padmin是一个专用的超级用户，可用利用该身份对VIO服务器各方面进行设置。
A specialized superuser, padmin, is used for most aspects of setting up VIO servers.
为了解决这个问题你必须给超级用户设置密码。
In order for this to work you have to give the root user a password.
允许管理员指定超级用户组，其成员可以解密已授权内容。还允许管理员重新设置私钥密码。
Allows administrator to specify the super user group whose members can decrypt licensed content. Also allows administrator to reset the private key password.
如果文件设置了‘a’属性，数据只能采用追加模式，仅仅超级用户或者拥有CAP _ LINUX _ IMMUTABLE能力的进程可以设置和删除该属性。
A file with the 'a' attribute set can only be open in append mode for writing. Only the superuser or a process possessing the CAP_LINUX_IMMUTABLE capability can set or clear this attribute.
超级用户是不能被设置密码的，原因是显而易见的。
Understand the root user was not given a password in Ubuntu for a reason…simplicity.
超级用户是不能被设置密码的，原因是显而易见的。
Understand the root user was not given a password in Ubuntu for a reason…simplicity.
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