2017 the latest enterprise face Test shell (iii)

2017 the latest enterprise face Test shell (iii)

Exercise 1: Write a shell script, similar to log cutting, the system has a logrotate program, you can complete the archive. But now we're going to write ourselves a shell script to implement the archive.

Example: If the output log of the service is 1.log, I want to archive one every day, 1.log the next day to become 1.log.1, the third day 1.log.2, fourth day 1.log.3 until 1.log.5

The script reads as follows:

#!/bin/sh

function LogDir ()

{

[-F $] && Rm-f $

}

For I in $ (SEQ 5-1 2)

Do

q=$[$i-1]

Logdir/data/1.log. $i

if [-f/data/1.log. $q]

Then

Mv/data/1.log. $q/data/1.log. $i

Fi

Done

Logdir/data/1.log.1

Mv/data/1.log/data/1.log.1

Exercise 2: Print a line with only one number

Title, a text document with only one number of lines to print out.

The answers are as follows:

[email protected] ~]# cat 2017-8-31.txt

My name is WTF

I Love ZD

Qqqqqqqqqqqqqqqqq

Aaaaaaaaaaaaaaaaa

Rrrrrrrrrr1tttttttttttttt

Yyyyyyyyyy3333ssssssssssss

4444444444444444444444444

4SRDTYGFJ

5

333

The script is as follows:

#!/bin/bash

File=/root/2017-8-31.txt

line=$ (wc-l $file |awk ' {print $} ')

For I in $ (seq 1 $line)

Do

Q= ' Sed-n "$i" P $file |grep-o ' [0-9] ' |wc-l '

If [$q-eq 1];then

Sed-n "$i" p $file

Fi

Done

Script Run Result:

Rrrrrrrrrr1tttttttttttttt

4SRDTYGFJ

5

Description

(1) Grep-o where-o means "only-matching", meaning "match only", more information: http://blog.csdn.net/u013982161/article/details/52334940

(2) Extract number: Wc-l $file |awk ' {print $} '

The explanations are as follows:

[Email protected] ~]# wc-l 2017-8-31.txt

Ten 2017-8-31.txt

[[email protected] ~]# wc-l 2017-8-31.txt |awk ' {print $} '

10

This article is from the "Hand of the Paladin Control" blog, please make sure to keep this source http://wutengfei.blog.51cto.com/10942117/1961513

2017 the latest enterprise face Test shell (iii)