Jenkins on RHEL

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Installation of Jenkins on RHEL
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Getting the repo
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[root@dhcppc5 ~]# wget -O /etc/yum.repos.d/jenkins.repo 
Importing Key
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[root@dhcppc5 ~]# rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key
Install package
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[root@dhcppc5 ~]# yum install jenkins -y
Check the version
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[root@dhcppc5 ~]# rpm -q jenkins
jenkins-2.108-1.1.noarch
Install Java
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[root@dhcppc5 ~]# yum install java -y
Check the status of Firewall
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[root@dhcppc5 ~]# systemctl status firewalld
If firewalld is running either stop the firewall or add rules to the firewall
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Stop and disable firewall
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[root@dhcppc5 ~]# systemctl stop firewalld && systemctl disable firewalld
Adding rules to the firewall
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[root@dhcppc5 ~]# firewall-cmd --permanent --new-service=jenkins
success
[root@dhcppc5 ~]# firewall-cmd --permanent --add-service=jenkins
success
Reload the firewall after adding rules
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[root@dhcppc5 ~]# firewall-cmd --reload
success
Check the list of Firewall
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[root@dhcppc5 ~]# firewall-cmd --list-all
Start and enable jenkins service
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[root@dhcppc5 ~]# systemctl restart jenkins && systemctl enable jenkins
Check the status of jenkins service
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[root@dhcppc5 ~]# systemctl status jenkins
● jenkins.service - LSB: Jenkins Automation Server
  Loaded: loaded (/etc/rc.d/init.d/jenkins; bad; vendor preset: disabled)
  Active: active (running) since Fri 2018-02-23 10:23:32 IST; 35s ago
    Docs: man:systemd-sysv-generator(8)
 Process: 25923 ExecStart=/etc/rc.d/init.d/jenkins start (code=exited, status=0/SUCCESS)
  CGroup: /system.slice/jenkins.service
          └─25948 /etc/alternatives/java -Dcom.sun.akuma.Daemon=daemonized -Djava.awt.headless=true -DJENKINS_HOME=/va...
Feb 23 10:23:27 dhcppc5 systemd[1]: Starting LSB: Jenkins Automation Server...
Feb 23 10:23:27 dhcppc5 runuser[25928]: pam_unix(runuser:session): session opened for user jenkins by (uid=0)
Feb 23 10:23:32 dhcppc5 jenkins[25923]: Starting Jenkins [  OK ]
Feb 23 10:23:32 dhcppc5 systemd[1]: Started LSB: Jenkins Automation Server.
Check the ports and service
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[root@dhcppc5 ~]# netstat -tnlp

Open localhost.localdomain:8080 in your browser, it will ask to unlock the jenkins
For unlock jenkins use password
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[root@dhcppc5 ~]# cat /var/lib/jenkins/secrets/initialAdminPassword
ac5f882f7b204564aebd53a5972dbe3e
Then click on install suggested plugins

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