Ubuntu :: Flaw In GDM And Custom Xsessions.
May 9, 2010
For a long time I've used a custom xsession that loads Mythtv without any sort of desktop environment. Every time I upgrade I've just backed up and restored my xsessions entry. I did the same when switching to 10.4 only to find that the custom xsession entry causes gdm to login WITHOUT a password.When I select the custom xsession in GDM I get logged in immediately without a password or confirmation. The expected behavior is that I'd select the xsession and not get logged in until after entering my password. I've done some trial and error with this issue and it seems that it boils down to a single line in the custom xsession file.
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Feb 18, 2011
I've evaluated about 15 offline storage systems this week, and one of the best was spideroak, but there's a huge issue in their shared folder structure and procedure.When you make part of your data shareable you MUST share a folder from your original disk. This is a real pain. You cannot share specific files like you can on many others.To initiate sharing your establish your unique username for sharing (different preferably than your spideroak username) the share name, and the room key (password).While you might expect the share name to be part of the URL that guides you to the share which then accepts your password for access, thats not how it works. Instead spideroak gives you a URL that contains the PASSWORD and does not even mention the share name!!
Therefore anyone you give the URL to has direct access to the share you create (which is what you are trying to accomplish in general) but any browser THEY USE will remember the URL which contains the password, not the share name.THIS IS A HUGE SECURITY ISSUE since you have no control over how an authorized user is going to access your data and from where and most users are not sophisticated enough to guard against the default intrusion they are going to leave behind.
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Sep 22, 2010
Just installed the latest kernel upgrades, rebooted, fired up KDE and got this message: "KDE detected that one or more internal sound devices were removed. Do you want KDE to permanently forget about these devices? The list of the devices KDE thinks can be removed: Capture: HDA Intel (AD198x Analog) Output: HDA Intel (AD198x Analog) Output: HDA Intel (AD198x Digital)"
It then asked, "yes, cancel, manage devices." When I clicked on "manage" it showed Esound as the only device, but it didn't work. So, was something was left out when the packages were compiled?
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Oct 21, 2010
Quote: The open-source Linux operating system contains a serious security flaw that can be exploited to gain superuser rights on a target system. The vulnerability, in the Linux implementation of the Reliable Datagram Sockets (RDS) protocol, affects unpatched versions of the Linux kernel, starting from 2.6.30, where the RDS protocol was first included.
According to VSR Security, the research outfit that discovered the security hole, Linux installations are only vulnerable if the CONFIG_RDS kernel configuration option is set, and if there are no restrictions on unprivileged users loading packet family modules, as is the case on most stock distributions.
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Jul 18, 2009
I refrained from posting this in the Kernel Vulns thread earlier, due to its zero-day status. But now that the issue has been Slashdotted, there's no use in keeping us from publicly discussing this vulnerability. The link to the article (from which I quote below) is here. Brad Spengler's original announcement on the Dailydave mailing list is here.Quote:A researcher has published exploit code for a new vulnerability he discovered in the Linux kernel. The vulnerability is an especially interesting one in that the researcher who discovered it, Brad Spengler, has demonstrated that he can use the weakness to defeat many of the add-on security protections offered by SELinux and AppArmor.
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Dec 28, 2009
Just spent three whole days barking up the wrong tree, solving Fedora 11 and Fedora 12 boot failures because the correct hypothesis was illogical: installation did not update/modify the initrd.
The first couple of times I installed Fedora 11 on the HighPoint Technologies RocketRaid 2640x4, the installation inserted my "custom" driver module (rr26xx) into the initrd, permanently, so that the system booted off the controller card for which the custom driver was inserted. (I yelled about this success in this thread: [url]
My most recent installs of BOTH F11 and F12 on the RocketRaid failed to properly set up the boot. It turns out that the "rr2640" module I "slipstreamed" into the installation process was *NOT* permanently added to the initrd by anaconda. (F12 gave me "no root device found boot has failed, sleeping forever", on boot; F11 hung also, without such error, I presume, during the init script execution). Because of limited resources and time, I only know for sure the module was missing from the F11 initrd, and am ASSUMING the same was the case with F12.
The only difference between the successful installs and the ones with failed boot is that the successful installs were made on a single-drive (JBOD) mode on the controller; whereas, the failed ones were placed on RAID 5. But, AFAIK, the created logical device for the card is "/dev/sda", in both cases, and the kernel can not distinguish between the two cases (or can it?). Thus, the inconsistency cost me a lot of time, and is still inexplicable to me.
Question: What is the best way to deal with custom drivers, today? There are custom spins, and many tools, like isomaster. Stupid question: Is there a way to modify the initrd inside an installer ISO -- be it for CD/DVD/USBboot drive -- beefing the init RAM disk with whatever modules you'd like, for the boot process (using, say, isomaster)?
And what makes anaconda understand that a module must be added to the initrd ? How can one force anaconda to do so?
How does moving to dracut as the initrd tool affect any/all of the above?
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Jan 28, 2010
I wanted to add some custom emblems so I could label my folders more effectively and after a little bit of work, I figured out how to do it and I thought I should share that info with the group. The first thing to note is that the emblems are stored in the folder /usr/share/icons/gnome/32x32/emblems. The first problem you are going to run into is that you don't have permission to add files to this folder. The way I got around this was by changing the owner of the folder to myself. I am using a computer for recording, so my user name is "band." Change that to your user name.
Code: sudo chown band "/usr/share/icons/gnome/32x32/emblems" After you do that, you can paste your icons (I would use the .png format) into the folder. Next, you have to resize your icons so they are 32x32. You can do this by right clicking on the image then Open With > Gimp Image Editor. When Gimp starts up, go to Image > Scale Image. Change the width to 32. If your image is square, it will automaticly change the hight to 32. If it isn't then you can either force it to be 32 by unchecking the chain icon between the width and height, or you can resize the layer so it fits within 32x32. Then File > Save. If it is not a .png file, I would use Save As and save it as a .png by replacing the current format (.jpg, ect.) to .png. The Gimp will automaticly change the settings so it save it to the right format. I know for some of you these steps were obvious, but I thought I should help people out who aren't too familiar with the terminal or with the Gimp.
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May 21, 2010
I want to create a custom ubuntu ISO (This ISO will contain all the packages with the latest updates released till date).
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Jun 11, 2011
I have several DE, actually 5, and I want everyone to have custom start up. for example -wicd (daemon) and wicd-gtk to start up when I log in to 'awesome' ,'xfce4'and 'ratpoison'and the standart ones for gnome and kde.(btw, it's all happening in Arch linux, but I guess it's not a big deal)
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Feb 9, 2010
I'm purchasing a new laptop and considering the Dell XPS 14, customized.
Specifically, its customized to the sheet I've attached as PDF. The parts I'd assume are most important for Linux hardware compatibility, are:Processor: 2010 Intel CoreTM i5-430M 2.26GHz (2.53GHz Turbo Mode, 3M cache) Video Card: Intel HD Graphics. Wireless NIC: Intel Centrino Advanced-N 6200
Does anyone have any warnings about any of this hardware? I'd like to make sure I'm not going to run into any more issues (as I have personally, in the past) with drivers being crappy because the manufacturer refuses to open up to the Kernel Dev. community.
if you're looking at the PDF, then obviously ignore all the software garbage that Dell throws in (eg. MS Windows 7, Adobe, McAfee).
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Mar 6, 2010
I am in the tasks section of the following tutorial [URL] I did the list package thing to see what packages there are. However now I cannot leave the list in order to run the purge command. How can I get back to the previous section so I can remove packages from the custom live cd. I want to make sure I am editing the live cd and not the current install. I am going to make two images. One cd that will still have a gui but I plan to build as a recovery tool. The other one is a dvd and will be for installing everything I want on any machine. I am doing the tutorial with Karmic. Also I have cursors, themes and icons I installed from gnome look. I then went to customize and created my own personal mix I like. I would like to make this a standalone theme and come as the default theme on the live cd and dvd. I have no clue what I am doing, however wish to learn to build my own custom live cd. Also I would like to know how to ad repositories to the live cd and how to add programs pre installed that are not usually included.
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Mar 12, 2010
What I am going to tell you has worked for the Alternative Ubuntu ISO but I would like to see if I can do this for the Server Ubuntu ISO. I need to pass along some ideas as no one else seems to have tried it this way on this forum (other have been using preseeds but I don't think this way).[URL]Copy files from the mounted ISO to my HDD: cp -rf /mnt/ubuntu/* /opt/ubuntu-server/Once the files were on my HDD, I started to edit files that would help using a special preseed I wanted to configureI changed directories to /opt/ubuntu-server/preseed/ and created a file called test.seedI edited the test.seed file with the example found here:[URL]Saved it and changed directories to /opt/ubuntu-server/isolinux/Started the edit the text.cfg (holds the labels for installing ubuntu)Here is what I appended to the end of the file:
---
label test-install
menu label ^Install Test Ubuntu
[code]....
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Apr 2, 2010
I wasn't using my laptop for at least a few hours, but when I looked at it, it had seemed to crash. I am hoping to figure out what caused this, and to prevent it from happening again. I believe it has something to do with drm or b43 as that is what I could decipher from the screen. I have checked some logs and found nothing irregular. I do not want this to happen again. I am running kernel 2.6.33.1 with no patches and a custom config tailored to my processor. The reason I am running 2.6.33.1 is because of support for my Wifi.
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Jun 11, 2010
Just installed latest ubuntu,
I want the "system monitor" to pop up on ctrl+alt+delete, I'm still damaged from long time on windows ^^
Anyways this is what i have done:
1. system > keyboard shortcuts
2. made another shortcut for "log out" (is ctrl-alt-delete default)
3. then "add" name=Ctrl-Alt-Delete and command=gnome-system-monitor
Now my new custom shortcut is disabled. How can i enable this?
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Jun 11, 2010
I'm sure this is possible to do, but how do I create a Ubuntu install cd that uses my current config. Ideally I would like to be able to install exactly what I have on my system now, without user files. Wine, Ccsm, amarok, audacity, themes the whole nine yards. I tried using a program called Ubuntu Customization Kit, but it wouldnt let me mount the normal ubuntu install .iso file. This would avoid the hour and a half post-install config every time I screw Ubuntu up as well as stripping off many of the programs I don't need...
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Jun 17, 2010
Preload notes the applications I open frequently and preloads them for faster app. startup.
But is there any way in which I can add my own files to preload
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Jun 18, 2010
I recently correctly installed a cursor theme in ubuntu 10.04. When I move the pointer around in a window the theme appears but when I move the pointer around on the desktop i changes to the default theme.
I think it's something with compiz because when I shut it down the theme appears on the desktop...
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Aug 1, 2010
I would like to try and optimize my kernel a bit. Since I am doing this on a fresh install, I don't really care if the os gets bricked in the process, and I am sure I can bring it back if I can boot into a recovery console from the old kernel. So, I followed thispost. I patched it and copied and edited a config file from /boot/, saved it as .config, I tried it several times with both removing and not removing /debian and /debian.master directories from the source, yet I always get the same error when I run "make oldconfig".
Code:
$ make oldconfig
scripts/kconfig/conf -o arch/x86/Kconfig
*** Error during writing of the kernel configuration.
make[1]: *** [oldconfig] Error 1
[Code]...
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Aug 31, 2010
I want to create a custom live cd of off peppermint os one. I want to add specific software, and delete some packages i don't really need. How can I do this Reconstructor is not what i want, because i am forced to use Ubuntu or Debian,
remastersys doesnt work for me since I see no option in using peppermint one as a live cd.
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Sep 10, 2010
I want to create a LiveCD that you can boot and where instead of the normal Ubuntu installer (ubiquity) my own installer is starting.
I tried to do that with FAI, but I have many problems with it. Do you know a good way to do it? Is there an Interface for the Ubuntu installer/Source Code? Any other tools, ideas or thoughts?
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Nov 18, 2010
So, when I play Java games, Sun Java will use default cursor set instead of custom cursor set that i have selected. So, where is the problem? I can see the difference if I start that java game to window, and move my mouse from not-window to window :/
Very annoying, because i would need that custom cursor for that game
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Feb 17, 2011
the archive manager in ubuntu uses default settings for archiving files into .7zip
s. but much more compression can be achieved setting the cmpression level
higher from command line. Is there a way I can set that settings as default in Archive manager?
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Apr 27, 2011
how to make a live cd how can I put it on a usb stick. [URL] Also in the article you install skype etc. but where did they get the path to donload skype etc. I might want to add more software.
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Jul 4, 2011
I'm working to setup an small PC as a kiosk, I was able to create an USB pen drive with ubuntu 10.10 with a persistent area and I made all the changes I need, everything works but if the PC loss power in most of the cases the file system is corrupted. Now I'm trying to generate a non persistent USB drive, but I'm having some problems. I was able to install remastersys and create an ISO image of my system (dist) but when I tried to create the USB drive using different Programs, in all cases I get the boot menu but it never complete the login, it just try to keep booting. The only messages I saw when I create the iso image is a bunch on chown operation fail from remastsys, I'm not sure if it is part of the problem. how to create an USB read only from a persistent one ?
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Jul 16, 2011
I am using Natty in Classic Gnome mode with a custom icon set, Awoken. It is doing fine, but an upgrade was released a few days ago and the installation fails:
Code:
Preparing to replace awoken-icon-theme 2.0~ppa1~natty2 (using .../awoken-icon-theme_2.1~ppa1~natty1_all.deb) ...
Unpacking replacement awoken-icon-theme ...
[Code]....
There is a page for awoken-icon-theme package on Launchpad, but I cannot find a way to submit a bug on it. If I try "ubuntu-bug awoken-icon-theme", it is rejected because it is not an Ubuntu package. I understand that. Should I try to contact the developer directly?
How can I resolve this error and get the upgrade installed?
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Sep 1, 2011
I want to customize the installation and I'm following the instructions here.I added my packages but now the iso is much larger(about 770 MB)Now I know I can simply delete from cd-image/dists/ but then the installer fails on missing deps.How can I do this safely ?
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Nov 22, 2008
Is it possible to create custom Live Linux cd that consumes less RAM by limiting its functionalities?My laptop has 448 mb RAM and I want to run the LIVE CD along side windows xp pro(using VMware Player). I have tried a few Linux live cds but all of them are very slow when I run them inside xp!! I want to create this custom live cd so it only have firefox browser (latest version) pre-installed along with flash player (Latest version) and ability to hear voice when playing ..... videos. (I want omit the rest of programs in order that Linux runs faster). Is it possible to gain speed by omitting un wanted programs? How I can create such LIVE cd with limited functionality and fast performance.
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Feb 11, 2010
How do you create custom cursors? I found an xcursor tutorial but no installation instructions - it just left me with the cursor files.
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Sep 10, 2009
I am trying to make a Custom Ubuntu Live CD using Remastersys and an installer for the Live CD using Ubiquity. I was able to successfully create a Custom live CD using remastersys and when I boot from the custom Live CD the grub correctly displays the Custom Live CD Name that I specified during the ISO file creation using remastersys. However, when I install from the Live CD that I created, using Ubiquity, after reboot, the Grub menu displays as Ubuntu and not the Custom Label. How can I change it so that after installation, the custom Live CD name is displayed?
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Jan 22, 2010
There have been some posts on this forum about custom keyboard layouts, but the latest one was more than three years ago, and is outdated. I found the following code for a custom dvorak international keyboard layout here, but it directs me to copy this code into the folder /etc/X11/xkb/symbols/pc, a folder which does not seem to exist in 9.10 or 9.04.
Code:
As this is the only thing I felt Windows did better than Ubuntu (custom keyboard layouts), I would love to be able to change the layout and finally seal the deal with Ubuntu.
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