiple files in it. I have used the following commands on the folder as root (Let's say folder =A) : chmod ...
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1answer
12 views

Why am I still able to write to a directory after I have changed permissions at the terminal?

I am running Mac Os 10.9 and connecting to a Mac OS server (10.8?) over our local network where I have an admin account. I regularly sync 3 directories from my machine to the fileserver using rsync. ...
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1answer
81 views

Force file and sub-directory permissions on OS X server

We have an OS X development server at work for five developers, creating mainly Symfony2 based websites. Out of the five only two of us are in the sudo group, meaning if the others had issues with ...
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1answer
21 views

OpenVPN CA Certificate creation error

When doing ./build-ca I'm getting a weird error and I cant find any information about it, been stuck with this error for hours. I'm doing it as SU and SUDO and neither work. This is the error I'm ...
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4answers
117 views

Is there any harm in converting all files to executable?

I wanted to install certain software. The package had lots of files including some shell scripting files. Initially I had to select some files and then make it executable: chmod 777 shellscr1 but ...
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118 views

OSX how to chmod a mounted AFP folder from NAS

I have mounted a drive from my DLINK DNS 320 Nas onto my Mac Mini 10.9 via AFP. One of the subfolders where I usually store photos (named '2013') is currently showing restricted access permissions, ...
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70 views

Permissions of files/directories in Unix

It appears that each file/directory has a given set of permissions shown by the 10 characters to the far left of each listing if one were to type into the terminal ls -l Considering that you can ...
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1answer
58 views

How to delete file with no write permissions for any user?

I find myself in a strange situation where a script wrote files with the following permissions: -r-------- 1 user1 user1 file1 Dec 24 14:53 -r-------- 1 user1 user1 file2 Dec 24 14:54 -r-------- 1 ...
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1answer
191 views

Changing permissions (read-only) for specific user for specific folder and sub-folders/files in RedHat?

Question is about user permissions in RedHat. How to give read-only permission to specific user just to read a specific folder and its sub-folders and files? How can I do it? I've tried: chmod a+r ...
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139 views

What is this hidden directory doing on my Desktop?

On my Mac I just encountered a hidden directory on my desktop. I don't recall putting it there. When I type ls -la in Terminal on the desktop I get the following: The last folder is what triggered ...
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1answer
249 views

Permission denied altough chmod 777

I am running following commands: $ ls total 12K drwxrwxrwx 3 szr szr 2.0K Nov 14 12:08 . drwxrwxrwx 12 szr szr 2.0K Nov 14 11:23 .. -rwxrwxrwx 1 szr szr 1.6K Nov 14 12:08 config.xml -rwxrwxrwx 1 ...
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81 views

Weird permissions getting set on directories after rsync

I've got a drive on a Mac (OSX 10.7.5) that I'm sharing on the LAN. In the system preferences, the share is set so System Administrator has Read & Write access, System Group has Read Only, and ...
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2answers
209 views

Restrict user access to only read from /proc

As a method for setting up some bare-bones systems monitoring, I have a script set up to SSH in, and run some basic shell commands, reading some files in /proc. I would like to create a specific user ...
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108 views

Linux directory permission inheritance for new files created

ive following folder drwxr-xr-x 7 root root 45056 Nov 25 12:39 data which include sub dirs and files its all 755 , but when i create new file inside these dir its get permission -rw-r--r-- 1 ...
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1answer
555 views

Automatically chmod a file when doing git add?

I have an ubuntu development system using git to manage files, but I like to do my editing in QTCreator on a different (windows) system, so I have a windows network drive mapped to the ubuntu server. ...
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1answer
36 views

simple priveleges/chmod setup doesn't work

here is the directory listing: drwxrwSr--. 31 storage storage 4096 Nov 20 23:12 storage id returns uid=501(peter) gid=501(peter) groups=501(peter),504(office),505(www),506(storage),507(media) ...
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81 views

chmod with extended ACLs

When setting the permissions on a file that does not have extended ACLs set, the 'user', 'group' and 'other' permissions are set. This can be seen with getfacl: $ touch testfile $ chmod 600 testfile ...
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230 views

Unable to change access permissions on external ntfs Harddrive

I am fairly new with Linux when it comes to mounting hard drives, so hopefully this is a simple question. I recently purchased a 3TB hard drive that would have read/write access with both Mac and ...
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63 views

CentOS: How to prevent a user from executing an application installed in a specific directory

I have an application installed in /etc/mydir. I have executed the following to remove the ability for users to execute this program. chown root:group1 /etc/mydir -R chmod 700 /etc/mydir -R I ...
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1answer
82 views

Why in Midnight Commander the chmod has 5 digits and what for?

In the file menu if I go to chmod, it returnes the chmod value for the folder / file. I understand the last 3 digits, the second is setuid/setgid/sticky bit (have read the docs on it but its use is ...
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2answers
736 views

What does the command “chmod a=w g+x alpha” do?

I was asked this question but didn't know what it does. I know chmod and its usages but what does this exactly do ?
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2answers
118 views

chmod 700 -R ~ - is it safe?

I'm thinking of doing 'chmod 700 -R ~'. Can it be dangerous? What can happen what I don't expect? Also, is there any way to keep all files on $HOME to be -rwx------?
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26 views

What should I do to secure, chmodly wise, my server?

I want to let my friend access my server so he can host his website. Let's call him Joris. # useradd joris note that I'm Debian. So now a /home/joris has been created. This is cool and all. BUT. He ...
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3answers
170 views

Add read permissions to all the directories of a path

I want to add (not modify other file permissions) for all the directories in the path written bellow. Something like chmod -R xx4 /home/mDB/admin/KNUCKLES/dbs/ The path /home/mDB/admin/KNUCKLES/dbs/ ...
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1answer
289 views

How should chmod and chown be used together?

I recently sold my mac, and before doing so I put its files on an external HDD. Now I'm using Linux to move those files to a larger HDD, but some folders still retained some residual mac permissions, ...
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68 views

Changing chmod flags back

I'm fairly new to the whole UNIX / command shell sort of stuff, so I apologize for any ignorance for something I am not aware of. And by new, I mean extremely new. I was confused by how to change a ...
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136 views

Convert ls -ld to chmod/chown commands

X home dir permissions: drwxr-xr-x Y home dir permissions: drwxr-x--x So my question is, how can i convert drwxr-x--x to a chmod/chown command so I can put the same permissions that Y has on his home ...
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140 views

Changing access rights of the specific folder for specifeid user

what is the exact analog of the following two commands in linux # chmod -R +a "www-data allow read,delete,write,append,file_inherit,directory_inherit" /path/to/moodledata $ sudo chmod -R ...
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465 views

chmod: I own the folders, but I can only delete the folder, not the files inside it

Hello I new to linux and i have searched about 10 hours for a answer without success. I have created a folder called "Datatank" and chmod 777 Datatank All files and folder inside Datatank can I ...
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1answer
1k views

chmod 777 no effects on Linux Mint

I'm trying to assign run privileges to a file named foobar using: sudo chmod 777 foobar However nothing happens. The file is located on a NTFS mounted partition. The mount command says: /dev/sda4 ...
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66 views

Can chmod 777 ubituitously replace the need for chown ?

Its clear to me that the chmod 777 command will make any file, theoretically, accessible/readable/writeable/executable/ by any user. But are there instances where, even with a world ...
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52 views

Setting LAMP server webpage files rights

Today I decided to fix web-server file rights. Did only a little bit of testing to see how rights work so sorry for sounding stupid. I have Apache web-server on Linux (LAMP) which has multiple users ...