Once a plugin file has been uploaded, the Jenkins master must be manually restarted in order for the changes to take effect. Assuming a  .hpi  file has been explicitly downloaded by a systems administrator, the administrator can manually place the  .hpi  file in a specific location on the file system. Copy the downloaded  .hpi`  file into the  JENKINS_HOME/plugins  directory on the Jenkins master (for example, on Debian systems  JENKINS_HOME  is generally  /var/lib/jenkins ). The master will need to be restarted before the plugin is loaded and made available in the Jenkins environment. The names of the plugin directories in the Update Site [27: updates.jenkins.io] are not always the same as the plugin’s display name. Searching plugins.jenkins.io for the desired plugin will provide the appropriate link to the  .hpi  files. On the master NOTE 162