find /V "" /C test.txt
echo. | find /v /c "&#@"
fsutil fsinfo drives|find /v ""
for /l %i in ( 1,1,255) do (ping -n 1 192.168.100.%i | findstr /c:"TTL=" && echo 192.168.100.%i)
find /V "" /C test.txt
find /V "" /C *.txt
findstr /R /N "^" recent.txt | find /C ":"
统计文件行数：
type TextFileName | find /v /c "&#@"
统计所有文件的总行数：
type *.* | find /v /c ""统计文件数：
dir /b /a-d | find /v /c "&#@"
统计文件和目录总数：
dir /b | find /v /c "&#@"