I need to install Jenkins on Ubuntu 20.4.1.
I've completed the following:
apt-get -y install openjdk-8-jdk(it's Java 14.0.1)
wget -q -O - http://pkg.jenkins-ci.org/debian-stable/jenkins-ci.org.key | apt-key add -(responds "OK")
sudo sh -c 'echo deb https://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'(file exists and has this one line in it)
sudo apt update, responds:
Hit:1 http://de.archive.ubuntu.com/ubuntu focal InRelease Hit:2 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease Hit:3 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease Hit:4 http://de.archive.ubuntu.com/ubuntu focal-security InRelease Ign:5 https://pkg.jenkins.io/debian-stable binary/ InRelease Get:6 https://pkg.jenkins.io/debian-stable binary/ Release [2,044 B] Get:7 https://pkg.jenkins.io/debian-stable binary/ Release.gpg [833 B] Ign:7 https://pkg.jenkins.io/debian-stable binary/ Release.gpg Reading package lists... Done W: GPG error: https://pkg.jenkins.io/debian-stable binary/ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FCEF32E745F2C3D5 E: The repository 'http://pkg.jenkins.io/debian-stable binary/ Release' is not signed. 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.
sudo apt install jenkins, responds:
root@ubuntu-server:~# sudo apt install jenkins Reading package lists... Done Building dependency tree Reading state information... Done Package jenkins is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'jenkins' has no installation candidate
What do I have to do so that
apt finds the Jenkins package so it can be installed?