Fedora Security :: How To Prevent The Appearance Changing Window Running
May 21, 2009
I want to prevent users changing the wallpaper, as i couldn't found any direct method I thought of preventing the /usr/bin/gnome-appearance-properties being running,
I know that the user also can set the wallpaper without running that . But didn't found any other way .
I tried to use SELinux to it and I'm stuck at writing a own policy.
According to SELinux, it prevents everything ., but as i have mapped the user to a SElinux user ,even though he can use administrative tasks , he can run the appearance window. that means he has got the permission from a different policy , Currently I'm stuck at this place.
Suitable way to prevent the wallpaper being changed by the normal users.
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Jul 18, 2011
When I start Ubuntu, file explorer windows look like they should.
Then, after about 15 seconds, the windows manager automatically switches to a greyer, bulkier design
How can I stop this behaviour?
I am using Ubuntu 11.04 as a guest OS in Virtual Box 4.0.12
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Jul 17, 2010
I use the following method for preventing the users from changing their passwords , is there any other method other than this ?ls -l /usr/bin/passwd-rwsr-xr-x 1 root root 37140 2010-01-26 12:09 /usr/bin/passwdso we need to remove the suid for that command as follows :- chmod u-s /usr/bin/passwdnow normal users won't be able to change their own passwords - and only the root user will be able to do it for them.
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Jun 15, 2011
I am administrating a system with about 40 or 50 users, and we recently jumped ship from windows to ubuntu. Most of my users are getting along fine, but it seems every few days, i have to help someone who accidentally changed something, and now their account (or more rarely, the machine) is unusable, and has to be reset.
I know configuring /etc/sudoers is a huge step toward fixing my problem, but that still will not completely solve it. What I would like to do is prevent users from making ANY changes to the system (aside from their work files and the like), including themes, icons, desktop, background, etc.
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Sep 30, 2010
'readonly HISTFILE'
but the user could tamper with the histfile itself. Like:
rm -f $HISTFILE;
rm -f $HISTFILE; mkdir $HISTFILE;
rm -f $HISTFILE; ln -s /dev/null $HISTFILE;
I'm experimenting with PROMPT_COMMAND to execute a command each time the user executes a command and so log it somewhere else.This post was pruned from the 2009 Is there a way to prevent users from changing or unset their HISTFILE variable? thread. Please do not resurrect old threads but instead create your own (and maybe provide a link to the old one).
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Dec 30, 2010
I've a Linux box with few users (with shell). I would like to prevent normal users see all the processes running on the box. How can I implement this?
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Jul 14, 2009
I am facing a really weird kind of issues where my boss has asked me block everybody from changing their wallpapers and put a default one there.
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Jan 10, 2011
Is there a way to avoid changing the wallpaper/Desktop background other the onces which come as default on fedora?
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Jul 12, 2009
I am running a program in gnome-terminal window (using metacity window manager) which will take many hrs to complete.
I was wondering if there is some way to "lock" that window, so that accidental closing of that window is prevented.
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Dec 25, 2010
Just upgraded to 10.10. My appearance preferences are set to the "ambient" theme, but when I reboot, the system changes the toolbar/icons etc to the hideous "no-theme" (windows-looking grey with big icons) appearance. When I click on System->Preferences->Appearance it immediately loads up Ambience without me having to select it (like it knows that it's been naughty!) I'm on a tiny-screen netbook. I suspect that 10.10 is not saving the appearance settings properly.
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Mar 25, 2010
recently I have been trying to create the perfect custom ubuntu .iso to write to a usb drive so i could carry around a live cd version of my current desktop operating system. I have 2 problems...
1: using various tools like Remastersys, Ubuntu Customization Kit, and Ubuntu's own LiveCDCustomization tutorial I have managed to install most of the packages that I want.... Truecrypt is not in the repos and i would very much like it on my custom live cd. while in chroot i tried using wget to download it then extract and install it, but i got a 404 error so it did not seem to be connecting to the place to download it. is there a workaround to getting truecrypt to install into my extracted squashfs? would it be possible to download the packages to my desktop then copy them over to my chroot squashfs to be installed?
2: I have not been able to customize the default appearance of the desktop environment like the background, icons,colors, window border, panels, applets, and so on.... Ubuntu's tutorial states that I need to edit .xmls in /etc/gconf but i do not understand how to edit those to get what I want. LiveCD creates a new user with default settings everytime it is started so its a matter of editing the files that control the settings of a new user.
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Aug 5, 2010
On my Kubuntu 10.04 machine changing the icons is done in the appearance section in menu-system settings-appearance then selecting icons. Can this be done in Ubuntu 10.04 and if so how?
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Jun 23, 2010
My window content is really grey and boxy. But the title bars and what not are fine. When I change my theme it doesn't fix it.
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May 11, 2009
I am new to Fedora 10, and to SELinux too.
I would like to know how can I prevent from users with role user_r to connect to Internet with firefox.
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Nov 3, 2010
every time i start up my laptop, "appearance preferances" window pops up with no reason whatsoever..
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Aug 13, 2009
I am using fc.11 and loving it. i want to change login window but like fc.10, it is also without a separate tool to do this. i searched and found something very similar here:[url]i.e. appearance>background>select image>make default>root password but it changes my background only, login window is that old one.
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Mar 19, 2009
I'm doing a research to protect my pc from physical access. What I'm facing here is that my company created a program for fedora 8 and plans to sell the unit away. We created a function where you can configure the program using any web browser from a network so we do not want anybody to have access to the fedora except for out personnel.
Based on my research, I've found [URL] this guide to protect people from accessing grub and single user. I am currently researching on preventing others to clone the harddisk. I would like to know if there are any other methods to prevent people from unauthorized access to fedora.
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Oct 17, 2010
I got a new computer recently, and just now installed 10.10. Everything was going great.... until when I enabled the Nvidia drivers and set my dual monitors. While things still work fine, it appears I have no theme set (Aside from the Window Border).
When I check in System->Preferences->Appearance it always shows the theme properly for this one window, while all other windows, and gnome panels etc appear to have no theme set (just use simple flat colours, low graphic mode etc).
Changing the theme (via the Appearance window) does not work, nor does a simple reboot.
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Aug 11, 2009
After install glibc-2.10.1-4 (x86_64) package, i couldn't run the qemu-kvm anymore.
SELinux is preventing qemu-kvm (svirt_t) "setrlimit" svirt_t.
SELinux prevented pt_chown from using the terminal 0.
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Mar 29, 2011
On my crontab there is an entry to run a script I wrote that backs up my local files to my remote server. It was working great, running once a day. However, I now want to make the script run every hour.The problem is that if there are too manyfiles to transfer (Example:I ripped a DVD in the last hour) the actual backup may take longer than 60 minutes.So I want to modify the script to check if my backup script, based on rsync, is running. If rsync is still running then do nothing and exit the script. If it is not running, execute the script as normal.
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Jul 17, 2010
I use the following method for preventing the users from changing their passwords , is there any other method other than this ?
ls -l /usr/bin/passwd
-rwsr-xr-x 1 root root 37140 2010-01-26 12:09 /usr/bin/passwd
so we need to remove the suid for that command as follows :- chmod u-s /usr/bin/passwd now normal users won't be able to change their own passwords - and only the root user will be able to do it for them.
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Feb 4, 2010
How can I prevent users from changing their own password? I was surprisingly unsuccessfull in finding a solution for this on google. Lots of stuff about hardening ssh access or dealing with password aging using "chage" but nowhere could I find an answer for my question.
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Jul 7, 2010
Sometimes when starting applications, especially with Wine, the screen resizes to a much lower resolution. Sometimes when I close the application & usually when it crashes/I have to kill it, the screen stays at that much lower resolution. To get my normal 1900*1200 resolution back I have to delete all the applets I've put in the top menu bar to for there to be enough space for the menu to appear for me to select System>Prefs>Monitors.How can I prevent an application from altering my resolution & just force it to run windowed, or at a higher resolution?
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Aug 31, 2010
Running Centos 5.5 64bit. Sometimes I boot this instalation in real machine, sometimas using vmware workstation. The problem is that these environments have different network interface cards - as soon as kudzu detects that network device changed it renames ifcfg-eth0 to ifcfg-eth0.bak and places new default ifcfg-eth0.
Is it possible to command kudzu to leave ifcfg-eth0 as it is ?
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Aug 10, 2010
I'm not sure this is the correct place for this post, but since it involves a keyring, I'm making my best guess. Feel free to move it if I am in error. I have had a "tmp" directory appear under Places in the first grouping which contains "Home", "Deaktop", "Documents", etc. When I open this folder I find the attached png file.
When I look for this folder I find it is owned by root, but it appears in what should be my home directories. The only guess I have as to it's origin is that I recently formatted a USB stick as an encrypted device. I don't know if that is when it appeared or not.
Can anyone shed any light on what this folder is, and why it appears where it does? Somehow it just doesn't seem a correct placement.
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Oct 19, 2009
When I installed Fedora selected the option to encrypt the hard drive. I want to change the passphrase, is there a way to change the passphrase, or do I have to re-install Fedora?
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Jul 24, 2011
I need to change SELinux policy to permissive and then back to enforced for an installation. I understand that I should be able to do that through the SELinux Administration window accessed through System -> Administration ->SELinux Management. But I do not have any real sysadmin tools available in my Fedora 15 Gnome Gui interface. Am I missing something, or should I use some sort of similar command line tool to do this?
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Sep 28, 2010
I was using ubuntu 10.04 till yesterday.. and due to hdd crash i have changed my hdd.
while looking for my installation disc, my wall-mate gives me this Ubuntu Studio dvd and instead of downloading a new one, i have installed the studio. at the first sight ... i am being a fond of studio version .. its really cool.
now, i am quite habituated with default appearance of ubuntu, i found studio appearance is quite unusual (for me, menu layouts, panel everything).
I would like to know how do i change this default appearance like ubuntu default 10.04 appearance. I am attaching a screen-shoot of my friends desktop, he upgraded his ubuntu thru apptitude update.
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Sep 7, 2010
I would like to know how to prevent the xfce4 from starting as well as the login window. I just want my tty7 just like my tty6. However I do want to be able to start xfce4.
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Jun 29, 2010
In Gnome, I don't like how Deb default GUI navigator opens a new window every time you navigate to a lower level. Results in loads of windows open. How to change this behaviour?
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