I thought I had written about this once before, but when I searched the site to find the solution I had come across before, I couldn’t find my post…. so, sorry if this is a duplication, but I’ve run into this on some AMD 64-bit based system boards. The most recent was based on the nvidia nforce4 chipset. Essentially in booting from either the alternative install cd or livecd for Ubuntu/kubuntu/edubuntu/xubuntu…. there is a freeze in the boot process. It goes for 30 seconds or more looking as though it’s hard frozen, but it does eventually manage to load the installer.
Category: Linux
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VMware guest unable to access USB devices
I ran into this some time back and found the solution a few months later and was reminded today to document it here…. The situation is this… Linux host for VMWare server, the guest machine has usb support and in vmware, you can go to VM, Removable devices and in spite of the fact you have usb devices on the system, nothing is listed as available to use in the VM. Well, it seems this is not an isolated problem. First you need to be sure the usb device is not in use by the host system. But, there’s something else that you need. VMWare uses usbfs to keep track of usb devices and a few distributions ( Ubuntu Linux 6.06 SUSE Linux 10.1, SUSE Enterprise Linux Server 10, Mandriva Linux 2006, SLES9 SP3 64 bit) don’t enable it by default. ( mount -t usbfs none /proc/bus/usb ) should do the trick (as root) or you could set it in fstab usbfs /proc/bus/usb usbfs auto 0 0 (and now I’m thinking I may have already posted this once…. )
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Flash Player 9 for Linux
Now… available in Beta form… The Linux version of the Flash player has been stuck at 7 for some time, while many sites require flash 8 for video/etc… (The page to find the beta download is here.)
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Ebay “sell your item” upgrade leaves linux behind?
Ebay is apparently aware of some problems with their new “Sell your item” tool and linux web browsers. The linux.com article above says that they tried with several browsers windows/linux/mac and the common denominator was linux. Even firefox on linux failed where firefox on windows worked (and the user agent switcher tool caused things to work if the agent was spoofed as being firefox on Windows.)
Ebay says they are aware and working on a solution and suggest linux users to use the 2.0 version of the sell your item tool.
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Linux Permissions Headache
Yikes, what an evening….. it started innocently enough in the afternoon. I have an old Mandrake 10.0 server that I was upgrading clamav on (recent security update). While I was at it, I was reviewing the anti-spam setup to see if I could get any better success with filtering junk mail. spamassassin has had an update since I updated this one last and also it seemed that dcc was installed, but not in active use *(no indications that it’s being used at all.) So, I set about trying to fix that and install the latest spamassassin. Somehere along the way something BAD happened. In retrospect, I’m not entirely sure how, but at one point I was root having just installed the rpms for spamassassin and then exited to my user account. Promptly on switching back to my user account I got a “permission denied” error. Eh? Ok, well let’s su again and see what’s up…. “permission denied” uh oh…. ls “permission denied” most everything actually….. permission denied.
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Running windows applications directly in linux
Linux.com has a good explanation of using binfmt_misc to directly launch a windows (or java or python) application just by typing in the application name. *(without all the contortions of … /home/user/bin/wine /home/user/.wine/c_drive/Program\ Files/Really\ Neat\ Software/Program.exe ) You do have to make the app executable under linux (chmod 755) and you can take it as far as symlinking from a directory in your path (/home/user/bin???) or the system path (/usr/bin).
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Remote tech support with anything – would I do it?
I’ve tried to ask myself if I’d trust someone enough to let them run a remote session on my own desktop to solve a problem. I think the answer is “it depends”. If you think about it, I do tech support for home users quite a bit and they let me come into their homes. If I were weighing someone coming into my house, or onto my computer desktop, I think I’d choose my desktop. …
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x11vnc slow internet initial-connection performance – identd timeout
So, I had the script all ready, I’ve got my x11vnc custom compiled to be as widely compatible as possible, I’ve tested thoroughly on the internal network. The next step was to test my x11vnc “one cut and paste” script over the internet. So, I visited my parents pc which dual-boots Windows XP and Mandrake 10.0…. I did the cut and paste into the “run command…” menu and waited and waited and waited. dropped to a console and started again, but checked that x11vnc was already running. I didn’t know what could be taking so long. I tried again and the FIRST connection gave the prompt.
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The security of remote tech support (ultravnc sc or x11vnc with wrapper script)
Well, I’ve got a nice way of doing “easy” one click (or one cut and paste) light desktop support for windows or linux, one uses ultravnc sc, the other uses x11vnc with a special wrapper script. So, what security flaws are there in this process? Well, for starters, I see the biggest vulnerability for the computer running the listening vncviewer (because it HAS to be available to the outside world.) That means the tech support desk must keep on top of vncviewer updates and keep the service turned off when not expecting a client connection. The other question that comes to mind is encryption though….
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A closer look at x11vnc
I’ve got to say, one of the things I really like about linux are the myriad of options for remotely administering a system. SSH is the one I use the most, but for the graphical you have x (especially on the LAN), nxserver (which is a compressed and optionally encrypted wrapper of the X protocol….), vnc can be used, although as I’ve noted in the prior articles one problem with either nxserver, X or vnc is that you can’t by default connect to a running X session. x0rfbserver CAN, but only if a user is logged in (as far as I know….) I found an interesting trick with x11vnc that let’s you run it even if the system is at the greeter. (the login screen for X).