A. Install java
Search java installation package
apt-cache search java | grep openjdk
Installation openjdk8
apt-get install openjdk-8-jdk
II. Installation jenkins
Add jenkins source
wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -
sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
The machine has been installed the update program
apt-get update
Installation jenkins
apt-get install jenkins
Three .jenkins added jdk path
System Management ---> Global jdk configuration tool path / usr / lib / jvm / java-8-openjdk-amd64
Check method ls -lrt / usr / bin / java ls -lrt / etc / alternatives / java