Ubuntu :: Change Permissions On Read-only Filesystems
Jun 22, 2010
Generally, I LOVE Ubuntu 10.04...best Ubuntu yet, IMO. But there's this one thing about it that really bugs me, and that is that all executable files on CD/DVD are set with very restricted permissions, including the 'Allow executing file as program' checkbox being left blank. Since CD/DVD's are read-only, I can't change these permissions the normal way or even just execute the files as root!
So far I've been able to get by with just copying the disk's contents to the hard drive and then running the program with altered permissions from there, but right now I want to install Unreal Tournament 2004 (the DVD version, if that makes any difference) and its Linux installer will not function properly from a local directory, so I'm stuck on this one.
Surely there's some way to alter the permissions for a read-only filesystem! Can't I just set system-wide permissions that would even apply to CD's and DVD's?
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Mar 4, 2010
I've already formatted it 3 times, it works for 1 try then it turns read Only again. I'm looking for a fix that doesn't make me delete everything before I want to use it, because this is getting ridiculous.
Going into further detail:
Randomly when sticking the USB into the PSP the console/computer chooses that it's READ ONLY and you can't change anything in permissions.
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Aug 23, 2010
I am trying to get my Multimedia player to work with Ubuntu I can't have access to it because it said that it is read only. I have got to gksudo and tried to change the permission on it but can't. The player works fine on a windows computer. All my other usb devices work fine I was able to change permission in the folders but not the drive.
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Feb 2, 2010
Something has changed all my file permissions to read only and when I try and change them back it wont let me. Is there something I can do i Nautilus to correct it?
It even effects the waste basket-all the stuff in there is now read only and when I delete items I get a file operations window, which comes and then goes like its deleted them, but they re still in the waste basket, doesnt show an error message like it does if I try and move any other file.
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Mar 15, 2010
I have a problem with my external hdd, I mounted it manually and in the mount table it says ive got rw permissions. But when i try to change permissions it says:
chmod: changing permissions of `whatever': read-only filesystem.
This is my mount table:
[root@localhost ExtHDD]# mount
/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
[code]....
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Feb 8, 2011
I have 3 partitions, all NTFS filesystems, I want to keep them, but change the filesystems on all 3 of them to Ext4. So if i choose "Erase and use all" will I be able to partition later? I'm thinking more about doing like this, but I'm not sure : First partition as my main, system partition, is this correct?
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Oct 16, 2010
Finally I managed to install my printer/scanner drivers.The last thing I need to do is to add the following two lines to 40-libsane.rules (which is a read only file):# Brother scanners ATTRS{idVendor}=="04f9", ENV{libsane_matched}="yes".How can I change permissions for this file or add these lines without changing permissions?
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Feb 21, 2010
I'm new to Ubuntu Linux but have many years on windows platform. Please can someone help me with how to change the following items.
No.1 I would like to change the HORRIBLE!! YAK!! brown background color behind the word Ubuntu in the start up screen when the machine loads up (before the login). I have located the image file for this which I have found to be: /usr/share/images/xsplash/bg_2560x1600. jpg but the OS says that root is the owner and that I don't have permission to change this. So how can I change this for a color I do like.
No.2 I would also like to change the login dialogue screen style. I know this is possible but again I'm fumbling to see how I can do this. I have tried with the start up manager but every attempt fails, the settings don't take. Once again I suspect permissions are at the bottom of the problem?
No.3 Would like to have a colorful splash screen image on boot up, I've managed to remove the old one (small white 3 ring ubuntu logo on black background) but havent been able to install or replace with a new one. Its been incredibly frustrating, I'm feel sure I'm missing something simple here. Wondering if its permissions yet again?
Anyone who can offer help on any of the above, guidance or advise me would be much appreciated. Please bear in mind that I'm still very much feeling my way with Linux so keep it simple.
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Sep 1, 2011
If this information excists here so sorry I was not able to find it. How to change permissions in Unbuntu for those people who are trying to change persmissions in a subdirectory.
Open the terminal and then type: Quote: sudo chmod yourpermission number /thenameofyourdirectory
Example:
Quote: sudo chmod 755 /directory
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Jul 13, 2010
Can only read files on USB stick, and USB Drive. Can't copy, move or delete them due to restrictions/file permissions...."You are not the Owner...." etc. Can I remove all such permissions. I am the only user of this machine?
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Mar 19, 2010
I am running Karmic x64 on a HP laptop that has a cd/dvd burner. I have a r/w cd with files on it and I wish to add/remove files to it. After it mounts automatically on insertion, I unmount it and remount with:
sudo mount /dev/sr0 -t iso9660 -w /media/cdrom
(I tried assorted other hare-brained things also) but it always says that the filesystem is read only. Do I need to use a different device than sr0? Is it even possible under Ubuntu?
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Nov 9, 2010
I'd like to add essentially an anonymous user, which does not require a password. Second I think it's probably a good idea to only give this user very limited permissions, is there a way I can restrict the commands that they can run to a list (i.e. they should be able to run scp, ls, cd, maybe a few more, but not much)?
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Oct 5, 2010
I have a very large and deep directory. I would like to make all of it read only. The problem is I guess I have to distinguish between files (which will get a=r) and directories (which will get a=rx).How can I do that?
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Apr 6, 2011
Yesterday, I bought a 1TB WD Passport, for backup and storage. It uses NTFS, and I've had no problems manually mounting and moving files to and from it from root. However, I don't like having to be root to in any way modify the data on the drive. In order to avoid this I decided to create a line in fstab that would allow permissions to the user, so I added this to my fstab:
Code:
/dev/sdb1/mnt/external ntfs defaults,
noauto, noexec, user, uid=1000, gid=users, umask=0022, nls=utf8 0 0
This allows me to mount, unmount, and peruse the external HDD - however, if this is active, neither the user NOR root have permission to make any changes. The HDD acts as read only, even though there is no "ro" option on my fstab.
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Aug 11, 2010
How do I change folder permissions without changing the permissions of the files within the folder?
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Mar 23, 2010
i have setup a samba server and created samba shares on it, i have configured the samba server to authenticates users from a windows server 2003 DC,
i have 2 shares call IT and MYSHARE, I want to give read and write permissions to sevaral users to those two shares and read only permisson to all the other users.
i tried editing the smb.conf file with the following settings , but no one can write or modify the files in the shares including the users specified in the
write list = cweerasinghe,njayarathna.
[IT]
writeable = Yes
browseable = yes
public = no
comment = IT share
[Code]....
how can i give access to the write list = cweerasinghe,njayarathna users to
read, write and modify the files in the shares ??
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May 6, 2010
I have apache2 running on my computer. I want to change the permissions for /var/www/ so that I can edit the files without a problem. Right now I can use the gksudo command, but I'd like to be able to have all the files available when using an IDE like eclipse.
I've read in several places that
Code:
chmod 755 /var/www
will do, but if I'm not mistaken that would give read/write access to anyone. I'm not in a production environment, so I'm not too worried about security, but I'd like to give anyone else as less permissions as possible. Would this be possible?
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Aug 6, 2010
Just finished downloading a game in .run format, i downloaded it to my Home>Downloads folder and ran these commands in terminal: (game is tremulous if it matters)
chmod +x tremulous.run
./tremulous.run
It started it up in the terminal and i began working my way through the installation process, and i tried to install it into my Home>Games folder. (Is it supposed to be home>games or your username>games?)
and it said PERMISSION DENIED. No write permission to Home/Games/
How do i give myself read and write permissions to my game folder?
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Jan 28, 2011
I have a file server running 10.04. I have a user that belongs to 2 groups (users is the primary and IT is the secondary). I have permissions set up so that this user and other users that belong to the IT groups can read/write files and others have no permissions whatsoever. I have also set the umask to 0007 so that any files created have the effective permissions. My concern is this: since my primary group is users, is it possible for me to create files with the owner group IT for only this specific folder?
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Nov 25, 2010
Is there also an chmod GUI for read and write permissions?
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Mar 19, 2010
Recently updated the kernel in Ubuntu 9.10 and for some reason now, a folder which was not read-only now is. I can't delete anything from it. Have tried using the GUI for changing permissions, however, it has a mind of it's own and won't unlock the folder.
Anyone had this happen where a folder locked when you didn't want it to be?
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Jan 10, 2011
I have a question regarding Samba Permissions. As the subject described, is it possible to let users read the file but can not copy the file physically? It's fine if they open and copy paste the contents but no physical copy paste and also I need to log the activity of the users. If samba will not be able to comply my needs, could you suggest some programs to meet my requirements?
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Jan 20, 2009
I have a CMS that has a brilliant backup option with one flaw, it can only create a full backup in a directory inside the web root. In this case /var/www/site/backups. This is not practical for security as the resulting tar.gz file contains a full mysql backup as well as other items that the general public shouldn't be downloading.What permissions do I need to set so that the directory /var/www/site/backups cannot be browsed to in a browser but can be read / written by the CMS when a PHP script calls it?
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Mar 31, 2010
I have created directories in root. I am looking for the chmod command to allow all users read and write permissions to a specific directory. I have done chmod 775 for a file but I need this for a directory. This includes permissions on all files and sub directories.
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Jun 14, 2011
What I want to be able to do, is have create a group, for example called "group1" and set its default permissions to read & write, instead of the usual just read.
So when I add a user into "group1" they automatically have read & write access to all files & directories which is in "group1".
Oh & I use crunchbang 10 (statler) for my desktops & Ubuntu 11.04 for my NFS/print/SSH/etc/etc server
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Dec 17, 2010
Is there a Linux command, or a series of commands, which will allow me to get the permissions of a file in "0644" format?
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Jul 4, 2011
I'm pretty new to Linux. Though I've used it for a little bit, I barely know any shell commands. I recently migrated from Mint to Fedora. Installation went fine and I thought I was doing great until I tried to copy something onto one of my ntfs partitions (I got them automounted through changing fstab). Now I can't change the permissions with sudo chmod... it says I can, but nothing changes. And, while the folders are listed as allowing rw for the user group I set up, I can't actually change anything. I'm guessing I've done something wrong with my fstab file.
My fstab file is:
Code:
I should probably note that I'm using NVIDIA fake RAID 0, which is why my device locations are all /dev/mapper/nvidia_fcficeibp#
The command I have tried to change permissions is:
Code:
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Mar 2, 2010
Binary files need only execute permission to execute. No read permission is required. But all executable files must be read by the kernel into main memory before executing. Also script files need both read and execute permissions for executing the file.
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Jul 8, 2010
I own a particular file on a Linux system. I would like to give 2 groups (accounting, shipping) read access and only read access, and 3 users(Mike, Raj and Wally) write access and only write access. How can I accomplish this?
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Mar 24, 2009
I have 4 machines; all multiboot. I want each machine to have full rw access to file shares on each other machine, AND, full rw access to the other partitions on the same machine home folder for UNbooted OS's. I imagine Samba will NOT handle all these configurations? What else do I have to do, so that, for example, if I have 2 machines on, and I boot up a third machine in another room, it will auto mount the other 2 machines' shares, and it export it's own shares to the other 2 machines? I want also each machine to have full rw access to shares on the UNbooted partitions of each machine.
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