账户的电子邮件地址和用户名以后都不能再次使用。

Email addresses and user IDs cannot be reused in the future.

youdao

全局文件email_lookup包含所有用户名和电子邮件账户，可以把它传输到所有系统上。

This global file email_lookup containing all the user names and E-mail accounts could then be pushed out to all the boxes.

youdao

它从前面生成的 passfile 文件读取用户名和密码，然后通过检查 /etc/passwd 确认这是有效的账户。

It reads the user and password from the file passfile, (generated earlier in this demonstration) it then checks this is a valid account by checking /etc/passwd.

youdao