====== Debian Linux ======
  * https://www.debian.org/
  * [[linux:debian:after_install|Debian After Install]]
  * [[https://debian-handbook.info/|Debian Handbook]]
  * [[https://www.debian.org/doc/|데비안 -- 문서]]
  * [[https://wiki.debian.org/DontBreakDebian|DontBreakDebian - Debian Wiki]]
    * [[https://www.youtube.com/watch?v=ThuIHDsxDYc|How NOT to Break your Debian System - YouTube]]

===== StableProposedUpdates & backports =====
  * [[https://wiki.debian.org/StableProposedUpdates|Debian StableProposedUpdates]]
  * [[https://wiki.debian.org/Backports|Debian Backports]]
  * [[https://backports.debian.org/Instructions/|Backports Instructions]]
  * [[https://www.youtube.com/watch?v=pcJe1LqOBv4|Backports: Newer software and kernel in Debian/Ubuntu-based distros! - YouTube]]
  * backport 패키지 설치는 명시적으로 ''apt  -t buster-backports install'' 처럼 백포트에서 설치한다는 옵션이 필요하다.
  * 대부분의 ''apt'' 명령의 경우 backports 에 적용할 때는 ''-t xxx-backports''를 주면 된다.

===== non-free / contrib repository =====
  * [[https://wiki.debian.org/SourcesList|SourcesList - Debian Wiki]]
  * [[https://www.xmodulo.com/install-nonfree-packages-debian.html|How to install non-free packages on Debian]]
  * ''/etc/apt/sources.list'' 의 ''main'' 뒤에 ''contrib'', ''non-free''를 붙여주면 된다.

<code>
# bullseye 기준
deb http://deb.debian.org/debian bullseye main contrib non-free
deb-src http://deb.debian.org/debian bullseye main contrib non-free

deb http://deb.debian.org/debian-security/ bullseye-security main contrib non-free
deb-src http://deb.debian.org/debian-security/ bullseye-security main contrib non-free

deb http://deb.debian.org/debian bullseye-updates main contrib non-free
deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free

# backports 에 대해서도 필요하면
deb http://deb.debian.org/debian bullseye-backports main contrib non-free
deb-src http://deb.debian.org/debian bullseye-backports main contrib non-free
</code>

===== kernel 삭제 =====
  * [[https://www.cyberciti.biz/faq/debian-ubuntu-linux-delete-old-kernel-images-command/|Debian / Ubuntu Linux Delete Old Kernel Images Command - nixCraft]]
  * [[linux:ubuntu:kernel|Ubuntu Linux Kernel]]