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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Applying different permissions to files vs. directories

Sunny answered the question above in this post, The answer was given as No need for scripts. // Directories: find . -type d -exec chmod XXX {} \; // Files: find . -type f -exec chmod ...
2
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1answer
345 views

Why doesn't setuid not work? [duplicate]

I want my program can only be run by user xyz using root privilege. So I set setuid with: chmod u+s program1.sh ls -l program1.sh rwsr-x--- 1 root house 1299 May 15 23:54 program1.sh And I let user ...
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0answers
481 views

Save motion output videos in USB Drive

I'm using a USB drive in my Raspberry to store my website. Now I want also save my videos made with motion. I wasn't able to save in a folder different from /tmp/motion so googling I found I had to ...
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3answers
193 views

Reverse a chmod command on a directory

Is there a way to undo a chmod command on a directory in CentOS ?
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2answers
81 views

Misuse of go-r *

I am working on a test server. Was logged in as root and issued cd / chmod go-r * I certainly revoked the write permissions for the users that I had created. Did I revoke the permissions (r/w/x) ...
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2answers
1k views

Find all directories, in which user has access to search and echo this directories in shell

I need to find all directories, in which user has access to search(command find) and echo this directories in shell. USER is read from ksh. for example: read user I know, if user want to use find ...
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2answers
284 views

Unable to access a folder through group permissions

In order to secure data on my webserver, I have moved the PHP includes to a folder called /var/www-includes (outside of /var/www, the server root). I also ran chown root:wwwadmin and chmod 770 on that ...
4
votes
1answer
658 views

chmod does not change permissions of certain directories

System file: ext4 I changed the owner of files to apache: with the command: chown -R apache: wp.localhost Then, I could not change the permissions of directories in wp.localhost nor the ...
2
votes
1answer
5k views

Why can I not chmod a file?

[nathanb@ka /x/sim/nathanb/nbsim1] ls -al ,nvram -rw-r--r-- 1 root root 2097152 Jul 5 2011 ,nvram [nathanb@ka /x/sim/nathanb/nbsim1] sudo chmod a+w ,nvram chmod: changing permissions of ...
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2answers
742 views

How to exclude hidden files in recursive chmod?

I am having to do chmod -R 755 some_dir where 'some_dir' contains '.git' folders. Is there any way I can exclude hidden files and folder when doing recursive chmod? Note: chmoding .git folder is ...
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1answer
1k 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 ...
3
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1answer
592 views

How to let a user execute a script owned by root? Setuid doesn't seem to work anymore [duplicate]

I have some bash scripts that I use with the user 'root' to manage iptable rules. The problem is that I want these things at the same time: The script must be owned by root Permissions must be 700 ...
3
votes
2answers
111 views

Accidentaly changed the permissions in / [duplicate]

Accidentally did : chmod -R 777 / Now, RHEL 6 is not booting up. What do I do? I have a DVD and can go into rescue mode. Can someone explain how do I reset all the permissions ? Update ...
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1answer
98 views

chmod 600 fails silently

Here is what happens: $ chmod 600 foobar.txt $ ls -l total 1 -rwx------ 0 sampablokuper sampablokuper 13 Feb 19 21:00 foobar.txt Why is the last line not reading as follows? -rw------- 0 ...
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1answer
266 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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0answers
15 views

Restore system with no execute permissions for bash and chmod [duplicate]

Good day everyone! One of my friends asked me a question: how to restore an unbootable Linux system (let it be CentOS or whatever) in the following situation: no execute permissions for bash no ...
0
votes
1answer
63 views

Explain the “@” symbol in this permissions example [duplicate]

I have a file on my Darwin system and the permissions are: -rwxr-xr-x@ User: read, write, execute Group: read, execute Other: read, execute What is the 11th notation the @ mean? In addition to ...
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1answer
73 views

Putting two accounts in group not giving read access to group members

I have an Apache based web site and am trying to allow the user to upload files to a drop box on one machine and then have them transferred to another. So I form a group for two users: www-data which ...
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5answers
7k views

Can't apply chmod to a file

I have a file on my HDD, cd /media/celebisait/5AC69788C6976355 There is my file called myFile.tar.gz. I do als -l, -rw------- 2 celebisait celebisait 1387745311 Jun 6 2013 myFile.tar.gz ...
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2answers
85 views

How can I give a permssion to all users for a path using the octal notation?

I'd like to give execute permissions on a path recursively so I can read a file in the directory. The chmod binary that I'm using on Android only supports the octal/numeric notation though. Normally ...
3
votes
1answer
213 views

What is chmod 6050 good for

Recently I came across to command: chmod -R 6050 /usr/lib/hadoop-yarn/bin/container-executor I don't know what that mean? I know file permissions like 777 etc. in a mode rwx for owner group others. ...
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3answers
920 views

How to compact a chmod UNIX command

Is there anyway to compact the follow UNIX command: chmod 755 scriptA.ksh | chmod 755 scriptB.ksh | chmod 755 scriptC.ksh | chmod 755 scriptD.ksh The above command makes every KornShell (ksh) ...
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2answers
348 views

How to modify the permission of jar file exactly same as other machine jar file? [duplicate]

I have two machines, In my machineA I have a jar file with these permissions - -rwxr-xr-x 1 cronus app 16758150 2013-03-19 13:35 exhibitor-1.5.1-jar-with-dependencies.jar In my another machineB, I ...
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3answers
293 views

restrict student account permissions, give faculty access

I have set up two user groups, students and faculty on Ubuntu 12.04 and created a number of students and faculty accounts. The problem is a student can currently see & read all of the files of a ...
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2answers
177 views

Make script executable from vi/vim

How can I run chmod +x on the script I'm creating in vi/vim so that it is executable? I tried :r chmod +x % but it didn't work.
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0answers
128 views

MySQL Backup folder permissions - Non downloadable by others

I created a PHP script which takes backup of the mysql database every day and then saves it to a folder called "BkPath". All the backups will be saved here. But am trying learn the chmod command to ...
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1answer
4k views

how do I mount a CIFS share so I can fully control the mounted volume on the client

It's a simple question: but I am in much pain over this situation, so here is the question: How can I "mount" a share so that a) the share is run on boot b) that I can control things like chown/chmod ...
2
votes
1answer
99 views

How to copy permissions from owner to others using `chmod`?

Is it possible to recursively copy the permissions of owner to group and others for all files in a given directory? PS: my chmod is 5.97
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4answers
4k views

permissions 755 on /home/<user>/

I am wondering why by default my directory /home/<user>/ has permissions set to 755. This allows other users to enter into directories and read files in my home. Is there any legitimate reason ...
4
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2answers
869 views

Chmod by Letters Vs Numbers

I was recently asked by a colleague to use chmod with letters instead of numbers. Apart from the obvious readability advantage is there any particular reason to use letters over numbers ?
2
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2answers
2k views

Unable to run 'sudo chmod +w /etc/hosts'

I am logged into my remote VM (running out of ESXi) as user xyz. I wanted to change my /etc/hosts to add some network names that were not visible by default. I first tried to run sudo vi /etc/hosts ...
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2answers
890 views

Executable located in location A how to run it in location B?

So, I've an executable in my debian server and this executable located in /home/human/ExecuteIt, still i cant figure it out how to run my executable in another location. In my case it is ...
1
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1answer
45 views

trying to search inside chmod with command [duplicate]

I am trying to find commands with the word "symbolic" inside the contents If I type man chmod and /symbolic you can see that chmod command has the line of "new modes of the file will ...
2
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3answers
489 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 ...
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1answer
406 views

Equivalent of full control, modify and write in linux

What is the equivalent of assigning Full control, Modify and Write permission, in Windows, to a particular user and group, in Linux? chgrp, chmod and chown seems quite limited in this case.
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2answers
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Is there a flag corresponding to x/X, but for s with chmod on Linux?

When using chmod (in my case part of coreutils 8.12), and recursively setting the x bit, there exists the convenient X (uppercase letter x), to set the bit only on directories. So if you wanted to ...
2
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2answers
727 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 own group. Any user can ...
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2answers
105 views

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: ...
4
votes
3answers
3k views

How can I revert a chmod on the etc directory?

I accidentally executed the following command on the etc directory: sudo chmod -R 700 /etc I know that I have done something very wrong. My terminal now prints: I have no name!@ubuntu: /$ How ...
2
votes
3answers
411 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 ...
7
votes
1answer
3k views

Is NTFS under linux able to save a linux file, with its chown and chmod settings?

I'm having some doubts about how to install and allow linux to correctly read/write to a NTFS formated harddrive used as backup of various machines (windows included, that's how I need NTFS). For now ...
6
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4answers
2k views

chmod recursive permission on thousands of files

This is a more general question about 'chmoding' recursively. I have this script which at some point needs to change the permissions recursively in a folder which has a few hundred thousand files. ...
0
votes
1answer
34 views

how to display I/O file on shell [closed]

I am writing shell script and I need to display my output at the same time however it doesn't work with 2> somefile.txt and if I do | tee -a somefilel it will not overwrite which I need to . <> ...
1
vote
1answer
305 views

Permission error to access mounted directory in localhost

OK, I formatted my flash to ext4 file system, changed all the permissions to 777 and mounted it to /var/www/html/web. Now, when i access localhost/web it gives the following error: "You don't have ...
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1answer
243 views

Changed file access to read only but I can still write to the file. Why?

I am running a small embedded system built using buildroot. I have come across this strange behaviour when trying to set up my file permissions on the target device. To illustrate what confuses me I ...
0
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1answer
74 views

Removing access privileges to backup while maintaining current setup

I have a giant directory, and I am dealing with a backup. I would like to store this backup in as safe of a way as possible. One of the ways of doing that is removing rwx privileges through chmod. ...
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1answer
1k views

Safe to change owner of OS X system folders?

I'm trying to get Homebrew to work. That program's diagnosis tool gives me these suggestions: You should probably chown /usr/local/etc ... You should probably chown them: ...
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votes
2answers
3k views

Unable to change permissions of file system root

When I write ls -la the output is : tusharmakkar08-Satellite-C660 tusharmakkar08 # ls -la total 88 drwxr-x---+ 10 root root 4096 Apr 18 19:43 . drwxr-xr-x 4 root root 4096 Mar 18 17:35 .. ...
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1answer
133 views

chmod allowing write when I am not setting it

I've got a perl script which systematically changes permissions. The first thing the script does is remove all permissions. It does this by calling chmod(from perl). I did this as I found the set guid ...
5
votes
4answers
1k views

recursively chmod

I was trying to chmod folders and files with: find . -type d -exec chmod 755 {} \; find . -type f -exec chmod 644 {} \; But I was wondering: How to do it in one line using find and excluding the ...