读取/etc/passwd文件计算输出用户数

以下是该shell脚本的源代码：

#!/bin/bash
# Shell Script that outputs the number of users with entries in the
# Unix or Linux /etc/passwd file
# -------------------------------------------------------------------------
# Copyright (c) 2005 nixCraft project <
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit  for more information.
# -------------------------------------------------------------------------
PASSWD=/etc/passwd
 
# easy method with wc
OUT=$(wc -l $PASSWD)
 
# More accurate method to find out
# If user account suspended using # character then second method
# is more accurate and recommend
OUT1=$(grep -Ev "^#" $PASSWD | wc -l)
 
echo "$OUT [$OUT1]"
# You can filter result with awk
echo $OUT | awk '{ print $1 }'