users April 2011

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258 participants
301 discussions

BCRYPT - Why not using it?
by johhny_at_poland77 06 Apr '11

06 Apr '11

http://unix.stackexchange.com/questions/10326/does-openbsd-use-bcrypt-by-de… Why doesn't every modern Linux Distribution use BCRYPT? http://codahale.com/how-to-safely-store-a-password/ https://secure.wikimedia.org/wikipedia/en/wiki/Bcrypt WHY????

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compile 32 bit on 64 bit machine
by Patrick Dupre 06 Apr '11

06 Apr '11

Hello, I am trying to compile a very simple application on a 64 bit machine which may run on a 32 bit machine. gcc -m32 ttt.c gives me an error: In file included from /usr/include/features.h:385, from /usr/include/stdio.h:28, from ttt.c:2: So, it seems that the include files are not correct. I also tried: gcc ttt.c -L/usr/lib/gcc/x86_64-redhat-linux/4.4.5/32 -m32 with the same error. How can I make it works ? thank. -- --- ========================================================================== Patrick DUPRÉ | | Department of Chemistry | | Phone: (44)-(0)-1904-434384 The University of York | | Fax: (44)-(0)-1904-432516 Heslington | | York YO10 5DD United Kingdom | | email: patrick.dupre(a)york.ac.uk ==========================================================================

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Installing F14 from DVD hangs
by Burkhard Plache 06 Apr '11

06 Apr '11

Hello, I am trying to install F14 from DVD on an empty Laptop. After inserting the DVD, I get the menu: 1) Install a new system or upgrade an existing system 2) Install system with basic video driver 3) Rescue installed system 4) Boot from local drive 5) Memory test I select option 1, and after a bit of fast output of the type [ time ] Message ... the system stalls after the following message: [ 3.762682] Initalizing network drop monitor service The problem re-occurs after power cycling. Is this an issue of hardware incompatibility? I have an old Fedora6 DVD, which works fine, but I would rather run a more up-to-date system. Any help appreciated, Burkhard

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Re: Using hdparm to enable diabled features of a hard drive
by Gordan Bobic 06 Apr '11

06 Apr '11

Apologies for necroposting, but I've been looking for a similar feature and the lack of it annoyed me sufficiently that I wrote a patch to add the required functionality to hdparm. Details here: http://www.altechnative.net/?p=140 Patch here: http://sourceforge.net/support/tracker.php?aid=3276513 Hopefully it'll get accepted into hdparm, but given the amount of spam I saw on the SF forums I rather doubt anyone is paying much attention there. Maybe I should open a Fedora bugzilla ticket instead... From what I can tell from my sample set, only Seagate disks seem to have this features; none of my Hitachi, Samsung, Western Digital or Toshiba disks have it, but all of my Seagates do. HTH. Gordan -------------------------------------------------------- jd1008(a)gmail.com wrote: When I issued sudo hdparm -I /dev/hdb I got, among other info, a list of commands/features, most of which are enabled, except for a few. To wit: Commands/features: Enabled Supported: * SMART feature set Security Mode feature set <<<<<<< * Power Management feature set * Write cache * Look-ahead * Host Protected Area feature set * WRITE_BUFFER command * READ_BUFFER command * DOWNLOAD_MICROCODE SET_MAX security extension <<<<<<<<<<<< * Automatic Acoustic Management feature set * 48-bit Address feature set * Device Configuration Overlay feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART error logging * SMART self-test * General Purpose Logging feature set * WRITE_{DMA|MULTIPLE}_FUA_EXT * 64-bit World wide name Write-Read-Verify feature set <<<<<<<<<< * WRITE_UNCORRECTABLE_EXT command * {READ,WRITE}_DMA_EXT_GPL commands * Segmented DOWNLOAD_MICROCODE * Gen1 signaling speed (1.5Gb/s) * Gen2 signaling speed (3.0Gb/s) * Native Command Queueing (NCQ) * Phy event counters Device-initiated interface power management <<<<<<<< * Software settings preservation * SMART Command Transport (SCT) feature set * SCT Long Sector Access (AC1) * SCT LBA Segment Access (AC2) * SCT Error Recovery Control (AC3) * SCT Features Control (AC4) * SCT Data Tables (AC5) unknown 206[12] (vendor specific) So, my questions are: a. how can I use hdparm to enable write/read verify? That's what I am interested in. Man page does not mention this.

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ecryptfs: Unable to link the KEY_SPEC_USER_KEYRING into the KEY_SPEC_SESSION_KEYRING
by Nick Urbanik 06 Apr '11

06 Apr '11

Dear Folks, when I do: # mkdir secret $ sudo mount -t ecryptfs secret secret Unable to link the KEY_SPEC_USER_KEYRING into the KEY_SPEC_SESSION_KEYRING; there is something wrong with your kernel keyring. Did you build key retention support into your kernel? $ lsmod | grep crypt ecryptfs 89320 0 I've had this work on my laptop. Why not on my x86_64 F14 box with all updates applied? Google turns up the same question, unanswered, in the Fedora forums. Any ideas or suggestions welcome. -- Nick Urbanik http://nicku.org nicku(a)nicku.org GPG: 7FFA CDC7 5A77 0558 DC7A 790A 16DF EC5B BB9D 2C24 ID: BB9D2C24

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Booting USB squashfs with CD
by theblues gnr 06 Apr '11

06 Apr '11

Hi, I'm trying to install Fedora on a MacBook but ran into a problem. Basically, the computer's CD drive is not working properly so it will fail to load the image from the disc half way through, with errors. I also can't boot from a USB stick, since this is a MacBook. So my question: is there any way to use the CD to load the kernel and initrd with isolinux, but then load the system image from the USB drive? Looking at the configuration options in isoloader, I see the following line:vmlinuz0 initrd=initrd0.img root=live:CDLABEL=Fedora-15-Nightly-20110403.17-i6 rootfstype=auto ro liveimg quiet rhgb rd.luks=0 rd.md=0 rd.dm=0 I suppose if there is a way to load it from the USB stick I'd have to change the root option, from "live" to something else. What would that be? Anyway, that's as far as I got so far. Appreciate any help. I have the lateste F15 nightly on a CD and USB stick (created with abock-image-writer). Thanks in advance!Mark

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verifying the boot.iso for fedora 15
by Joel Rees 05 Apr '11

05 Apr '11

How does one verify boot.iso for the alpha version? I've imported the key file, but I don't see a proper signature or an sha256 checksum.

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XEN vs VirtualBox
by Luc MAIGNAN 05 Apr '11

05 Apr '11

Hi, until now, I use VirtualBox to manage several virtual machines. I have performances problems. I can see that the VMS don't use really all CPU capabilities. I think that the problem come from the CPU emulation done by VirtualBox. So I said to me that the solution is to use a real hypervisor. I planned tu use XEN for doing this. Do you think that I can really use CPU capabilities by using XEN ? Is there is way then to convert VB image to XEN domains ? Thanks for any help -- Luc RHCE

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Changing Owner on a backup drive
by Mickey 05 Apr '11

05 Apr '11

Fedora 14 I have a backup drive at sdb1 a Vfat (fat32) partition a USB hard drive that before upgrading from Fedora 13 to Fedora 14 , the owner was Michael , but after upgrade it is now owned by root. all the backup files are Linux files. The drive is mounted at /dev/sdb1 /mnt/backup from /etc/fstab and is only readable by Michael. How do I change the owner back to Michael , the chown command is not permitted.

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I am new to Linux and Fedora. Am I safe when surfing the web with default Firewall setting? Can My Computer be hacked when the firewall is in the default setting?
by Varuna Seneviratna 05 Apr '11

05 Apr '11

I am new to Linux and Fedora. Am I safe when surfing the web with default Firewall setting? Can My Computer be hacked when the firewall is in the default setting? I have no knowledge on configuring Firewalls Help Appreciated Varuna

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