Summery
ファイルの行数、単語数、バイト数を表示する。
結構高速なので、いちいちファイルを開かなくても要領が把握できて便利
※バイト数調査の場合、２バイト文字は、あまりうまくいかないらしい。
Construction
$wc [option] [file]
Option
-c : バイト数の表示
-l : 行数の表示
-L : 最長行のバイト数を表示
-w : 単語数の表示
Sample
# 行数、単語数、バイト数の表示
$ wc hoge.txt
# 行数だけを表示（※よく使う）
$ wc -l hoge.txt
$ cat hoge.txt | wc -l
Discription
The wc utility displays the number of lines, words, and bytes contained in each input
file, or standard input (if no file is specified) to the standard output. A line is
defined as a string of characters delimited by a <newline> character. Characters beyond
the final <newline> character will not be included in the line count.
A word is defined as a string of characters delimited by white space characters. White
space characters are the set of characters for which the iswspace(3) function returns
true. If more than one input file is specified, a line of cumulative counts for all the
files is displayed on a separate line after the output for the last file.
The following options are available:
-c The number of bytes in each input file is written to the standard output. This
will cancel out any prior usage of the -m option.
-l The number of lines in each input file is written to the standard output.
-m The number of characters in each input file is written to the standard output.
If the current locale does not support multibyte characters, this is equivalent
to the -c option. This will cancel out any prior usage of the -c option.
-w The number of words in each input file is written to the standard output.
When an option is specified, wc only reports the information requested by that option.
The order of output always takes the form of line, word, byte, and file name. The
default action is equivalent to specifying the -c, -l and -w options.
If no files are specified, the standard input is used and no file name is displayed.
The prompt will accept input until receiving EOF, or [^D] in most environments.
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