If either of these commands fail, contact your system or network administrator to ensure that the machine is correctly configured.
如果其中任一个命令失败，请联系系统或网络管理员，以确保该计算机已正确地配置。
Learn how a system administrator can better spend their time in other ways than by typing endless commands from the command line.
了解系统管理员如何更好地利用他们的时间，而不是把时间浪费在从命令行键入无休止的命令。
Running such commands is part of system administration — and as a single user of a UNIX system, you are your own system administrator.
运行上述命令是系统管理员的部分工作，作为一个UNIX系统的单个用户，你就是你自己的系统管理员。
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