This tag is for questions about the internals of the Linux kernel itself - particularly about use or configuration of kernel modules or drivers.

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1answer
191 views

Missing kernel on debian-testing-amd64-DVD-1

I want to install the Debian testing linux version. But at a certain point of the installation, an error occurs: Impossible to install kernel. a compatible kernel version is missing. … or ...
2
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1answer
110 views

Oracle Virtualbox on statically compiled kernel

I can't seem to find any documentation on the subject. I'm working on putting together a linux install for a fairly "dirty" environment. Best practice there would be a statically compiled kernel ...
1
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1answer
259 views

Sudden machine reboots observed with ipmiutil watchdog timer

Originally raised on serverfault as this question. I've got a production openSUSE 11.1 2.6.34.4 Intel server with a standard ipmiutil-2.4.1 installed. The watchdog is basically a 90 second hardware ...
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1answer
784 views

L3 cache disabled in Ubuntu 11.04

I have installed Ubuntu 11.04 64bit .. After checking my CPU cache it shows that 3MB cache is disabled. see below : $ sudo lshw description: Notebook product: SATELLITE C660 (PSC1SE-00G009AR) ...
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3answers
2k views

Can I install Linux on a USB flash drive?

I want to install Red Hat Linux on my flash drive. Is there a way that I can do this? I tried a lot found through searching, but couldn't get a satisfactory answer. In fact, if I try the same for ...
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0answers
374 views

Debian Squeeze, linux-image-2.6.32-5-486: Boot process halts with [<c1003997>] ? kernel_thread_helper+0x7/0x10

I just upgraded an old box from Debian Etch to Lenny, and then from Lenny to Squeeze. Upon getting the system up to Squeeze, I installed the latest 2.6 kernel, linux-image-2.6.32-5-486. When I ...
0
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1answer
985 views

How to add ahci module to linux-image-2.6.38-11-virtual kernel?

I just installed Ubuntu 11.04 with the linux-image-2.6.38-11-virtual kernel as a virtual machine in VirtualBox (4.1.2). When I booted the machine after installation, I got this error message: FATAL: ...
3
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3answers
2k views

Unmounting Detachable devices (eSATA,USB storage) in Linux

A detachable device like eSATA, USB drive can be abruptly removed (by simply pulling the plug). If there are open file handles on a partition, then this partitions won't unmount, i.e. the Linux ...
0
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1answer
121 views

user not able to access the file which has privilege via group

I am facing the below problem in linux kernel 2.6.18-7.1 I created user "BBC" using adduser -D after this /etc/passwd contains "BBC:x:1010:1010:Linux User,,,:/home/BBC:/bin/sh" I created group ...
3
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1answer
156 views

Should I compile the linux kernel in the git repository itself?

This is about common practices. I have a git repository containing the linux kernel. Now I want to build this linux kernel. Should I copy the sources outside the git repository and then build the ...
2
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2answers
5k views

How do I set up grub2 with Xen?

I am booting a new Xen kernel and it all goes fine up until some point during the boot process when the machine reboots without warning. Unfortunately, I don't see errors flash up just before that ...
1
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1answer
185 views

Building the Linux kernel: compute intensive or disk I/O intensive?

I am trying to explain some results that I got from a recent benchmarking experiment. For that I need to know whether compiling the Linux kernel is a compute intensive task or a disk I/O intensive ...
0
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1answer
328 views

Linux kernel compilation taking over 4 GB of temporary disk space

I am trying to compile linux kernel 2.6 and am shocked to see it is taking over 4 Gigs of disk space. It is also taking around 80 minutes to compile. Is it normal ? Or am I doing something wrong ? ...
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3answers
2k views

How does route -n work in Linux?

I can understand the output of strace route -n, but does route really read any of the files in /proc to get the routing table? Also, if the routes and IP addresses are stored under /proc, why doesn't ...
0
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1answer
959 views

Kernel panic when trying to setup rootfs over NFS on ARM board

I have a ARM board on which I am trying to configure NFS so that the rootfs will be mounted over a network. How can I resolve this? My server configuration: OS: Scientific Linux 6.0 My NFS shares: ...
5
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2answers
6k views

how to totally clear the filesytem's cache on linux?

In a performance test, I want to bypass the influence of cache of linux system (including page cache/inode cache and so on). I have tried O_DIRECT flag, but it's turned out that direct I/O is still ...
1
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1answer
792 views

Setting /proc/sys/vm/overcommit_memory to 1 and then exhausting addresses

As I understand it, setting /proc/sys/vm/overcommit_memory to 1 is supposed to make sure malloc always succeeds, and set the OOM killer loose if there's an actual memory problem. I'm wondering what ...
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0answers
68 views

Unified file system across Windows and Linux for type-2 hypervisor

Is there anyway to map a Windows disk partition( c:/, d:/) to Linux (running as guest on top of Windows host Type-2 hypervisor)? There are few solution like a shared folder in VirtualBox, however, ...
0
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1answer
427 views

Ubuntu is running in low-graphics mode

This error appears during Ubuntu 10.04 start up and I can run in low graphics mode. I tried to install the NVIDIA driver and then it works but when I reboot Ubuntu this error appears: (EE) NVIDIA(0): ...
0
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1answer
409 views

What's new in Linux 3.0? [closed]

Linus Torvalds just announced that he's releasing version 3.0-rc7. So what's new in Linux 3.0 when it comes to: Architecture Stability Security Hardware support etc
2
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1answer
440 views

Out of space while bulding Linux kernel

I am trying to build Linux kernel. I am getting out of space after a while. I unpacked it in /usr/src directory. It seems I have plenty of space. Can you please let me know what can be done about it. ...
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5answers
9k views

What does “sudo -s” actually do?

I am using ubuntu 10.04. I notice that after I run "sudo -s" in terminal, the prompt changed from "XXX@XXX" to "root@XXX", seems it changed to root privilege. But when I check the ...
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2answers
1k views

How to run linux 0.01? [duplicate]

Possible Duplicate: Running linux kernel 0.01 in a virtual machine How can I run Linux 0.01 on my laptop? If it's possible to run it, could you tell me how? Here you can download the ...
0
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3answers
807 views

PATH is not permanently stored in file

I'm a newbie to Ubuntu. I want to add some variables to my PATH - I am using the following steps: Open a terminal window. Type the following commands: export GOROOT=/home/linux/go/hg export ...
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6answers
14k views

How do I uncompress vmlinuz to vmlinux?

I have already tried uncompress, gzip, and all other solutions that come up as google results and these have not worked for me. To get just the image search for the GZ signature - 1f 8b 08 00. ...
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0answers
758 views

Setting up a Remote Diskless System

I am trying to setup a PXE Boot server with RHEL 6 and am following these directions. Has anyone done this successfully?? I am having various issues. I used the rsync command to copy over the ...
2
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2answers
788 views

Running linux kernel 0.01 in a virtual machine

I'm just trying to know if is there is a way to run the first version of linux in a virtual machine. Since I am very new to this, my aim is to learn something basic on how the first version of linux ...
1
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1answer
308 views

Linux - Whitelist hardware devices

For security purposes, is it possible to have the operating system enforce a whitelist of hardware devices? This means that plugged in devices that are not in the whitelist will be ignored at an as ...
4
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2answers
396 views

Is it possible to boot a consumer i7 system with a Xeon processor and ECC memory?

I have read a couple of blog posts on the Internet that appear to imply one can boot at least some i7 motherboards with unbuffered ECC memory and a Xeon 43xx processor installed. I can boot my MSI ...
0
votes
1answer
610 views

Linux I2C Communication from Kernel Space

How do you interface with the Linux I2C driver from kernel space? For example, if I had LEDs connected to a GPIO expander on the I2C bus, how would I blink them twice before going down for reset from ...
2
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0answers
224 views

Linux kernel 2.6 - layer 7 support?

From what I found on the Internet, Layer7 classifier support is not merged into the current kernel (as of 2.6.39-rc6) and can be achieved with a patch. Is it known when (if ever) the support will be ...
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1answer
231 views

Exec Shield patch

The Exec Shield patch was removed from the Debian repositories a few months ago. Where can I download the patch ? I found this link but files are from 2006: Ingo Molnar link
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3answers
275 views

can't use console in Linux

I have some problem with Linux, I switch graphic interface to the console using Ctrl + Alt + Shift + F1, but I can't type anything, every second I receive: my question is, why can't I type ...
3
votes
1answer
3k views

`cat /proc/kmsg` outputs broken text

cat /proc/kmsg is convenient way to follow kernel messages. But the output is unreliable. Example: < eoyfl-o-ilF ilaltssI hwflssesJ a hwbctaealatv-psL hwmmr-sg()nc-l-TtssN oeOfso-eitr()so-l-iesQ ...
4
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3answers
487 views

Pipe kernel messages to another process as they occur

I have an OLED screen on my laptop that I have configured to show status information. The current driver I have installed in Linux for it is able to display messages by sending them to a script as an ...
0
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2answers
11k views

Mounting External Hard Drive on Red Hat

I have Red Hat Enterprise Linux 6 installed on my machine. I am unable to mount an External Hard (NTFS). I have tried several options which are as under: Option 1 After making a dir /media/windows ...
3
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2answers
2k views

pinning process to a CPU

I wish to pin a process to a CPU1 in my dual CPU machine - how can I do it in Linux - any pointers ?
0
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0answers
619 views

error while loading new compiled Linux kernel image into the android emulator(1.5) [duplicate]

Possible Duplicate: reboot failed error while loading new zImage in the android emulator I have successfully compiled Linux kernel for android: root@ubuntu:~/common# ARCH=arm ...
4
votes
1answer
452 views

Where did SELinux go?

I am compiling a new kernel, and want to enable SELinux but don't see it in menuconfig anywhere. The only framework under security options is Tomoyo.....so I ask, what happened to SELinux? Both ...
5
votes
4answers
8k views

How to search by content on Ubuntu

I'd like to search the entire server by content. (text file) When I try grep -rl "text here", it freezes. How would you do it? And how long does it usually take?
0
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1answer
333 views

WLAN LED randomly blinking when there is no traffic

I've got a Linksys WUSB54GC WLAN USB interface (Ralink chipset) and I'm running Debian GNU/Linux 6.0. The LED very often randomly blinks although there is no traffic in the network. I checked this ...
1
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5answers
21k views

Where can I find linux-kernel-headers-x.x.x.x for SUSE?

I'm installing VMware Workstation on a SLED 11 SP1, and the installation is blocked by an error message "Kernel headers for version 2.6.32.27-0.2-default were not found". If you installed them in a ...
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2answers
1k views

Compile linux kernel for different machine

I am new to kernel development, and I have to compile a kernel with some specific features and then install it on some machines. The problem is that these machines are slow, and hence I want to ...
0
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1answer
411 views

Interrupt Descriptor Table and System Call Table?

Anyone please help me find out the relation between these two. Read somewhere that "The IDT is initialized one first time by the BIOS routine but Linux does it one more time when it take control." ...
2
votes
2answers
1k views

lsmod and /proc/modules

I can get a list of modules using either lsmod or cat /proc/modules. Do the two approaches use the same mechanism to retrieve the modules? I want to know this as we could use it to find some hidden ...
1
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1answer
249 views

Why is the Linux Boot Sequence organised the way it is…?

Why is the Linux boot sequence is organized the way it is? Power on + BIOS runs hardware initialisation and self tests, LILO/GRUB etc... but why is it organised the way it is? Would I be right ...
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3answers
635 views

Compiling the Linux kernel

Just for the learning experience, I have recompiled the Linux kernel with different options, installed and booted from it. It was both instructive and straightforward. However, I was overwhelmed by ...
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0answers
97 views

kernel 2.6.36 not booting

I m a newbie to kernel programming. I am trying to boot the kernel 2.6.36 on my ECG machine.It was working perfectly on 2.6.33.2. It is getting stuck on this step: ## Booting kernel from Legacy Image ...
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1answer
2k views

What do these error messages mean and how to fix it?

============================================================== actually I figured out this is an issue of intel video driver:http://lkml.indiana.edu/hypermail/linux/kernel/0902.3/01703.html ...
4
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2answers
52 views

How to remotely test the linux install CD for integrity

if you do, after the completing the test - it will eject the CD. and how are you going to reinsert the CD to complete your install? you're remote remember ??