https://usado.jp/spdsk/2018/03/09/jenkins/
mmm124 CentOS7
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yum -y install java-1.8.0-openjdk
wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo
rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key
yum -y install jenkins
vim /etc/sysconfig/jenkins
JENKINS_PORT="8082"
systemctl restart jenkins
systemctl enable jenkins
systemctl status jenkins