在 AWS 和 Ansible 1.9 上使用 Ubuntu 14.04 并收到以下权限错误：
$ whoami
>> ubuntu
$ mkdir -p $HOME/.ansible/tmp/testfolder
>> mkdir: cannot create directory ‘/home/ubuntu/.ansible/tmp/testfolder’: Permission denied
$
$ # this works!!
$ sudo mkdir -p $HOME/.ansible/tmp/testfolder
$ # this also works!! (maybe ubuntu doesn't have sudo privileges...)
$ sudo rm -rf $HOME/.ansible/tmp/testfolder
$
$ # ???
$ sudo adduser ubuntu sudo
>> The user `ubuntu' is already a member of `sudo'.
如果ubuntu属于该sudo组，为什么我不能创建该目录而sudo可以？我怎么能真正给予ubuntu特权sudo …