# cat /etc/*-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.3 LTS"
NAME="Ubuntu"
VERSION="20.04.3 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.3 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
현재 버전은 20.04.3 LTS 버전이다.
이걸 21.04 로 올리려 한다.
우선
# apt-get update
# apt-get dist-upgrade
# vi /etc/update-manager/release-upgrades
Prompt=lts -> normal 로 변경
Prompt=normal
이제 업데이트 시작
# do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [819 B]
Get:2 Upgrade tool [1,272 kB]
Fetched 1,273 kB in 0s (0 B/s)
authenticate 'hirsute.tar.gz' against 'hirsute.tar.gz.gpg'
extracting 'hirsute.tar.gz'
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
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]
Reading package lists... Done
Building dependency tree
Reading state information... Done
Hit http://kr.archive.ubuntu.com/ubuntu focal InRelease
Get:1 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:2 http://kr.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:3 http://kr.archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]
Fetched 336 kB in 0s (0 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
숄라 숄라~ 어쩌구 저쩌구 나오면 다 default 로 선택 하거나 자신이 원하는 옵션으로 선택하고 다음 다음 넘어가면 된다.
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
마지막에 재부팅 하고 나면
# cat /etc/*-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=21.04
DISTRIB_CODENAME=hirsute
DISTRIB_DESCRIPTION="Ubuntu 21.04"
NAME="Ubuntu"
VERSION="21.04 (Hirsute Hippo)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 21.04"
VERSION_ID="21.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=hirsute
UBUNTU_CODENAME=hirsute
업데이트 완료 끝~!