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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In linux, what would happen to a running program when it's executable file has been modified or deleted?

Let's say /usr/local/bin/ruby is running in the background, and then we overwrite ruby with a different version, or even delete ruby. What will happen to those running ruby processes?
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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 ...
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2answers
98 views

Why do linux kernels include files for all devices?

The kernel for my device includes so many files for other devices and situations that my device cannot use. The kernel carries around the files for everything and is much bigger than just the files ...
0
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1answer
158 views

What to do when you can't find how your device was registered?

Before Linux Kernel 3.0 (2.6.39) I can run the following command: # ifconfig wlan0 up Now I can't. I got an error saying that this device was not found. I've tried to unplug my usb dongle, plug and ...
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0answers
14 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
25 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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0answers
11 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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4answers
405 views

Does 'urandom' share the same entropy of 'random'?

Does the entropy pool /dev/random used the same to /dev/urandom? I want to mknod /dev/random 1 9 to replace the slow random, I think the current entropy is randomly enough, if urandom is based on ...
0
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1answer
11 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 ...
2
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1answer
2k views

What kernel modules are required for wi-fi to work?

My custom-built 2.6.32 kernel cannot connect to any WPA-protected network. The kernel includes (probably?) everything that should be needed for wifi, including IPv4 network support (IPv6 is ...
0
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0answers
9 views

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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0answers
13 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, ...
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0answers
368 views

CentOS - Software raid - Kernel not booting - initrd?

Centos 5.9 64 bit on Raid 1 using mdadm. We have been trying for almost 2 days now to get this back going and have exhausted the resources and our minds on it, I would be glad if somone would point ...
2
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0answers
32 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: ...
0
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1answer
41 views

Linux Kernel Driver for video capture

I have this EasyCap video capture thing with a USBTV007 chip and I really would like to get it working on my little linux mint 17 laptop so that I can capture video for my RC stuff. But I do not know ...
2
votes
1answer
3k views

The system time has changed kernel-general, off by one day

Random events showing in event log. The system time changes to tomorrow, and then corrects about 10-15 seconds later. Causing all sorts of temproary havoc w/ VPN, Outlook, etc. Any thoughts?
2
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3answers
4k views

Linux Mint 14 severe overheating

I've tried switching to Mint (it was Mint 12) about 6 months ago, but failed to do it due to enormous overheating which made it virtually impossible to run any applications more complex than Gedit. ...
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4answers
3k views

Killing wininit.exe shuts down Windows

When I kill wininit.exe, Windows 7 suddenly shuts down. Can someone explain this using Windows mechanics? I feel like this might because the process provides something important, or this might be a ...
1
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1answer
47 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 ...
2
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3answers
877 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 ...
0
votes
3answers
3k views

How to solve this driver installation? Bus 001 Device 007: ID 05e1:0b01 Syntek Semiconductor Co., Ltd

I have a camera but i do not have a driver for Linux. So i am trying to install the driver for 05e1:0b01. But its still getting failed. Device plug/unplug shows correctly in /var/log/messages Aug ...
0
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1answer
37 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 ...
1
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1answer
41 views

How to check Intel iGPU frequency on Linux?

I own Intel Haswell G3420. At stock its iGPU has 1,15 GHz turbo frequency. In my UEFI I overclocked the iGPU to 1,5 GHz and added voltage. However the framerates in both benchmarks and games are the ...
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1answer
1k views

Logitech M560 mouse on linux sends messed up input events

My friend bought yesterday a Logitech M560 mouse (you can see it here) and tried it on her Ubuntu system. It seems to be a relatively new model, so there is no info about it anywhere, except for ...
2
votes
1answer
266 views

why does my Mac keep crashing?

(I will have to do this fast, since I think my mac will crash again.) My Mac keeps crashing. It started happening since I installed Adobe Acrobat Pro (since then I have removed it), but it might be ...
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4answers
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How do I know if my linux kernel is running in 32bit or 64bit?

When I do a cat in /proc/cpuinfo it shows a line with clflushsize : 64 Does this mean my kernel is running in 64 bits?
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2answers
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How to install usbnet driver on kernel 2.4.23-2.5-ts/

I searched in the directory "/usr/lib/modules/2.4.23-2.5-ts/kernel/drivers/net/usb/" for the usbnet but i didn't find it so how can i install the usbnet driver,i don't know where to start or how to ...
0
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0answers
26 views

Fedora: Get a list of installed kernels by Date

I want to get a list of installed kernels in decreasing order on the date which they were installed. Any idea on how to do this? I am on Fedora 20
0
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0answers
20 views

make-kpkg: how to get the correct links in /lib/modules/$version/{source,build}

I'm using make-kpkg to build custom kernel packages (linux-image-.deb and linux-headers-.deb) that I then deploy to my other Linux rigs. The linux-image package created that way creates source and ...
0
votes
1answer
50 views

why does NOT the ubuntu 13.10 have the version.h?

/usr/src/linux-header-3.11.0.12 /usr/src/linux-header-3.11.0.12-generic Neither has the version.h file in the /include/linux/. Why? That hinders the softwares installation.
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2answers
40 views

Why I can't upgrade my kernel?

I have perform the following command into ssh shell: sudo apt-get upgrade sudo apt-get update sudo reboot But I still have an old kernel version, infact: pi@raspberrypi ~ $ uname -a Linux ...
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39 views

Updating kernel on a Chromebook to prep for Chrubuntu

Pretty simple question: I have read that by setting my Chromebook to the dev channel, it will install a later kernel. Currently it's 3.4.0, and it'd install 3.8.0 (64-bit, no less). However, after ...
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1answer
72 views

how to install 'version.h' in ubuntu ?

Just now , I try to install the Jungo WinDriver in the Ubuntu 13.10 . But I am puzzled by the its manual of how to Install version.h : Install version.h: The file version.h is created when you ...
0
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1answer
194 views

Updating Chrubuntu 14.04 kernel on Acer C7 (currently 3.4.0)

There was another, similar question on this here, but it's for old ubuntu versions, and the script no longer works. While installing, the script works fine until: + vbutil_kernel --verify /dev/sda6 ...
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1answer
971 views

Errors mei_me 0000:00:03.0: timer: connect/disconnect timeout. after upgrade to 14.04

I upgraded from ubuntu 12.10 to 14.04 and now I get dmesg|grep mei [ 19.246502] mei_me 0000:00:03.0: irq 48 for MSI/MSI-X [ 24.280045] mei_me 0000:00:03.0: timer: connect/disconnect timeout. ...
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0answers
28 views

Testing Linux Kernel in QEMU gives black screen after brief text

I'm trying to run a linux kernel (version 3.14) I custom built using make menuconfig. I am trying to test it in QEMU and this is the command I am trying to run: qemu-system-x86_64 -kernel ...
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votes
1answer
36 views

How to specify this 'symbolic link' for the Jungo WinDriver?

Just now , I try to install the Jungo WinDriver in the Ubuntu 13.10 . But I am puzzled by the its manual : 4.2.3. Linux WinDriver Installation Instructions 4.2.3.1. Preparing the System for ...
0
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0answers
38 views

No COM1 port on hyper-v

I just made a fresh Windows 8.1 install and am trying to set-up a VM for kernel debugging. Therefore, I need to create a serial link to debug the VM using windbg. Usually I just simply add a new COM ...
1
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0answers
12 views

PCI configuration method error (Linux Kernel)

(I'm not sure if here is the best place for that question, so I will be pleased if anyone suggests me a more proper forum for that.) I'm trying to install Ubuntu 12.04.4 in a netbook (from an usb), ...
2
votes
1answer
35 views

Kernel panics on numerous identical systems running the same OS image

I am trying to diagnose an interesting problem that affects perhaps a dozen or more identical computers. We have an increased rate of kernel panic errors lately, yet I cannot figure out how to ...
0
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1answer
46 views

How to add iptable support to the kernel (for Wheezy/Sid release)

I am running an ARM processor (similar to the raspberry pi) and my kernel doesnt natively support iptables. If I run apt-get install iptables, it successfully installs but NAT tables are unable to be ...
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0answers
502 views

Perf samples too long, lowering kernel.perf_event_max_sample rate to

My machine freezes from time to time and I can get it working back by pressing the space key. I have this problem since two weeks now, but it was just once per day max. Now it's starting to be many ...
9
votes
7answers
10k views

Where is vmlinux on my Ubuntu installation?

I'm trying to work with starting up oprofile, and I'm running into a problem at this step: opcontrol --vmlinux=/path/to/vmlinux Ubuntu has no package called vmlinux, and when I do a locate vmlinux, ...
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2answers
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Why Centos still not using Latest kernel

As i have seen many changes and improvement in kernel 3.xx The improvement i like is dmcache which introduced in kernel 3.9 I have 3 server with centos installed on all machine Centos is still ...
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0answers
96 views

kernel panic: VFS: Unable to mount root fs on 03:02

I'm studying kernel compilation for my operating systems course. Unfortunately I'm compiling Linux v2.4.20 and Red Hat 9(yes, they're making us use it and it drives me crazy but I've NO CHOICE ...
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1answer
32 views

Windows HAL dll cannot be used anymore

I ve got this weird problem. For a long time I was running xp sp3 with /hal=halmacpi.dll switch in boot options. Everything fine. I just booted to the "old" normal mode, without the switch. (I used ...
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0answers
66 views

Windows equivalent of alt + sysrq + REISUB/REISUO

Is there a (kernel-level) Windows equivalent to the Linux Magic SysRq key combination REISUO/REISUB? i.e. Redirect keyboard to console Send a quit signal (non-forceful kill) Send a SIGKILL ...
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0answers
17 views

what do i do after editing a *.c file in the linux kernel

I have been having sound issues with the VT1802 AKA VT2002 I have copied over a possible fix into the file patch_via.c in dir /var/lib/dkms/oem-audio-hda-daily/0.201405052014~ubuntu13.10.1/build/ ...
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0answers
53 views

Mount Error (mount: page allocation failure. order:5, mode:0x40d0)

I am trying to mount mtd block on temporary file system(part of RAM). Some times mount command fails and below error comes in dmesg logs. Command: mount -t jffs2 /dev/mtdblock7 /temp/configuration/ ...
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0answers
19 views

How to tell which devices have been denied in a device cgroup?

In Linux Control Groups (cgroup), one can use the device subsystem to allow or deny access to device files. By default, all devices are allowed in the top-level cgroup. If I deny a certain device, by ...