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

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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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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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cannot create directory. permission denied. but i have permission

i'm fairly new to linux, and ran ubuntu the other day. it is running dual boot with windwos 8. now, the problem is, even though i log in as root and give a specific folder ALL PERMISSIONS (#chmod 777 ...
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Shared hosting, stop user deleting .html file?

Hi guys I have set up a small shared hosting set up for friends. I have set the file chmod permissions to chmod 711 /home chmod 711 /home/testuser chmod 755 /home/testuser/public_html chmod o+r ...
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What do these chmod parameters mean?

What changes are being applied by u+s,o-rwx in the below? chmod u+s,o-rwx myUserGroup myFile
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Chmod 644 on /etc/ any way to fix?

I tried to tab complete something and I guess it wasnt there. I know you are not supposed to set the permissions to /etc/ like that, but my permissions seem to be all messed up. whoami prints out ...
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370 views

Why is group write permission ignored in Ubuntu?

I want my user to have full access to the local Apache root folder, and I also want the Apache user to have full access to the same folder. What I did was create a new group called DevGroup and I ...
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239 views

what do these permissions mean?

I did chmod on some files in Mac 10.7.3 and I accidentally entered the code 7744 instead of 744. The resulting permissions were: -rwsr-Sr-T After seeing this I reran chmod and fixed the ...
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Group permissions for apache

I've run into a problem with Joomla. . . it cant create new folders through the Admin UI. It's a standard permissions error. I've been told to chmod all of the folders in the site to 777. Is ...
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201 views

How do I give an admin user full rights to all home folders?

What is a good permission scheme for this scenario? user administrator (from administrator group) has full access (read/write/execute) to /home folder any other user (from users group, example: ...
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836 views

chmod on /System/Library/ in Mac Snow Leopard - Now Cannot Open Terminal

I was trying to run a command to fix a different issue, but when I cut and pasted the string there was a space in it and this is what was run: sudo chmod 000 /System/Library/ Now when I try to open ...
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526 views

CentOS chmod overiding set-group-ID?

I'm used to setting up SGID on a directory chmod -R g+s example and then chmdo -R 750 example And have the directory and all sub-directories preserve the set-group-ID. On CentOS SGID gets ...
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107 views

changed directory permissions of

So, I was changing some file permissions using gFTP, and somehow I managed to set the permissions of .. (idk how, last time I use gFTP) The problem is I was working in the highest directory I could ...
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11 views

tree will not descend into directories

I just unpacked a tar file with a folder in it. I did a tree -F and saw asterisks popping everywhere. All of the files (even png, txt, etc) were marked as executable. So I did what any sensible human ...
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104 views

Is it possible to disable chmod/chown from sudoers for these specific directories /usr and /etc?

There has been two occasions where I have accidentally chmod-ized 777 the whole direcotry of /etc and it has forced me to come to the decision that I'd be better off to do fresh installation of OS ...
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26 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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32 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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28 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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612 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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94 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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31 views

how to display I/O file on shell

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 . <> ...
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224 views

What unix permissions do I need?

I have a directory that hangs off root: /data/my/folder/here/ and /data/my/folder/herealso/ I wish all users to be able to write files to the here and herealso directories. But limit (as much as ...
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1k views

How to open a file with write access on OSX terminal?

I am trying to open private/etc/php.ini.default file to add detect_unicode = Off. But after opening above file with this command vim php.ini.default, it only opens this file as readonly. How can I ...
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366 views

Change owner of file without being root

I suggest that I have a log file with 666 permission and its owner is alice. So user 'bob' can change its owner by this: cp log log.temp; rm log; mv log.temp log So how can I fix this risk?
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135 views

Does “chmod -R 700 directory_1” update directories pointed by softlinks?

Does "chmod -R 700 directory_1" update directories under softlinks? Forexample, there is a softlink under directory_1 folder: "my_softlink". And my_softlink points to a directory_2. Will permissions ...
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281 views

Give the www user chmod permissions

Ive got a website (run on Ubuntu Server) that needs to modify and delete files, every now and again it comes across a file that it needs to run "chmod" on in order to perform it's operations. However ...
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810 views

No permission for ls drwx--x--x

Is there any way to see a tree of directories with a chmod of drwx--x--x ? I know I can manually check by bash script with if [ -d dirname ]. However it is not the solution I am looking for. Cheers!
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161 views

linux chmod causing crash

I needed to give write permission to file representing GPIO pins,out of curiosity i taught changing permissions of all files/folders,by mistake instead of doing chmod 755 * in the root I did chmod ...
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360 views

Server error 500 due to file permission

I just installed apache/php5 on ubuntu.When trying to access folders in localhost (via the browser) i got a permission denied page.I tryed to chmod for the files to 755 -R and now i got a 500 ...
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79 views

How to do an ls as if you were in the group 'other'?

In a linux system, I've done a chmod o+r -R mydir/ and I want to check that users in the 'o' group are able to read the contents of mydir. How can I do an 'ls mydir' as if I were a user in the other ...
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446 views

a graphic utility in windows to change folder/file permissions like chmod in linux

i want to make a folder available for upload to users. i have to make this folder as 777 file permissions Is there any graphic based software to accomplish this task ?
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25 views

Homedir inside homedir restricted access

On my VPS i've installed debian, apache+php. I have 2 users: foo and bar. Apache is configured to execute php files from /home/foo/htdocs. I created dir: /home/foo/htdocs/bar/ and made it home ...
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2k views

Can't change owner/group to root:wheel on certain stubborn files

SOLVED: Turns out at one point while trying to copy files over to the thumb drive it must not have been mounted by OS X, and since I was root, it made the same mount point directory and copied into ...
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3k views

Samba shared folder and permissions (CentOS 5.5)

I have set up a samba shared folder /shared I have created 2 users Jack and Jill, and they are part of the Developers group. Developers have read write and execute permissions on the /shared ...
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Mounted Share from TerraStation file server - can't change file or directory permissions

I am trying to delete files from the TerraStation share in a subdirectory. These are marked by TS as having permissions issues. Through a terminal window (Mac, OS 10.10, CentOS) I su then cd to ...
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37 views

change permissions for only one user in Apache-managed directory

Ok, this may look like it might be an Apache or an Owncloud question, but I think the way I want to try and solve the problem is a more generic one: On a Mythbuntu 14.04 server box, I have Apache ...
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294 views

Cannot change directory into home directory, although permissions are set correct

I guess I need some help from an advanced Unix user... On a Ubuntu System I did something stupid. I typed sudo chmod 774 .* or the like, in a subfolder of my home folder and then I suddenly could not ...
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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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73 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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81 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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143 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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1answer
146 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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14 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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372 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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707 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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97 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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69 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 ...
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304 views

Clone permissions for all files in a folder [duplicate]

I have a question. So I have 2 folders, both of which have the same files in them, but some with different content, but the same names. What I want to do is clone all of the file permissions from one ...