linux /etc/passwd 输出结果的含义

摘自http://www.computerhope.com/unix/ucut.htm

You can specify any character as the delimiter, however. For instance, the file /etc/passwd contains information about each user on the system, one user per line, and each information field is delimited by a colon (":"). For example, the line of /etc/passwd for the root user may look like this:

root:x:0:0:root:/root:/bin/bash

These fields contain the following information, in the following order, separated by a colon character:

Username

Password (shown as x if encrypted)

User ID number (UID)

Group ID number (GID)

Comment field (used by the finger command)

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