バージョンを確認

cat /etc/os-release

アップグレード可能バージョンを確認

sudo do-release-upgrade -c
# New release '22.04.1 LTS' available.
# Run 'do-release-upgrade' to upgrade to it.

アップグレード実行

sudo do-release-upgrade
Please install all available updates for your release before upgrading.

とでたので、モジュール群をアップデート。

sudo apt update
・・・

再実行

sudo do-release-upgrade

確認

cat /etc/os-release
PRETTY_NAME="Ubuntu 22.04.1 LTS"
NAME="Ubuntu"
VERSION_ID="22.04"
VERSION="22.04.1 LTS (Jammy Jellyfish)"
VERSION_CODENAME=jammy
ID=ubuntu
ID_LIKE=debian
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"
UBUNTU_CODENAME=jammy