Security :: Debian Shows File Permissions Change When Copied To A Windows Partition?
Dec 10, 2010
Some time back using this computer a SucKit rootkit was found. Having dd urandomed the drive, flattened CMOS battery, flashed BIOS, run Knoppix live CD 6.1,using no flat pack battery (laptop), and memtested the RAM, I am still having problems with what I suspect is a javascript file that tries to reload the rootkit from? firmware. I suspect the firmware as everything else should have eradicated it??
Also it or a hacker via a backdoor then corrupts the drivers so devices malfunction. Windows security programs and rootkit detectors don't seem to pick it up. Fresh install of Windows or linux after the above still show this problem, though internet not used. The person who admitted rootkitting this machine is capable of writing java programs or using javascripts to do all this.
When viewed using Ubuntu 8.4 files and dates on a Windows partition appear normal both in file manager and terminal. However booting using Knoppix CD these files are all green, and I cannot change their permissions, even as root. ie: everything is green including text files etc. If I copy them to a linux partition, I can change their permissions and make them nonexecutable and nonwritable. Also on the Windows FAT32 partition the . directory has the date 1 Jan 1970.
If I disable any green files, I can shutdown and reboot cleanly. If I don't I start having problems shutting down [/usr/sbin/init ?] And always these follow a pattern:
Can't remember details as I have now corralled the beast but error messages relating to:
nfs-server
inet.d/statd
are the start of these.
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Mar 2, 2011
Here is my fstab's content:
/dev/sda7/media/entfsdefaults00
/dev/sda8/media/fntfs-3g silent,umask=00000
[root@localhost code]# ll 2
-rwxrwxrwx. 1 root root 0 Mar 2 20:19 2
[code]....
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Mar 24, 2010
I'm sure that the issue I'm having is easily solvable once I gain some understanding about copying files - and file permissions in Ubuntu. Here's my situation:
I have an external HDD where I like to back up some files (I mess around with distros on my main machine and feel less stressed knowing the important stuff is backed up). I have an ext4 partition on the external drive where I have copied files, both through the terminal (cp 'filename' /dev/sdc3) and by drag and drop (gnome-terminal).
The problem is, once the files are copied, most are inaccessible. I can view them, but some directories and individual files say I do not have permission to open them. Others are accessible. This is from the same user profile that copied them.
How do I see what's going on? More importantly, how do I make files on external drives available to any user or OS (that can handle ext4)? I want to make sure that if my whole system gets effed that I could still do a reinstall of my OS and then access those backup files.
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Nov 2, 2010
I have a remote directory shared over NFS called tech with perms set as 0750 and owner set to root:tech. I have 2 groups: tech, and techAdmin. tech can read and execute within tech/. techAdmin can read, write, execute. I have 4 users: user1, user2, user3, user4. user1 and user2 is a member of techAdmin, user3 and user4 are members of tech. simple so far...but wait here's the problem. If user1 creates a file inside tech, user2 cant read or modify it because user1 owns it. Here's a few sites that reference this problem:
[code]....
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May 12, 2009
have a script that will report whenever a file is copied? Some useful information would be the time/date, user, and destination whenever a file is copied. I've looked into the stat command, but it does not distinguish between copy and access.
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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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Nov 21, 2010
I'm currently working on fixing another problem url
I have a 60 g internal laptop hard drive, 30g is Windows 7 and 30g is Ubuntu.
When in Ubunutu I can access the window's driver and mount it, however, when I am in windows 7 it only shows the Window's partition.
Is there a simple way I can get the ubunutu partition to show up>
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May 18, 2010
we have two work computers, one with windows and one with Ubuntu. We are going to change the windows computer to Ubuntu, and put them on a network. So we copied all of the documents on the windows computer to the Ubuntu computer as a first step. The problem is, with the documents and folders that we copied, if they have spanish accents we can't open them.I tried looking on the forum but I didn't find anything about exactly that problem. One post suggested that the "locale" might be the problem, but our locale seems to be the correct one for our country and language.
The accents show up as white question marks inside a black diamond. If I open a file inside a folder with an accent, or a file with an accent, it tells me that the file doesn't exist.But when I change the name of the containing folder or the file, and replace the question marks with accents, I can open the folders and files.But we have lots and lots of documents, and it would take a really long time to change the name of all of the folders and files. How can I fix all of them at the same time?
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Jul 2, 2010
I'm running a dual boot system with winXP and Debian Lenny. Here's my hard drive set up
hda1 - windows ntfs (just for use with windows)
hda2 - / ext3
hda3 - swap
hda4 - /home ext3
hda5 - /windows fat32 (shared partition between linux and windows)
Now, I have access to /windows but it's owned by root so I can't create/modify anything and I can't unmount it to use chown.
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Jun 22, 2009
i try to copy file music .oog .wav from Music folder to /usr/share/sounds/freedesktop/stereo but i can't and in folder /stereo i can't manage rename ,cut ,move to trash for all file .ogg when i right click at file to look Properties > at permissions i saw owner : root can not change these permissions
that 's i not understand about owner . and how i can change these permissions ?
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Mar 11, 2011
my HD is partitioned in 3 volumes. The one witch is Ubuntu installed, I can change the permissions normally. The other ones I try to change the permissions on the properties and on terminal using chmod, but none of those work. They work only in the Ubuntu partition.
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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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Apr 4, 2011
I've been using Ubuntu for a few years and I am having issues trying to load .jar files and .exe files in Wine. I keep getting an error message that says my computer doesn't have permission to load these files. I've done some research and found people saying to enable the file as executable in the files properties, to enable executable in the permissions folder, and to allow source code on the Ubuntu Software screen, but whenever I try to check these boxes, they immediately revert to having a line through them instead. I remember when I was running Ubuntu a few years ago I was able to completely disable this restriction in terminal, but I can't remember what I did.
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Jan 24, 2011
I have an NTFS partition that I use to swap file back and forth between Vista and F13. I store school files in there, like documents and text files. When I use Nautilus to access the partition, I am always asked for my root password. This is a little annoying. Is there anyway I can keep this from happening?
I have my Windows partition set up to auto mount with fstab. I can access it fine in the command line and launchers that I created with out the root password. I suppose I could do the same for this partition, but I would like to access it directly with Nautilus if it is possible.
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Feb 22, 2011
Recently I've tried installing Calibre from the Software Centre, but it seemed to be glitching as when I press Update Source, the 'In Progress' icon shows up, but when it finishes nothing changes - the Update Source button is still Should I report this?Anyways, I've installed Calibre from their website to .calibre in Home Folder. However, the folder is 'locked' as it requires root priveleges and I can't drop files there without being the admin. I'd like to reduce 'open as root' files to minimum, so I was wondering if there is a way to change the permissions of all the content in one operation, preferably using GUI, and not the terminal?
In addition I've noticed that other folders in my Home Folder like Pictures/Wallpapers require root privileges. This is really annoying as when I 'experiment' with Ubuntu I use Live CD to make sure I don't screw up the main system. When I do I can't open some files from hard disk because of those root inconsistencies
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Jan 25, 2011
How to set the default file permissions on ALL newly created files in linux - but differs in important ways:
I want all files created in (or copied to or moved to) a certain directory to inherit a set of default permissions that is different from the system default.
Rationale: The directory in question is the "intake hopper" for an application. Users in a group place files in the directory, and the app (running under another user id in the same group) takes them and processes them. The problem is that the owner of each file placed in the directory is the user that placed it there, and the permissions are defaulting to "rw-r--r--"; I want to change that to "rw-rw----". The app doing the intake can't do that explicitly, because the user id the app is running under doesn't own the file in question, and the default permissions don't allow the app to chmod on the file! Obviously, the user could do a chmod after putting the file there - but I want to keep the "drop" by the user as simple as possible. (These folks are not linux-literate, they just drag and drop the files from their windows desktop to a (Samba) network share - i.e. they don't even know they are interacting with a linux system.)
umask seems too powerful: I don't want to set default permissions for every file created anywhere by these users - just those created in (or placed in) this directory.
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Jan 23, 2010
I have a setup samba and want to get the correct security permissions when my wife creates / copies files from her camera onto the shared/mapped drive on her new laptop (windows 7) I want the permissions set to 770 or maybe 760. See my config below.
Now I can get it to create 760 but even if I change the mask it still generates the same permissions. After every change I restart the samba service. the umask is still 0022, do not know if that makes a difference? The directory permission's are correct with this mask. Do I need to look at groups?
[Code]...
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Jun 14, 2011
I'm trying to copy kubuntu from a old disk to a partition on a new hard disk. I used the command:
cp -apx /mnt/source /mnt/dest
I also edited fstab and changed the uuid to the correct partition, rebuild grub, and rebooted. When booting the kubuntu in the new partition, the sysytem still refers to the old partition (which is much smaller). ie: df displays the old partition. Is there another config file that has to be edited?
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Apr 6, 2010
I have an ntfs partition that I wish to access as a normal user(non-root). For this I did the following. As root I created a folder /windows and did a chmod 777 -R on /windows. Then I added the following line to /etc/fstab
Code:
/dev/sda3 /windows ntfs-3g defaults,nosuid,nodev,umask=000 1 0
Now, the partition is mounted alright but the problem is that when any other user (non-root) creates a files in /windows (say by executing touch newfile) the newly created file has the owner and group set as root. The non-root user can create the file and he can also delete the file, however, he cannot change the permissions of the file and also the owner:group is always set as root:root. How do I get across this problem, i.e. how do I mount a partition, so that a non-root user can also change the permissions and ownerships of the files he creates.
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May 19, 2010
I see these activities logged on a fairly regular basis in /var/log/auth.log and was wondering if this is normal activity?
firefox: gethostby*.getanswer: asked for "ftp.cs.rose-hulman.edu IN A", got type "DNAME"
The format is always the same, though sometimes the address is a regular Internet site.
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Jul 7, 2009
i am trying to set the file permissions for the log files "/var/log/Xorg.0.log" and "/var/log/gdm/:0.log". These files seem to be created when a user logs into a whokstation (my guess so far). I am trying to comply with a security mandate that all log files in the directory /var/log are set to 0640. The two mentioned files always seem to have the permissions 0644, does anyone know where and when these filea are created and how I might set the permissions when the files are created
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Jun 20, 2011
I am using Ubuntu after a BSOD error. Ubuntu is awesome, I can access all my windows files, however, I need to access my programs on windows. Here's what happened - I accidentally changed permissions after getting a virus. I then tried to do a system restore and during that process the computer crashed. When I try to boot to windows in every possible mode, I am always left with the dreaded blue screen of death.
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May 4, 2010
I recently upgraded to 10.04. The grub menu shows my windows partition but does not load it when I select that OS.
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Sep 12, 2009
Is there a way to specify append only permissions for a file?
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Mar 19, 2010
I've got a samba share on a linux server, connecting to it with a windows 2k3 server via tools > map network drive. The goal is to be able to use windows to change the security of the samba share. The good news is it works! The bad news is it's not QUITE perfect:
The share is called /company. I started with the following to give everyone access to everything, set the owner of the share to administrator (my domain admin on the Windows domain), and set the group owner to domain users (group that everyone on the domain is part of):
Code:
chmod -R 777 /company
chown -R administrator /company
chgrp -R domain users /company
I then mapped the drive as a regular user, and of course, can access/modify/delete/rename/create anything I want. Then I picked a folder to lock down. Let's call it /company/myFolder. I did this on the Windows server by mapping the drive as administrator (the owner), right click > properties > security tab > advanced > highlight "domain users" and "everyone" and click edit > clear all (i.e. remove all access). Go back to Linux and
[Code]..
The only issue that remains is that I am able to rename/delete "myFolder" as a regular user. I thought this was coming from the "acl map full control = true" parameter in smb.conf, but I changed it to false and verified the change and it still happens. If I remove group and world write access to /company, I am no longer allowed to rename/delete myFolder, but then I can't create a new folder. If I add group write access back in I can create files but can also rename/delete folders within /company that have --- specified for group access. Any ideas what I need to tweak to make this right?
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Jan 31, 2011
I'm in an organization where each user has a Windows network username, and a central windows server with a folder for each user. I can access the folder using SAMBA and my (windows) network user name. I want to change the permissions (sharing settings) for my folder on this windows server - using only Ubuntu.
Had i been using windows I would simply right-click on the folder, go to permissions settings and add/modify users in the list.First of all, is it even possible to do this using Ubuntu?
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Mar 3, 2010
I am setting up a new ubuntu server, and I am quite new to linux. This server will be used as code repository for a project I am going to be working on. I plan to setup 3 groups for users: dev, test, doc
- for various developers, testers and documentation users.
I would like to setup the following permissions on the main code repository directory:
dev - write permission
test - execute permission
doc - read permission
public (anyone outside these groups) - deny all access
I am unsure what chmod setting to use, or if this is even possible in ubuntu.
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Mar 24, 2011
How is possible, that vim can write to file and changes his ownerchip ?
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Jul 6, 2011
I know how to assign file permissions and other tasks like user to group, but I'm stuck with a situation in how I should set up my system.So I have a LAMP server set up. I'm not the only developer so I created a group called "developers" for my other users "Mike," "Alex," and "Cindy," which are developers (I'm Mike by the way). I know that "www-data" is the user and group Apache uses.This is good because only I have permission to update the production site, but for the dev site, it's a different story.
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Jul 16, 2011
I have a NTFS drive mounted at /media/bigbrother as my user. I have no trouble reading or writing to files here. I just created a link to /var/www using: ln -s /var/www /media/bigbrother/
The link is there however, I can't even open the folder. How should I go about getting access. So that I'm able to copy files from other systems on the network.
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