there are many repo for ambari and 2.7.5 is not paid prefer to download it directly from https://cwiki.apache.org/confluence/display/AMBARI/Installation+Guide+for+Ambari+2.7.5   or install 2.7.3 ambari repo for hdp 3.1.4 for ubuntu : http://www.olric.org/2019/09/install-single-node-hortonworks-data.html or https://docs.cloudera.com/HDPDocuments/Ambari-2.7.3.0/bk_ambari-installation/content/ch04s01s06.html for centos install this repo https://docs.cloudera.com/HDPDocuments/Ambari-2.7.3.0/bk_ambari-installation/content/download_the_ambari_repo_lnx7.html ... View more