CentOS沒法添加組和用戶

       今天安裝Puppet，當install完成後啓動puppetmaster時遇到以下錯誤：學習 啓動 puppetmaster：could not change to group "puppet" Could not change to user puppet: Invalid user: puppet        因而嘗試手動添加組和用戶，卻不能添加： #groupadd pupp

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