curl -O https://downloads-packages.s3.amazonaws.com/centos-6.6/gitlab-7.6.1_omnibus.5.3.0.ci.1-1.el6.x86_64.rpm yum install openssh-server postfix cronie service postfix start && chkconfig postfix on rpm -i gitlab-7.6.1_omnibus.5.3.0.ci.1-1.el6.x86_64.rpm