文件名称：reads directly from the password file
文件大小：2KB
文件格式：TXT
更新时间：2017-09-03 04:17:29
reads password file
This repeats the sorted user lister given earlier. There are two differences: The program reads directly from the password file, rather than standard input. If a file name is specified on the command line, the program reads that. Otherwise, it reads /etc/passwd.