1. 설치 된 패키지 업그레이드
현재 설치 된 버전의 모든 패키지를 최신으로 업데이트 후 진행하는 것이 가장 안전합니다.
# sudo apt-get update
è 패키지 목록을 업데이트
# sudo apt-get upgrade
è 설치 된 패키지를 최신 버전으로 업그레이드
# sudo apt-get dist-upgrade
è 의존성 변경과 관련 된 업그레이드 진행
2. do-release-upgrade 도구를 사용하여 업그레이드 진행
먼저 update-manager-core 패키지가 설치되어 있는지 확인합니다.
# sudo apt-get install update-manager-core
do-release-upgrade 명령을 실행하여 업그레이드를 진행합니다.
# sudo do-release-upgrade
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Reading cache
Checking package manager
Continue running under SSH?
This session appears to be running under ssh. It is not recommended
to perform a upgrade over ssh currently because in case of failure it
is harder to recover.
If you continue, an additional ssh daemon will be started at port
'1022'.
Do you want to continue?
Continue [yN] y
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Starting additional sshd To make recovery in case of failure easier, an additional sshd will be started on port '1022'. If anything goes wrong with the running ssh you can still connect to the additional one. If you run a firewall, you may need to temporarily open this port. As this is potentially dangerous it's not done automatically. You can open the port with e.g.: 'iptables -I INPUT -p tcp --dport 1022 -j ACCEPT' To continue please press [ENTER]Enter키를 누릅니다.
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Updating repository information Third party source disabled Some third party entries in your sources.list were disabled. Yon can re-enable them after the upgrade with the ‘software-properties’ tool or your package manage. To continue please press [ENTER]Enter키를 누릅니다.
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Do you want to start the upgrade? 14 installed packages are no longer supported by Canonical. You can still get support from the community. 10 packages are going to be removed. 104 new packages are going to be installed. 399 packages are going to be upgraded. You have to download a total of 232 M. This download will take about 46 seconds with your connection. Installing the upgrade can take several hours. Once the download has finished, the process cannot be canceled. Continue [yN] Details [d]y-------------------------------------------------------------------------------------------
설치 중 서비스 자동 재시작과 관련하여 Yes 선택 합니다.
이 후 수정 된 구성 파일에 대해 기본 버전으로 바꿀지 물어보는 메시지가 나타납니다.
default 값인 N 를 선택 (해당 패키지에 대해 잘 알고 있으면 변경해도 상관은 없음)
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현재 버전 보관 선택 합니다.
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Remove obsolete packages? 53 packages are going to be removed. Continue [yN] Details [d]y-------------------------------------------------------------------------------------------
System upgrade is complete. Restart required To finish the upgrade, a restart is required. If you select 'y' the system will be restarted. Continue [yN] y-------------------------------------------------------------------------------------------
=== Command detached from window (Fri Feb 8 14:21:27 2019) === === Command terminated normally (Fri Feb 8 14:21:27 2019) ===-------------------------------------------------------------------------------------------
SSH 세션이 종료 되면서 업그레이드가 완료 됩니다. (서버 리부팅 자동 진행)
3. 리부팅 후 버전 확인
# lsb_release –a
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No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.5 LTS
Release: 16.04
Codename: xenial
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