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Questions tagged [linux-kernel]

The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems. It is one of the most prominent examples of free and open source software.

The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems. It is one of the most prominent examples of free and open source software.

The Linux kernel is released under the GNU General Public License version 2 (GPLv2) (plus some firmware images with various non-free licenses[citation needed]), and is developed by contributors worldwide. Day-to-day development discussions take place on the Linux kernel mailing list.

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How to enable/install kernel-debuginfo linux-4.14.14 on amzn-linux?

I'm on an amzn-linux instance which by default runs linux-4.9. I've compiled and booted linux-4.14.14 from source and I've compiled systemtap from source. Now I'd like to get them both working nicely together. Systemtap requires linux-debuginfo…
Michael Martinez
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Resetting / Modifying network configuration in Centos 7 Rescue mode

I've a dedicated server CentOS 7 and i made a wrong configuration for it /etc/sysconfig/network-scripts/ifcfg-enp2s0 So after restarting the network drive, the server went down .. So i've a copy of the original file and want to reset it from…
Jason4Ever
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How should we understand this 'locked for more than 120 seconds' call trace?

Yesterday a Java service in our Docker Swarm cluster suddenly stopped responding. The task (container) for this service just hung, did not answer any requests, and could not be killed. Looking at /var/log/syslog, we see the following at the time…
sbrattla
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Oracle-asm RHEL 5 Kernel Upgrade Instructions?

What are the official instructions for upgrading the oracle-asm kernel drivers when performing a kernel update on RHEL 5? I can only find documentation on a clean install of oracle-asm which includes configuration. But its my understanding is that I…
emvee
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how compile kernel and disable root access?

is it possible to restrict system to have only one root privilege access? only user "lala" and "root" have root access ? im looking for a solution to prevent hacker who hacked system to add new account on system
Nimafire
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Server appears to have little free memory despite apparent low memory usage in userspace

A Linux server I administer has been experiencing serious performance degradations as of late, becoming particularly apparent several weeks after each time it is rebooted. In particular Jenkins jobs allocated to the machine begin timing out several…
Benjamin George Roberts
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Btrfs is *not* using multiple devices

I've added a device to my existing Btrfs file system recently, but it doesn't report the new device as having even allocated any space for the data. Take a look: Before I started: # btrfs fi show / Label: 'LINUX' uuid:…
Isabell Cowan
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correlation of buffer, cache and "buffer cache"

I understand that a buffer is a location in RAM which is used by the kernel in order to cope with I/O operation between devices that operate at different speeds. Specifically, for the kernel, each block on the disk is associated with a buffer hence,…
giomanda
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Hard disk is not detecting in Lenovo Thinkserver RD450

We bought a new Lenovo ThinkServer RD450 rack server. It has two numbers of 1 GB hard disk. We configured the RAID 1 in the server, and then we started the Debian Jessie OS installation. During the installation, hard disks are not showing in the…
muruga
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Why are Centos 7 kernel updates not flagged as security updates?

I have a Centos 7.2 box. If I run a "yum check-update --security" command, I get... ... --> kernel-3.10.0-514.2.2.el7.x86_64 from updates excluded (updateinfo) --> kernel-tools-3.10.0-514.2.2.el7.x86_64 from updates excluded (updateinfo) -->…
Chris F
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How do gather flow data on linux route table without netflow

I'm trying to work out how to gather counters on how many times routes are hit in the route table without using something resource intensive like NetFlow and having to match flow data against the route table. Any ideas, are there native counters?
Alex Turner
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Opening 1 million connections maxes out at 469K

I need to configure server to handle more than one million opened websocket connections (ideally two million). I used configuration from this blogpost: sysctl -w fs.file-max=12000500 sysctl -w fs.nr_open=20000500 ulimit -n 20000500 sysctl -w…
Petr Shypila
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xtrabackup: too many open files (more than 1048576)

When using xtrabackup to backup a mysql database with lots of tables, the proces fails with Error 24: ‘Too many open files’. This is a FAQ on the Percona website:…
svdr
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What kind of trouble will it cause to run an older kernel?

I started to try to get acquainted with openvz. Following the instructions here I installed my first ever openvz server on centos 6. The first container I spawned was based on the ubuntu-16.04-x86_64 template. After creation I entered it and ran: #…
azzid
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NAT is not properly working on Linux 2.6.30

I have an Internet Gateway Device with based Linux System (Linux 2.6.30). I mad ean automatic script that open many http sessions from many LAN Stations to many Public IP address. And I add capture on the wan interface and on the LAN interface And I…
MOHAMED
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