Questions tagged [kernel-modules]

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1answer
34 views

selinux blocks unconfined service from loading kernel module

I have a daemon running as unconfined_service_t SELinux type, on Redhat Enterprise Linux 8: # ps -eZ | grep savd system_u:system_r:unconfined_service_t:s0 693 ? 00:00:00 savd It is trying to load a ...
2
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2answers
85 views

What do the modified times under Debian's /sys directory mean?

Earlier today I did a full system image restore from backup. Shortly thereafter when I ran: # find / -type f -printf "%TY-%Tm-%Td %TT %p\n" | sort -r I noticed the files under /sys directory had ...
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0answers
28 views

How to load ip_nat_pptp module in ubuntu?

How can the module ip_nat_pptp can be loaded in Ubunutu 18.04.2 LTS ? I need this to allow PPTP VPN passthrough.
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0answers
21 views

nft_connlimit on RHEL 8 kernel 4.18

Does anyone know what happened to nft_connlimit module on RHEL 8 for nftables? This should be available from Kernel 4.18 onwards but cannot find it anywhere in the available kernel modules. Because of ...
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0answers
65 views

Conflicting commands in CIS Benchmarks for modprobe

I was going through for the CIS Benchmarks for Oracle Linux 7. For a certain section, it recommends running these : 1) add the following to /etc/modprobe.d/CIS.conf install cramfs /bin/true 2) ...
2
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1answer
323 views

ZFS not installed into upgraded kernel (4.19)

I want to use the latest kernel (currently 4.19) with Ubuntu Server 18.04, and I also want to use ZFS. Although ZFS appears to install correctly, it apparently does not get installed into the right ...
2
votes
1answer
247 views

How to keep custom kernel modules on kernel updates installed?

I've got a NIC (Asus XG C100C) that is not properly supported in the current Linux kernel. Hence, I installed driver which I compiled from source. Every time when the kernel is updated, I have to ...
1
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0answers
234 views

RedHat 7.6\8.0 and LSI SAS 2008 controllers

Starting with versions 7.6 \ 8.0beta, RedHat has disabled support for SAS controllers on the LSI SAS 2008 chip. However, in Fedora 29 with the kernel 4.18, the controllers work. So, RedHat simply ...
0
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1answer
66 views

linux: truecrypt/veracrypt/luks/etc without /dev/loop*

I'm using a linux system without any /dev/loop* devices and without the loop module compiled into the kernel, and I don't have the option of upgrading the system or kernel. I want to use luks, ...
1
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1answer
299 views

module be2net not loaded with define parameter in /etc/modprobe.d/

I want to load the be2net module with the parameter rx_frag_size set to 4096, the default value being 2048. As specified by the documentation I created a file /etc/modprobe.d/be2net.conf with the ...
0
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1answer
23 views

How can I determine which kernel module is responsible for a specific connection showing in NetHogs?

I currently rent a dedicated server from OVH, and I was looking at nethogs to see how much connection capacity a specific process was using. I ended up, however, finding a slew of processes there that ...
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0answers
188 views

Package dependency issue, not sure safest way to proceed

I am running into a package dependency issue. Can someone help make sense of how to resolve this? Q What steps do i need to take when it says Requires: zfs-kmod = 0.7.7 Available: kmod-...
0
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2answers
282 views

Cannot Install mac80211(_hwsim) module on GCP Ubuntu 16.04 instance

I am new to GCP services and try to deploy mininet-wifi script to the cloud. On physical machines the installation described in the link and the SDN python script work pretty fine. However, for some ...
4
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1answer
352 views

How to prevent useless kernel-modules from loading?

Our Ubuntu-servers all seem to have various unused kernel-modules loaded wasting RAM and, in the case of jfs for example, running a bunch of useless processes (jfsCommit). I can use rmmod to get rid ...
2
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1answer
1k views

RHEL7.4 and DRBD 9.0/8.4 Installation

I have a fresh RHEL7.4 Server installation on which I'm trying to install DRBD 9.0 from elrepo. My server is running the latest kernel: 3.10.0-693.1.1.el7.x86_64, yet kmod-drbd90 wants to install ...
7
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2answers
6k views

UDP traffic not forwarded from Docker containers -> Docker host

I have a docker container and I am unable to run DNS lookups from inside containers, although it works fine from the docker host. The configuration management code that builds the Docker host is ...
1
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1answer
392 views

How to configure the st kernel module for LTO-6 tape drives?

I found a hint to configure the st module in a mail from 2004 redhat mailinglist about a slow LTO-2 drive. modprobe st buffer_kbs=1024 max_buffers=128 max_sg_segs=128 blocking_open=1 Are similar ...
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1answer
553 views

What are the benefits of enabling Enhanced Networking for EC2? [closed]

EC2 seems to provide a mechanism to enable Enhanced Networking for certain EC2 instance types. However, the use cases and benefits are not clearly spelled out? What are they and when is it ...
0
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2answers
5k views

Failed to find Linux Kernel Module

I`m trying to add driver for specific hardware at startup. Module file is located at /lib/modules/4.4.0-66-generic/kernel/drivers/misc/. Also I've tried /lib/modules/4.4.0-66-generic/kernel/drivers/...
4
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2answers
1k views

NFS Performance issues on Oracle Linux 6.7: Shared libraries on NFS slow down system

I am currently hunting down some performance issues on some VMWare virtual machines with the same amount of memory and cpus, running Oracle Linux 6.6 (Kernel 2.6) and 6.7 (Kernel 3.8). The machines ...
2
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0answers
558 views

ZFS on Linux: How do I correctly configure the vdev_id.conf file and trigger vdev aliasing?

I have been trying to get ZFS on Linux to read / process the vdev_id.conf file and give me a /dev/disk/by-vdev directory, to no avail. I have a SAS HBA with redundant connectivity to several hard ...
1
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0answers
632 views

STP packets dropped (1 packet every 2 seconds) when irrelevant multicast group joined on the interface

I'm trying to understand weird packet drop issue when joining particular multicast group. I think this issue is related to patch introduced in kernel ver 2.6.37 Beginning with kernel 2.6.37, it has ...
0
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0answers
426 views

nf_conntrack_ftp module has disappearedl

I've been running a Linode droplet for several years with no problems. In the last month, users have reported FTP connection errors, always related to Passive FTP. Investigation shows that the ...
0
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1answer
30 views

Do I need to compile the kernel again?

Compile the kernel, and an option I forgot to give you my card support. Do I need to compile the kernel again? $ Make && make modules_install $ Make install or is there an easier way to ...
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0answers
2k views

How to get x86_energy_perf_policy // linux-tools-* for Linux kernel 4.7.0-xyz

I am using pstate-frequency to set our server cpu's frequency. This tool needs the x86_energy_perf_policy which is provided by the linux-tools-common package. Using the distributions standard kernel ...
0
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1answer
656 views

What does the following C-State output mean?

# cat /proc/acpi/processor/CPU0/power active state: C0 max_cstate: C8 maximum allowed latency: 2000000000 usec states: C1: type[C1] promotion[--] demotion[-...
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1answer
240 views

How to find out the response time for C-state to change to higher mode

How much time does the CPU wait to go to higher mode, let's say from C0 to C1? Or if it can be customized, where can I find the current value? Also, does the the C-State changes in stages like first ...
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0answers
992 views

Kernel headers not found in Cent OS 7

I was trying to install ixgbevf drivers. # dkms build -m ixgbevf -v 2.14.2 Error! echo Your kernel headers for kernel 3.13.0-74-generic cannot be found at /lib/modules/3.13.0-74-generic/build or /lib/...
0
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1answer
2k views

How to compile drivers for Centos 7 with mainline kernel 4.5.0.0-1 from @elrepo-kernel

When using CENTOS 7 with Kernel 4.5, I can not yum install kernel-headers with the same kernel version. I am stuck on 3.10, which is what Centos comes with. How can I install Kernel-headers 4.5 and ...
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0answers
312 views

How to build configfs kernel module externally

I've used the standard make -C /usr/src/$(uname -r) M=$(pwd) modules invocation to build many out of tree modules before (ath, e1000e, etc). Despite being defined as a tristate (tristate "Userspace-...
0
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1answer
28 views

Which of these modules can I safely disable?

I'm having memory (RAM) issues in my Digital Ocean droplet, I have 3 sites with average of 300 unique visitors daily, with 2GB's of RAM and 2GB (in my opinion this should be enough) of swap... I ...
2
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0answers
93 views

Automatically build kernel modules after unattended upgrades in ubuntu

For automatic upgrades I has installed unattended-upgrades package and configured it. After each unattend kernel upgrade I must run following commands to recompile iscsi kernel modules: apt-get ...
3
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1answer
7k views

Compiling an individual kernel module (Debian/Ubuntu)

I need to modify the ELF loader's kernel implementation of an Ubuntu 14.04 distribution. Having downloaded the sources using: sudo apt-get source linux-image-$(uname -r) I ran the configuration ...
3
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2answers
3k views

iptables drops packets after POSTROUTING

I have a malware analysis environment that will intercept traffic to arbitrary domains and Internet services using InetSim. I have a sandbox that has its DNS server set to the InetSim instance, and ...
3
votes
1answer
6k views

watchdog service is not working because /dev/watchdog does not exist

There is a ITE8783 watchdog chip placed within my machine (OS Ubuntu 14.04.1). The kernel module it87 supports is. This module was not automatically loaded on startup. So I added it87 to /etc/modules. ...
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1answer
2k views

need to load xt_tcpudp module in Debian 7 Wheezy with OpenVZ kernel. Error: 'could not open'

I followed this guide IPTABLES inside container guide @ openvz.org I'm running Debian 7 Wheezy x64 which was dist-updgrade'd before installing OpenVZ. The container is Debian7 x64 minimal. It's ...
0
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1answer
2k views

How to reliable re-install nf_conntrack module after removal?

I want to remove the nf_conntrack module from debian. However I don't want to do this until I know how to get it back (if I have to), and currently am not confident about this. The steps another ...
1
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0answers
701 views

ddrescue a failing hard drive; getting a kernel module deadlock

I'm in the process of recovering a dying hard-drive with ddrescue. The utility works very well in the parts of the drive that have not problems but in the parts of the drive with problems it goes very ...
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2answers
2k views

All terminal windows suddenly disappear in Linux [closed]

Sorry in advance for the wall of text. I'm having a problem which is leaving me with very few clues as to what might be going on. Also, I apologize if ServerFault isn't the ideal place for this ...
6
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2answers
7k views

Make kernel modules available that have been deactivated on Fedora

Edit: I turned Cristians answer into a script which does everything automatically: https://github.com/frans-fuerst/magic/blob/master/fedora-activate-can.sh I need some kernel modules which are ...
1
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1answer
461 views

Iptables comment module not installed

I want to use -m comment --comment "message" in my iptables rule but do not have the module loaded. Through some searching, the module I need for this is "ipt_comment" but I do not have this installed....
4
votes
1answer
2k views

Linode Kernel Headers

I am trying to install the Idera (R1soft) linux agent on a Linode running Ubuntu 12.04LTS. The agent requires a driver which in turn requires the kernel headers. Linode uses custom kernels though so ...
2
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3answers
3k views

how (linux kernel) network modules gets loaded without modprobe.conf

how (linux kernel) network modules gets loaded without modprobe.conf I have fedora distribution installed and can see e1000e module loaded automatically in the system. Is there a configuration which ...
0
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0answers
320 views

Why is there no (Debian) init.d script for usbipd? Should I write my own?

I just installed the usbip package on my Debian Wheezy (7.1) . For some reason, it comes without an init.d script. Why is there no init.d script for it? Should I roll out my own? Or am I doing ...
1
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1answer
6k views

Disable all USB devices but keyboard/mouse/flash-drive

For security reasons, I would like to make sure no USB device can be connected to my servers running RHEL3 except keyboards, mice and flash drives. To sum up : What should work : Mouse Keyboard USB ...
0
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1answer
90 views

forcing linux kernel 3 to recognize cdrom as hdX

I have a problem with older version of anaconda linux installer. I have upgraded kernel in my distro, however, when this anaconda boot with this 3.4.52 kernel, can NOT find cdrom. As far as I ...
1
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3answers
2k views

install xenserver 6.2 on 3ware 9750 raid5

I would like to install XenServer 6.2 (kernel 2.6.32) on a raid5 managed by a 3ware 9750 controller. The XenServer installer doesn't recognize the raid5 and i think i have to load a driver for the ...
1
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2answers
1k views

Can't build RocketRaid rr268x on Ubuntu 13.04

I am trying to build the kernel module for Ubuntu 13.04 but not having any luck, I have had this card working perfectly fine with 12.10 and the 3.5.0-27-generic kernel but since upgrading to 13.04 ...
0
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1answer
184 views

Multiple ethernet interface on one ethernet card

First I must say that I am new in linux and maybe I will ask trivial question. My job is to create 8 ethernet interface to be visible in kernel, but all of them should send and receive data through ...
1
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2answers
367 views

How to run Different congestion control algorithms in FEDORA 17?

I need to use different congestion control algorithms for tcp flow. How can I continue using those flow congestion algorithms from Fedora 11 in Fedora 17?