195-shell.md

195.

难度: Easy

刷题内容

原题连接

• https://leetcode.com/problems/tenth-line/

内容描述

Given a text file file.txt, print just the 10th line of the file.

Example:

Assume that file.txt has the following content:

Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
Your script should output the tenth line, which is:

Line 10
Note:
1. If the file contains less than 10 lines, what should you output?
2. There's at least three different solutions. Try to explore all possibilities.

解题方案

思路 1

beats 25.71%

tail -n +10 file.txt | head -n 1

思路 2

awk 'NR==10' file.txt

awk 'NR==10{print $0}' file.txt

awk 'NR==10' file.txt | more

思路 3

beats 97.71%

sed -n 10p file.txt

总结：

1. 多练吧，几天不用 shell基础