摘要：
vagrant@homestead：~$systemctldisablelasticsearch.service将lasticsearch-service的状态与SysVservicescriptwith/lib/systemd/systemd sysv install同步。执行：pam_authenticatefile：
vagrant@homestead:~$ systemctl disable elasticsearch.service Synchronizing state of elasticsearch.service with SysV service script with /lib/systemd/systemd-sysv-install. Executing: /lib/systemd/systemd-sysv-install disable elasticsearch ==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon === Authentication is required to reload the systemd state. Authenticating as: vagrant,,, (vagrant) Password: Failed to reload daemon: Method call timed out polkit-agent-helper-1: pam_authenticate failed: Authentication failure update-rc.d: error: unable to read /etc/init.d/elasticsearch
无论是启动还是关闭都要密码是啥意思呢，而且还不让输入内容
解决方法：
sudo 执行