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The repository ‘ focal Release’ does not have a Release file
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details. .
Concluzion: The repository 'http://ppa.launchpad.net/webupd8team/java/ubuntu focal Release' does not have a Rele – ppa ubuntu,ubuntu focal Release’,N: Updating from such a repository can’t be done securely,and is therefore disabled by default.,repository ubuntu,repository ubuntu 20.04 indonesia,repository ubuntu 16.04