리눅스용 도커 설치 3분 부분에서 명령어를 잘못 쳤습니다.

명령어 손으로 따라치다보니.. (복사가 안되지 않나요? 저만 안되나요?)

아 이럴수가 저만 안되는가 싶어서 PDF 다시 가보니까 손모양으로 돼있는걸 편집 모양으로 바꾸니까 복사가 되네요..

시작부터 질문드리게 돼서 죄송합니다.

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"

저 위에 amd 부분을 adm64로 적었습니다 ㅜㅜ

그것도 모르고 버전때문인가 설치 명령어가 바뀌었나 싶어서 막 이거저거 해봤는데 유심히 메시지를 보니까 

apt 업데이트 할 때 마다 adm64 라는 폴더가 생긴건지 아니면 어떤 흔적이 남았는지 그 부분에 대한 에러가 계속 나더라구요.

sudo apt update
Hit:1 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu focal InRelease
Get:2 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:3 http://ap-northeast-1.ec2.archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Hit:4 https://download.docker.com/linux/ubuntu focal InRelease
Hit:5 http://security.ubuntu.com/ubuntu focal-security InRelease
Fetched 214 kB in 0s (484 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
4 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: Target Packages (stable/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60
W: Target Translations (stable/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60
W: Target CNF (stable/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60W: Target CNF (stable/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60
W: Target Packages (stable/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:60 and /etc/apt/sources.list.d/docker.list:1
W: Target Packages (stable/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list.d/docker.list:1
W: Target Translations (stable/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list.d/docker.list:1
W: Target CNF (stable/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list.d/docker.list:1
W: Target CNF (stable/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list.d/docker.list:1
N: Skipping acquire of configured file 'stable/binary-adm64/Packages' as repository 'https://download.docker.com/linux/ubuntu focal InRelease' doesn't support architecture 'adm64'
W: Target Packages (stable/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60
W: Target Translations (stable/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60
W: Target CNF (stable/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60W: Target CNF (stable/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list:60
W: Target Packages (stable/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:60 and /etc/apt/sources.list.d/docker.list:1
W: Target Packages (stable/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list.d/docker.list:1
W: Target Translations (stable/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list.d/docker.list:1
W: Target CNF (stable/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list.d/docker.list:1
W: Target CNF (stable/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:58 and /etc/apt/sources.list.d/docker.list:1

제가 생각하기로는..

"명령어를 잘못쳐서 어떤 폴더나 어떤 흔적같은게 생겼는데 apt업데이트가 그것을 업데이트 하려다가 실패하는구나." 라고 느끼고, 그럼 단지 저것만 문제일 뿐일테니 도커는 잘 설치 되겠구나 싶어서 설치는 잘 마친 상태입니다.

이대로 그냥 쓰면 되고, 다시 하면 실수 할 일 없겠고, 어차피 연습용이고, 진도도 따라갈 수 있고 상관 없지만..

저런 경우에 고칠 수 있는 방법이 있는지 최소한 무슨 에러인지라도 알고싶어서 질문 드리게 됐습니다.