【shell脚本大全-01】统计一个文本文件内有多少行

line=0
while read val
do
    line = $((line + 1))
done < test.txt
echo $line

tail -n 5 info.log

for i in {0..500..7}
do
 echo ${i}
done

let i=0
while read line; do
   if [ $i -eq 4 ];then
       echo $line
       return 0
   fi
   i=$[i+1]
done < test.txt

#!/bin/bash
i=1
while read line;
do
    if [ -z $line ];
    then
        echo $i
    fi
    i=$[i+1]
done < nowcoder.txt