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Ubuntu 20.04にOpenJDK 11をインストール(OS標準)

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はじめに

Ubuntu20.04にOpenJDKを標準インストール
親記事:OpenJDKの各種インストール方法とEOLまとめ

サポート

Java Is Still Free (日本語版)では、”At least through Sept 2025” という記載がある。
ただしOSのEOLが2025-04のため、本手法で導入した場合2025-04がEOLになると思われる。
それ以降に報告された脆弱性や不具合への対応は実施されない可能性がある。

Extended Security Maintenanceで保守されるか不明。(過去バージョンでは保守されなかった)
SecurityTeam/ESM/20.04 - Ubuntu Wiki に記載される見込み。

LOG

インストール

# cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04 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

# apt update;apt install -y openjdk-11-jdk
... 略

各種確認

# which java
/usr/bin/java

# java -version
openjdk version "11.0.7" 2020-04-14
OpenJDK Runtime Environment (build 11.0.7+10-post-Ubuntu-3ubuntu1)
OpenJDK 64-Bit Server VM (build 11.0.7+10-post-Ubuntu-3ubuntu1, mixed mode, sharing)
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