Kernel log tips and tricks: Difference between revisions

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== See Also ==
{{Status
* [[Kernel]]
|status=Draft
|owner=Knowledge Agent
|last_update=2026-07-16
|review=Pending
}}
 
{{TOC}}
 
== Overview ==
 
Kernel log tips and tricks에 대한 기술 문서입니다.
 
=== Summary ===
 
* 무엇인가? - Kernel log tips and tricks
* 왜 필요한가? - HPC 및 서버 환경에서 필수 개념
* 언제 사용하는가? - 서버 구성, 성능 튜닝, 문제 해결 시
 
 
== Purpose ==
 
이 문서가 존재하는 이유
 
* Goal: Kernel log tips and tricks에 대한 기술 정보 제공
* Scope: Kernel log tips and tricks의 개념, 사용법, 설정
* Non-goals: 다른 주제로의 확장
 
 
== Key Concepts ==
 
{| class="wikitable"
! Concept
! Description
! Related
|-
| Kernel log tips and tricks
| HPC/서버 환경에서 중요한 기술 개념
| [[Linux]], [[Server]]
|}
 


== Detailed Explanation ==


== failed to load module mdraid: libbd_mdraid.so.2: cannot open shared object file: No such file or directory ==
* [[Kernel]]
Install required libraries
Install required libraries
$sudo apt-get install libblockdev-crypto2 libblockdev-mdraid2
$sudo apt-get install libblockdev-crypto2 libblockdev-mdraid2
== nvidia: module verification failed: signature and/or required key missing - tainting kernel ==
Todo
Todo
== Sub-process /lib/systemd/systemd-networkd-wait-online returned an error code (1) ==
Increase default timeout value  
Increase default timeout value  
sudo systemctl edit --full [[systemd-networkd]]-wait-online.service
sudo systemctl edit --full [[systemd-networkd]]-wait-online.service
Change the following line, by adding "--timeout-10":
Change the following line, by adding "--timeout-10":
ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --timeout=10
ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --timeout=10
== ERST: Error Record Serialization Table (ERST) support is initialized ==
If system include any watchdog settings in the [[BIOS]]? If such a hardware watchdog is enabled in BIOS, then you must either install the appropriate watchdog driver (which may be proprietary and only available for some distributions) or disable the watchdog
If system include any watchdog settings in the [[BIOS]]? If such a hardware watchdog is enabled in BIOS, then you must either install the appropriate watchdog driver (which may be proprietary and only available for some distributions) or disable the watchdog
Install packages
<code>sudo apt-get install libblockdev-crypto2 libblockdev-mdraid2</code>
Verify
<code>/usr/lib/x86_64-linux-gnu/libbd_mdraid.so.2</code>
<references />
<nowiki></nowiki>


== Failed to load module mdraid: libbd_mdraid.so.2: cannot open shared object file ==
Install packages


<code>sudo apt-get install libblockdev-crypto2 libblockdev-mdraid2</code>
== Best Practices ==


Verify
* 최신 버전 사용 권장
* 공식 문서 참고
* 테스트 환경에서 먼저 검증


<code>/usr/lib/x86_64-linux-gnu/libbd_mdraid.so.2</code>


== References ==
== References ==
<references />
 
* [https://wiki.hpcmate.com Kernel log tips and tricks]
 
 
== Related Pages ==
 
* [[Linux]]
* [[Server]]
* [[Hardware]]
* [[Network]]




<nowiki></nowiki>
[[Category:Linux]]
[[Category:Linux]]
== Knowledge Graph ==
Related
→ [[Linux Kernel Tuning]]
→ [[THP (Transparent Huge Pages)]]
→ [[Kernel tips and tricks]]
→ [[Kernel boot param]]
→ [[Linux Kernel]]
→ [[Tunable kernel params]]


[[Category:Reference]]
[[Category:Configuration]]

Latest revision as of 11:29, 17 July 2026

Template:Status

Template:TOC

Overview

Kernel log tips and tricks에 대한 기술 문서입니다.

Summary

  • 무엇인가? - Kernel log tips and tricks
  • 왜 필요한가? - HPC 및 서버 환경에서 필수 개념
  • 언제 사용하는가? - 서버 구성, 성능 튜닝, 문제 해결 시


Purpose

이 문서가 존재하는 이유

  • Goal: Kernel log tips and tricks에 대한 기술 정보 제공
  • Scope: Kernel log tips and tricks의 개념, 사용법, 설정
  • Non-goals: 다른 주제로의 확장


Key Concepts

Concept Description Related
Kernel log tips and tricks HPC/서버 환경에서 중요한 기술 개념 Linux, Server


Detailed Explanation

Install required libraries $sudo apt-get install libblockdev-crypto2 libblockdev-mdraid2 Todo Increase default timeout value sudo systemctl edit --full systemd-networkd-wait-online.service Change the following line, by adding "--timeout-10": ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --timeout=10 If system include any watchdog settings in the BIOS? If such a hardware watchdog is enabled in BIOS, then you must either install the appropriate watchdog driver (which may be proprietary and only available for some distributions) or disable the watchdog Install packages sudo apt-get install libblockdev-crypto2 libblockdev-mdraid2 Verify /usr/lib/x86_64-linux-gnu/libbd_mdraid.so.2


Best Practices

  • 최신 버전 사용 권장
  • 공식 문서 참고
  • 테스트 환경에서 먼저 검증


References


Related Pages

Knowledge Graph

Related

→ Linux Kernel Tuning → THP (Transparent Huge Pages) → Kernel tips and tricks → Kernel boot param → Linux Kernel → Tunable kernel params

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