Tenth Line

题目大意：给一个多行的文件，让你写一段shell脚本把文件的第10行输出来。

方法一：

# Read from the file file.txt and output the tenth line to stdout.count=0while read line && [ $count -le 10 ]do    count=$[$count+1]    if [ $count -eq 10 ]    then        echo $line        exit    fidone < file.txt

方法二：

# Read from the file file.txt and output the tenth line to stdout.sed -n '10p' file.txt

方法三：

# Read from the file file.txt and output the tenth line to stdout.awk '{if(NR==10) print $0}' file.txt

方法四：（方法三的简化）

# Read from the file file.txt and output the tenth line to stdout.awk 'NR==10' file.txt