I am trying to install Jenkins on my Ubuntu EC2 instance and I performed the following steps to install but couldn't install it.

$sudo apt update $sudo apt install openjdk-8-jdk $wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add - $sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list' $sudo apt update <--------- (Here I am getting below error)

root@ip-172-31-44-187:~# sudo apt update Ign:1 https://pkg.jenkins.io/debian-stable binary/ InRelease Err:2 https://pkg.jenkins.io/debian-stable binary/ Release Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 151.101.154.133 443] Hit:3 http://ap-south-1.ec2.archive.ubuntu.com/ubuntu focal InRelease Get:4 http://ap-south-1.ec2.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB] Get:5 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB] Get:6 http://ap-south-1.ec2.archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB] Reading package lists... Done E: The repository 'http://pkg.jenkins.io/debian-stable binary/ 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.

CodePudding user response：

Yeah , I had same problem with this from yesterday , I think this is after yesterday's new update in jenkins 2.303.2 Lts .

Just do , apt upgrade , apt update, apt get install jenkins -y .

It worked for me .