The main component of most operating systems, the kernel manages most of a computer's communication between hardware and software. Typically, the kernel is the lowest level of abstraction a programmer can have to a resource.

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CentOS two sets of kernel packages

On my CentOS 6.2 system the rpm -qa command shows two sets of kernel packages and sources: kernel-2.6.32-220.el6.x86_64 kernel-2.6.32-220.7.1.el6.x86_64 kernel-devel-2.6.32-220.el6.x86_64 ...
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Telit modems on newer linux kernels are not recognised

I've Telit HE910 and HE910-v2 modems. After switching from 3.13-rc4 (sunxi branch) to mainline 3.17.2 I've got problems with 910. Before modem was set up properly: Jan 1 03:22:11 localhost kernel: ...
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26 views

How to upgrade a system linux in console [closed]

Big problem after an upgrading. How do I upgrade with the root console? Or how do I back-grade to the previous version? I actually can only come to the root console. I tried few things like sudo ...
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1answer
82 views

linux-headers-3.16.0-4-amd64 vs. linux-headers-3.16-3-amd64

"uname -a" returns 3.16-3-amd64 as my kernel version but I could install 3.16.0-4 via synaptic. Are these two same? OS: Debian Jessie
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1answer
37 views

Wi-Fi not showing up after kernel upgrade from 3.10 to 3.16 in Ubuntu 14.04

I upgraded the kernel in Ubuntu 14.04 from 3.10 to 3.16. My system is a Lenovo G510 59398431. After that the option “enable wifi” in the drop-down of wireless icon on the desktop is not there. Even in ...
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1answer
31 views

Virtualbox not installing because of kernel version mismatch in fedora 20

I am using this answer to install Vbox,The only problem I have is with kernel version in the second part of that answer it tells output of uname -rm and rpm -qa kernel | sort -V | tail -n 1 ...
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1answer
22 views

What could cause out_of_memory & __alloc_pages

Sadly my server is permanently hangging due to out of memory: Nov 8 07:30:43 crawler kernel: Nov 8 07:30:43 crawler kernel: Call Trace: Nov 8 07:30:43 crawler kernel: [<ffffffff800cb625>] ...
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1answer
31 views

Can anyone recommend a kernel System Filter Driver

Can anyone recommend a minifilter/systemfilter driver application that runs in kernel. I specifically want to use this to intercept calls to a device driver.
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29 views

Is there anyway to get driver commands from a windows driver .sys

Is there anyway to Sniff out driver commands for a (.sys)system file driver?
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19 views

IPV6 address removed from interfaces while I make that interface down but IPV4 address still there

Firstly I assigned IPV4 and IPv6 addresses in an interface in Linux..then I brought the interface DOWN and then again UP that interface.. The problem is that then the IPV6 addresses are removed but ...
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10 views

How can I call my own system call in a exit() system call [migrated]

I've written new system call that can terminate all the children of a given process, and I want to use this system call when user calls the "exit()" system call. In fact, The "exit" system call will ...
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1answer
28 views

How to distinguish 'syscalls' form 'int 80h' when using ptrace

As far as I know, ptrace can only get syscall number by PTRACE_SYSCALL, but syscall number is different in x86 and x64. So is there any way to figure out where this syscall real origin? I am now ...
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1answer
23 views

Are my disks waking up too often?

I have noticed a sequence of this messages in my logs: Oct 27 02:20:38 kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache Oct 27 02:20:38 kernel: sd 0:0:0:0: [sda] Stopping disk Oct 27 02:20:38 ...
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1answer
17 views

Error compiling the linux kernel 3.8.0

I am trying to compile the Linux kernel on my virtual machine which is installed Lubuntu, and I am getting the following error: In file included from ubuntu/aufs/aufs.h:45:0, from ...
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1answer
25 views

Enable KMS after logging in

Is there some way to enable KMS after booting. My linux box is set up to log into a console, with X having to be started manually if required. I do not want to enable KMS on booting, as it causes ...
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1answer
41 views

How does “explorer.exe” work and control the GUI? [closed]

All info states that this is the main shell of Windows 3.x versions and up of Windows OSes. My question is, how does this program have access to the entire GUI and screen/framebuffer data to draw and ...
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1answer
16 views

Which criteria is used by the linux kernel to pick udp source ports?

They are all of course greater than 1024, but can we narrow this range a bit more? Via wireshark the lowest I've seen is 30XXX. Does the kernel specify it's criteria somewhere?
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1answer
58 views

CentOS yum — pre-existing rpmdb issues

I'm trying to install git on a developer box and I get the following: You could try using --skip-broken to work around the problem ** Found 3 pre-existing rpmdb problem(s), 'yum check' output ...
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2answers
66 views

installing linux without any packages

I am programming a OS based on Linux but I want to "re-invent the wheel" in this OS just as an achievement. I have been told that Linux can be installed on a PC without any packages (obviously causing ...
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27 views

Linux - Encrypt folder (no kernel modules allowed)

I'm trying to encrypt a folder on the fly on Debian Wheezy or create an encrypted container. The problem is: My VPS provider doesn't allow kernel modules. So far I tried EncFS, eCryptFS, dm-crypt and ...
2
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1answer
33 views

Running native applications on the Linux Kernel

When the Linux kernel has loaded it loads the distro or OS to take over, how can I make the kernel load some native application (written in c) instead? I don't need a GUI or anything, Instead I want ...
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1answer
317 views

kernel source error on dahdi installation in centos

Trying to install dahdi from the link. I have downloaded package for dahdi. But on doing cd /usr/src/dahdi-linux-complete* make && make install && make config My terminal shows ...
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1answer
489 views

IPTables module ip_tables not found for root

We got a custom build Linux distribution from a vendor, which is not shipped with iptables enabled. root@xxxx:~# iptables -L modprobe: FATAL: Module ip_tables not found. iptables v1.4.21: can't ...
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26 views

Computer froze with black screen when viewing (not editing) video card's memory in Cheat Engine

I was looking at my computer's physical memory in Cheat Engine (a memory editor/debugger application) and I decided to look at the addresses that Device Manager says are used by my video card. When I ...
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129 views

Ubuntu 14.04 hangs at “[2.688088] Switched to clocksource tsc” (Intel Pentium 4)

I installed Ubuntu Server 14.04 on a Pentium 4 machine but booting the System hangs at: [2.688088] Switched to clocksource tsc I've tried all the Grub kernel bootoptions listed in this post: Linux ...
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27 views

kernel compilation fails at elf binary file on Mac 10.9

I am trying to compile rock chip kernel using "make -j4 kernel.img" and I get the following errors. SYSMAP System.map SYSMAP .tmp_System.map OBJCOPY arch/arm/boot/Image Kernel: ...
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23 views

Y-E DATA FlashBuster-U is not working with Ubuntu kernel

I'm using the latest Ubuntu kernel. And I can't use it at all I just get these buffer IO errors - usb 3-3: new full-speed USB device number 3 using ohci-pci usb 3-3: New USB device found, ...
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1answer
43 views

Upgrading Linux kernel module without reboot

Is there any way to upgrade linux driver module without rebooting the system ?
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1answer
255 views

Kernel-power error, automatic reset the computer

I have a problem sometimes when i run full screen application, sometimes the machines goes automatically to reboot with no warning, I was looking in the event viewer and seems to be a kernel-power ...
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1answer
51 views

How add mppe to Debian kernel 3.2.54-2 x86_64

I use debian. 3.2.0-4-amd64 # 1 SMP Debian 3.2.54-2 x86_64 GNU / Linux. I'm trying to setup pptpd, but I'm having trouble adding support "mppe". I' m searching "kernel-patch-mppe" on the debian site ...
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89 views

How to keep Linux kernel responsive while having high memory usage?

Sometimes I have a lot of programs running and despite of 16GB 8GB of memory my ubuntu linux 14.04 LTS turns out to be not responsive at all. I won't be able to get a TTY to kill some processes to ...
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1answer
18 views

ioctl to partition - disk error?

I see the following lines flooded in my /var/log/messages file. mdadm: sending ioctl 1261 to a partition The following lines were also seen but now I've fixed this issue, could this be related to ...
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36 views

What is the relationship between /3GB boot flag, PAE kernel, LargeAddressAware PE flag and 36Bit Memory addressing in Windows 32bit?

After I read that Windows 2003 Enterprise 32bit support more than 4GB, I realize that the rest editions are being crippled even when using PAE kernel (ntkrnlpa.exe / ntkrpamp.exe). So could someone ...
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1answer
22 views

How To Determine Device Data Transfer Amount

Is there a way to determine the amount of data transfered to/from a device. I'm not asking about the block or sector size. I want to know the amount transferred by a read/write operation. For ...
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28 views

Possible kernel bug?

I found this in my dmesg: [10877.030980] ------------[ cut here ]------------ [10877.030987] kernel BUG at /build/linux-baBndT/linux-3.2.60/mm/mmap.c:2275! [10877.030993] invalid opcode: 0000 [#1] ...
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linux-headers and images in ubuntu after installing vmware-tools

a noob question. Can I run dist-upgrade for linux-headers and images in ubuntu after installing vmware-tools? I ask this because i think vmware-tools also install something like a header and image ...
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17 views

loading second vm in first one w/out rebooting by use of kexec

I've two CentOS virtual machines on my win8 host's vmware. I added one of the virtual machines to another by 'add hdd' of settings of VM. The versions of Centos is 6.4 i686. I installed kexec-tool on ...
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Can I install a higher version kernel template in VM/LXC Containers

I am reading up on LXC and related Docker . I have a few basic doubts . Is it possible to install a higher kernel version into a VM Does the same apply to LXC's ? I know I need to know what are ...
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1answer
321 views

Error while compiling linux kernel

Hi I'm trying to compile a kernel on Centos 7. I've installed kernel-devel package, but it's failing as follows: [root@centos7 3.10.0-123.6.3.el7.x86_64]# LANG=C make V=1 make -f ...
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1answer
397 views

Which is the best kernel version to upgrade in Debian Wheezy?

I have Debian Wheezy kernel version 3.2.0-3-amd64 (stable). I want to upgrade my kernel version. Here there are many descriptions and source package of kernel. I red that Torvalds has been announced ...
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93 views

Thinkpad Yoga “Disk I/O Error” (Linux)

My machine is sporadically remounting the SDD readonly due to a "Disk I/O Error". This seems only to happen when I connect to the laptop to a power source or after resuming from suspend. The SSD ...
2
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0answers
140 views

How to stop jbd2 to release a device

In an AWS EC2 instance, we have multiple EBS volumes. When I try to detach any of them, the umount command works, but the device can't be detached. # grep -c xvdj /proc/mounts 0 However, lsof ...
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0answers
35 views

What actually happens when computer hangs [closed]

When we come to a point where computer hangs, what does actually happen inside of Windows's or Linux's kernel? Could a user space application be the cause that a whole os i frozen or could it just ...
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42 views

How to apply a kernel patch from lkml?

How do I patch the kernel from a patch from lkml? Specifically this link : https://lkml.org/lkml/2014/5/9/517 I am running debian. I know how to roll a deb package, but I can't figure out how to do ...
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1answer
55 views

remotely boot into different kernel version

I have a remote machine with Ubuntu 12.04 and the following kernel versions installed: :/lib/modules# ls 2.6.39.4 3.0.0-21-generic 3.2.0-25-generic 3.2.0-25-generic-pae 3.2.0-27-generic ...
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Is ramdisk_size still needed with a .cpio initrd?

I'm creating a rescue system with the following two files: rescue.linux (version 3.2) initrd.cpio The initrd.cpio file can be quite large, larger than the default 4MB of a ramdisk. However, it ...
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25 views

kernel configuration: select specific drivers or symbols regardless of dependencies?

Is there a way in "make menuconfig" et al. to start with enabling device drivers that you want included, and have it enable the necessary (dependent) generic options and APIs automatically? As it is, ...
2
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0answers
220 views

Stuck on GRUB command prompt after regular kernel update

I am running Debian Wheezy. Update Manager suggest to install kernel update. After update, I reboot system but instead of listing all the kernels (bootloader), it gave me a GRUB command prompt: ...
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1answer
130 views

Debian boot hangs

I created a Debian USB stick image from the experimental repo with the latest kernel 3.15 RC8, used Syslinux. I wrote the image on a USB stick and I booted from it on two different computers. On the ...
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1answer
181 views

What is the difference between “make modules” and “make modules_install”

I'm currently looking up compiling a custom kernel and I find various guides that first say make modules and then make modules_install in the step when you compile and install the modules while other ...