Ubuntu :: Preventing Bootable Media Running?
Jul 22, 2010
This is a bit of an odd one, it's not so much about using Ubuntu but about *not* using Ubuntu. I am just setting up a new computer for my daughter. I have spent days configuring parental controls and lockdowns and such to stop her from being able to view unsuitable content, download programs I don't want, anything that can mess up the computer, etc. etc. At this age I am going to be over her shoulder 100% of the time while she works anyway, but something that occurs to me is that having set up all this control software in Windows, she could actually override the entire thing really easily by booting from a live CD, USB key or similar, she can keep a whole OS in her pocket and I'd never know. You can only watch so much of the time as they grow up.Can I prevent a computer from being capable of booting from external media without some kind of password? How would you begin to go about that?
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May 4, 2010
I have a laptop (hp 8530w) with Vista and disk encryption software installed on the internal hard drive. As I cannot touch the internal hard drive, I would like to install and run Ubuntu from an external hard drive (500 hitachi in an enclosure with USB and eSata port). The idea being that when the drive is connected I run Ubuntu and when it is not the internal HDD is used to boot. I already installed Ubuntu 10.04 LTS on this external hard drive. I would like to run it using eSata interface and not USB as the former offers better performance. Unfortunately, as it turns out my BIOS does not allow me to boot directly from eSata disk. I can however boot from USB.
I thought it would be possible to install a boot loader on a USB stick and tell it somehow that Ubuntu is installed on the eSata disk and load the system from there.
I installed GRUB on a USB stick without grub.cfg. This allowed me to load GRUB and get to its shell. Here I discovered another issue. Using GRUB "ls" command the eSata drive is not listed - I can see the USB stick (hd0) and the internal drive (hd1) but no eSata drive. Not being an expert I don't know when in the boot process the eSata disk is detected. If I load Ubuntu completely from USB stick I can see it listed with "fdisk -l" command.
At this point, knowing that I can boot from USB, I'm wondering if there is any way to have a hybrid solution with USB stick storing only what's required to bootstrap Ubuntu, and then have everything else stored on and mounted to my external drive. Is there any other, better way (assuming I cannot do anything on the internal hard drive like repartitioning it, etc ...) to get to what I'm after? I know that I could boot and run Ubuntu using USB interface only but as I stated above I would like to use eSata as it offers better performance. I suppose I'm not the only one trying to do that. Unfortunately my web research did not reveal any solutions.
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Apr 9, 2011
I just tried to run the command
Code:
kexec memtest86-4.0.iso
To boot into memtest86 using kexec.
This is the output: Cannot determine the file type of memtest86-4.0.iso
How am I supposed to do this?
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Sep 2, 2010
I have a system built and running in exactly the basic configuration I want, with my recompiled kernel, extra packages, special drivers, everything works, life is good. What I want to do is take this exact setup and create an image I can copy onto a bootable USB stick. Is there a way to essentially take the contents of my hard drive and copy that onto a USB stick and then boot directly from that? The use case behind this is that I am building an embedded system of which I may have hundreds of boxes with identical hardware and software configurations. Instead of hard drives, I am going to use USB sticks for cost efficiency and maintenance. My idea is that when it's time to upgrade, I could just image a hundred new sticks and go out and swap them.
My issue is that a standard LiveCD install gets me maybe 25% of the way to a finished system. I need to recompile the kernel for realtime support with my CPU, add some fidgety drivers for some specific hardware, and install a whole bunch of additional packages. I suppose I could create a makefile(s) to replicate all the manual steps of the buildout but that seems like a lot of unnecessary complexity IF I can just image that running system as it is.
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Feb 27, 2011
I would like to build a bootable system image on an attached hard disk on a running CentOS machine.The hard disk would be moved to a headless server, where only SSH access would be available. It seems that all the documented install methods assume that the installation runs on the taget machine. In this case, I would like to create a bootable system image of CentOS on a running host system. The new install mage would generally have a newer version of CentOS than the running host system where the image is created. Also, I would prefer
to do a text-based install.
The reason for all this is that I have network access to several remote machines. I can ask disks to be moved between machines, but I have no physical access. In order to do software testing, I would like to have several system disks with different installed CentOS versions. It would be easer if I could build the system disks on one single machine. The hardware an all machines is very nearly identical.
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Mar 5, 2011
I've installed this plugin via other guides
sudo apt-get install rhythmbox-plugin-coherence
just wondering why rhythmbox won't pickup or find my ps3 media server running on my desktop? my ps3 finds it?
i've done some research around the forums and google seems i'm not the only one with this trouble....
is there an alternative server that could work for this?
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Jan 9, 2011
Im trying to install a trading program fx trading station II on a dedicated virtual server that's linux based at media temple. Any ideas on how to run the program so that the exe file isn't prompting to download the file instead of prompting the user to login and trade?
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Jun 9, 2010
creating a bootable floppy from a bootable floppy image on a NON Linux machine I am trying to install dsl (damnsmallLinux) on one of my old Compaq 2000 Deskpro machine having 256RAM and 2 GB hardisk. (which I hope to increase to 8 or 10 GB ...can I use a larger disk capacity??) I have downloaded the floppy bootable image from the website using a machine a fedora OS machine that does not have a floppy drive. I have even converted the image file to an iso file. I can copy this image file or iso file to the Compaq machine but how do I use it as a bootable floppy? OR how do I create a bootable floppy disk from this image?
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Oct 23, 2009
I have a cdrom (bootable) that I want to copy over to a usb stick, and have THAT boot the system (Adding other files to it before hand) I know it's easy, but how? I've already made a iso of the cdrom.
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May 11, 2010
How can i copy my G4L bootable CD into a partition, so thar i can boot from it, and not use the CD anymore?The idea is based in the fact that i am so lazy ... that opening/closing the CD is getting on my nerves
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Mar 23, 2011
If I dd copy a bootable usb drive to an iso will the iso be bootable?
I haven't tried it yet, but i'm going to. Heres the situation and tell me if I'm crazy.
I have several bootable CDs I use at work to do different things, so I went ahead and made a multi-boot usb stick with the isos on them and everything is golden. When i need something else, I am able to slap the ISO on the usb stick, edit the menu.lst and I'm good to go.
The problem is, for some of our equipment I have a bootable USB stick that I have to use. I tried copying the files on the bootable USB to my multi-boot usb and setup grub to boot it (which admittedly I'm no expert at), but have had no luck.
So now I'm thinking, I'll use dd to copy the bootable USB stick to an iso (using bs=2048) and then do my normal setup with an ISO and maybe it will work.
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Apr 3, 2010
I have slackware on a bootable flash drive, and the pc onto which I want to install slack won't boot from a flash drive. So how do I burn a bootable set of CDs from my flash drive?
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Mar 4, 2010
I own a legit Windows XP Home CD, with time its getting more scratches so I want to make an ISO backup. I tried Brasero but the ISO it creates doesn't seem to be bootable. I don't mind using GUI programs, but I'd prefer to know the command line programs to learn more .
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Jan 16, 2011
I was trying to change the mounting point of a usb external drive from '/media/disk' to '/media/Movies'
Here is were the stupid part takes over... I right clicked on the desktop icon for the device and selected Properties. From there I selected the Volume tab and in there I changed the mounting point to '/media/Movies' It accepted it and said the changed would take place when I unmounted it and remounted it. However, when I did this it now says it cannot be mounted as it says mount_point contains invalid characters usually /
Unfortunately, now I cannot get back into the properties to remove my error.
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Apr 13, 2011
Ubuntu10.10.i want a media player with all media codecs.it should able to play all formats of videos and audios so please suggest me a media player.(i used km player in windows i want a media player like that)
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Sep 2, 2010
I have finally gotten around to installing Ubuntu 10.4, and I really like it, but it does irk me that OpenOffice is installed by default. Is it possible to prevent OpenOffice from being installed?
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Aug 20, 2010
I recently put Linux back on my laptop (Vector) and I am trying to get any of the media players on it to recognize and play the music on my desktop, which is running Windows 7 Ultimate with WMP streaming music over my wireless network. I was wondering if this can be done, or if these features have yet, if ever, to be implemented.
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May 13, 2010
I have a headless Jaunty server that I need to access from both mac and PC clients. If the server has been rebooted, I can SSH into it, but I can not VNC into it unless I unlock the keychain. The problem is that I can't figure out how to unlock the keychain from SSH connections, so the only available method is to attach a keyboard to the physical box and enter the keychain password at the server itself.Is there a Terminal command that I can use to unlock the keychain? I have seen references to the 'security' command but that appears to be unavailable to Jaunty?
Is there an even better method than a Terminal command? I don't want to be putting passwords into the Terminal log if I can help it. Ideally, I would connect via SSH, confirm the keychain somehow, and tunnel in through VNC.
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Jul 24, 2010
I just want to prevent updates from certain repos, which are intended only for installation purposes. Those repos, however, also include updates for officially bundled packages, and i dont want to update them - just want to keep those as official versions.
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Nov 3, 2010
I do not want my windows to be dragged and placed partially in two desktops. However, I have enabled Edge flipping to move window to next desktop. My problem is with partial overlap. Something which makes the windows stay completely in the desktop, but at the same time allow edge flipping.
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May 1, 2011
I'm in the process of installing the usual Python/Numpy/Scipy/Matplotlib combination. I'm using the installed version of Python (2.7) on Ubuntu 11.04 but I've compiled Numpy and Scipy (and ATLAS/LAPACK etc.) from source. I now want to install matplotlib from the repositories but every time I do python-numpy is installed as a dependency of python-matplotlib. I've tried "apt-get hold python-numpy" etc. and also locking the version of each package in synaptic but both synaptic and apt-get will happily install the packages when requested, I assume because hold/lock version don't work on packages that aren't yet installed.
How can I prevent these packages being installed? Or is there a way to tell Ubuntu that I already have versions?
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Sep 22, 2010
Since my desktop (Ubuntu 10.4.1 for now) has no need for anyone trying to ssh into it, I want to prevent ssh from starting as a service when I boot up.
If I type: sudo update-rc.d -f ssh-agent remove
in terminal, will that stop the service for all boots (until I run: sudo update-rc.d ssh-agent defaults -- in terminal)?
I've already removed (unchecked) ssh agent key from my startup applications
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Aug 25, 2009
I have a virtualbox installation on top of CentOS, and I need fairly high security separation between host and guest traffic. The university network the box hangs off uses statically-allocated ip addresses, allocated to fixed MAC addresses (i.e. it eats any traffic with mismatched ip and MAC addresses).
Host OS: CentOS 5.3 64bit
VBox: 3.0.4
Guest OS: Fedora 11 64bit
Hardware: dual NIC, Intel server
Bridged networking, with separate NICs for host and guest
I'm aiming for high-security separation between host and guest traffic. To do this, I would like to to run all host traffic through one NIC, H, and all guest traffic through the other, G. The host and guest have separate, statically allocated, IP addresses, IPH and IPG. The network forces these to be mapped to specific MAC addresses, MACH (the address of NIC H) and MACG (the address of NIC G).
So it's not too hard to write host firewall rules to enforce this policy. The rules just have to state that traffic coming into H must have a destination compatible with IPH, and traffic going out must have IPH as source - and vv for G and IPG. There also don't seem to be any trouble telling the guest to only use NIC G. As a result, turning off NIC G (or equivalently, firewalling it off from host traffic) crashes the network, I have to reboot it to get networking working.
But I can't figure how to tell the host (i.e. CentOS) to _only_ use NIC H for anything else except the guest. Even though we don't see any IPH traffic coming into NIC G from outside, I don't seem to be able to stop the host from starting connections on NIC G. Does anyone know any way to do this - to tell the host that it can only use IPH as its IP address unless traffic is coming from a guest process, and that it can only use address MACH and NIC H?
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May 11, 2010
I've had a couple Ubuntu 8.04 servers hang hard with no terminal response.
After a given time the terminal login screen will go blank automatically. I'd like to prevent that from happening in order to hopefully catch any messages that get output to the screen before these hangs occur. Currently when the server hangs, I can mash the keyboard all I want, the screen stays blank.
I've tried 'setterm -powersave off -blank 0', but that doesn't seem to hold after logout.
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May 24, 2010
I'd like to reconfigure vsftpd so that it does not start on boot (and I can enable/disable it using service vsftpd start/stop).
Though I've seen posts in the forums that stated that upstart jobs can be disabled by moving the /etc/init/job.conf file, other sites commented that the original file will be recreated on updates.
The other two suggestions were to alter the upstart script such that either the process starts on never:
Code:
start on (never
and filesystem
and net-device-up IFACE!=lo)
stop on runlevel [!2345]
[Code]....
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Dec 15, 2010
So earlier today I was running out of space on my regular Windows 7 partition and I played around with extending it. I ended up somehow deleting grub and messing up my entire system. I've spent the last 2 hours looking for the answer to this and everyone has been saying to boot from a live disk and fix it that way.
Well, I've tried everything, the only way I can boot right now is via USB and it will NOT allow me to. I checked on other computers and even re-installed and formatted by external hard drive to try and get it to work and it refuses. I've changed my BIOS to boot from USB so I have no idea as to why this is happening. Also, I've tried using the "ls" command to find my partition via "ls (hdX,Y)/" and all of them come up as unknown filesystems.
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Mar 31, 2011
I have taken much time and effort to get Mediatomb working on my new machine running Maverick Server, with GUI. Those of you who run Mediatomb know that it's pretty convoluted to get everything "just right".I have located the three Mediatomb packages in Synaptec and marked them as "lock version" in the hope that they will not be up(side)graded to a slightly different version of Mediatomb, which does not have Javascript enabled however, update manager still insists on trying to make the change to the other version .
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Oct 31, 2009
just a quick question: I have an external HD with 2 partitions, one ext3 and one FAT32.When I plug in the HD both partitions get automatically mounted, but as I only use I use the FAT32 partition to transfer data from/to Windows machines (which does not happen so often) I would like only the ext3 partition to be mounted automatically.
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Jul 9, 2010
I am trying to lock down our application and server with iptables. Anybody have any idea how to prevent accesses to the application from another application? Basically I opened up the ports 80 and 443 for the application server. However, the application points to other apps (ie. database, ldap). I want to limit what it can connect to or who can connect to it. Bascially I can limit who connects to the server itself but the application can still get input from outside servers.
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Feb 5, 2010
I'm using the Fedora Eee kernel for Fedora 12 (it's an unofficial kernel for the Eee PC), and want to update my system (I just set it up today). How can I update via command line and prevent an update to the default kernel?
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