1 安装java (建议安装11版本的java)

sudo apt update
sudo apt install openjdk-11-jdk

安装完成后 查看下java版本是否安装完成

java -version

安装完成后输出下面的结果则表示成功

openjdk version “11.0.18” 2023-01-17

OpenJDK Runtime Environment (build 11.0.18+10-post-Ubuntu-0ubuntu120.04.1)

OpenJDK 64-Bit Server VM (build 11.0.18+10-post-Ubuntu-0ubuntu120.04.1, mixed mode, sharing)

2 安装jenkins

Ubuntu 上安装 Jenkins 相对比较直接。启用 Jenkins APT 软件源，导入源 GPGkey，并且安装 Jenkins 软件包。
用wget 获取软件源

wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -

添加源到系统中

sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'

添加源成功后执行

sudo apt update
sudo apt install jenkins

如果到此你安装成功了 那么恭喜你运气不错。。。
如果安装失败 报以下这种错

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 ******

E: The repository ‘https://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.

E: Package ‘jenkins’ has no installation candidate

那么其实很简单去官网看看是不是更新了源（搜了许多方案 都没解决 最终绕了一圈回到官网）
然后你就会发现 官网提供了稳定版的软件源 重新执行下以下命令 报错基本解决

curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key | sudo tee \
  /usr/share/keyrings/jenkins-keyring.asc > /dev/null
echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \
  https://pkg.jenkins.io/debian-stable binary/ | sudo tee \
  /etc/apt/sources.list.d/jenkins.list > /dev/null
sudo apt-get update
sudo apt-get install jenkins

然后安装后的jenkins会被自动打开 可以使用 以下 命令查看是否安装成功

systemctl status jenkins