Linux wc命令及统计文件夹下文件及文件夹个数

1. 统计文件夹下文件及文件夹个数

统计当前目录下文件的个数（不包括目录）
$ ls -l | grep "^-" | wc -l
//普通文件以-开头

统计当前目录下文件的个数（包括子目录）
$ ls -lR| grep "^-" | wc -l

查看某目录下文件夹(目录)的个数（包括子目录）
$ ls -lR | grep "^d" | wc -l
//普通文件夹以d开头

2. wc 命令：

wc （Word Count）命令的功能为统计指定文件中的字节数、字数、行数，并将统计结果显示输出

2.1 参数：

-c	统计字节数
-l	统计行数
-m	统计字符数。这个参数不能与 -c 参数一起使用。
-w	统计字数。一个字被定义为空白、跳格或换行字符分隔的字符串。
-L	打印最长行的长度
--help	显示帮助信息
--version	显示版本信息

2.2 例子：

[root@localhost test]# wc main.c 
  66  149 1433 main.c
//行数 单词 字节
[root@localhost test]#

[root@localhost memory-poll]# wc -c main.c 
1433 main.c
[root@localhost memory-poll]# wc -l main.c 
66 main.c
[root@localhost memory-poll]# wc -m main.c 
1433 main.c
[root@localhost memory-poll]# wc -w main.c 
149 main.c
[root@localhost memory-poll]# wc -version
wc: invalid option -- 'v'
Try 'wc --help' for more information.
[root@localhost memory-poll]# wc --version
wc (GNU coreutils) 8.22
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Paul Rubin and David MacKenzie.
[root@localhost memory-poll]# wc --help
Usage: wc [OPTION]... [FILE]...
or:  wc [OPTION]... --files0-from=F
Print newline, word, and byte counts for each FILE, and a total line if
more than one FILE is specified.  With no FILE, or when FILE is -,
read standard input.  A word is a non-zero-length sequence of characters
delimited by white space.
The options below may be used to select which counts are printed, always in
the following order: newline, word, character, byte, maximum line length.
-c, --bytes            print the byte counts
-m, --chars            print the character counts
-l, --lines            print the newline counts
	--files0-from=F    read input from the files specified by
						NUL-terminated names in file F;
						If F is - then read names from standard input
-L, --max-line-length  print the length of the longest line
-w, --words            print the word counts
	--help     display this help and exit
	--version  output version information and exit

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
For complete documentation, run: info coreutils 'wc invocation'
[root@localhost memory-poll]# wc -L m
main.c         memory_pool.c  memory_pool.h  
[root@localhost memory-poll]# wc -L main.c 
74 main.c
[root@localhost memory-poll]#