wc统计数量

-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 maximum display width

-w, --words
print the word counts