Shell exercises (1)

(1) Please follow the date format (XXXX-XX-XX) to generate a daily file, such as the file generated today is 2017-07-05.log, and the use of the disk to write to this file, (do not consider Cron, just write the script can be)!

#! /bin/bashd= ' Date +%f ' logfile= $d. logdf-h > $logfile

(2) Statistics Log

There is log 1.log, the content is as follows: Log fragment:

112.111.12.248 - [25/sep/2013:16:08:31 +0800] formula-x.haotui.com  "/seccode.php?update=0.5593110133088248"  200 "http://formula-x.haotui.com/ registerbbs.php " " mozilla/4.0  (compatible; msie 6.0; windows nt 5.1;  SV1;) "61.147.76.51 - [25/sep/2013:16:08:31 +0800]xyzdiy.5d6d.com "/attachment.php?aid=4554 &k=9ce51e2c376bc861603c7689d97c04a1&t=1334564048&fid=9&sid= Zgohwyolzq2qpw233zirsjiueu22xqe8f49jy9moursoe71 " 301" http://xyzdiy.***thread-1435-1-23.html " " mozilla/4.0  (COMPATIBLE; MSIE 6.0; WINDOWS NT 5.1; SV1; .NET CLR  1.1.4322; .net clr 2.0.50727) "

Requirement: What is the number of visits per IP?

# awk ' {print '} ' 1.log |sort-n|uniq-c

(3) Statistical Memory usage

Write a script that calculates the amount of memory that is consumed by all processes in the Linux system. (hint, use PS or TOP command)

#! /bin/bashsum=0for mem in ' ps aux |awk ' {print $6} ' |grep-v ' RSS ' does sum=$[$sum + $mem]doneecho "The total memory is $SU M "" K "

You can also use the awk command to calculate:

#ps aux | Grep-v ' RSS TTY ' |awk ' {(sum=sum+$6)}; End{print sum} '

(4) Design Monitoring Scripts

Monitor the surviving state of a remote machine (assuming IP 123.23.11.21) and send a message to yourself when you find a downtime. Tips:

1. You can use the ping command PING-C10 123.23.11.21

2. e-mail script can refer to https://coding.net/u/aminglinux/p/aminglinux-book/git/blob/master/D22Z/mail.py

3. Scripts can be turned into a dead loop, detected every 30s

#!/bin/baship=123.23.11.21[email protected]while 1do         ping -c10  $ip  >/dev/null 2>/dev/null         if [ $? !=  "0"  ]         then                python /usr/local/sbin/mail.py  $ma   $IP  down   $ip  is down, Plese check. "                 #假设mail. Py has been written and set up         fi        sleep  30done 

(5) Batch change file name

Find all files with the suffix. txt in the/123 directory

1. Bulk Modify. txt to. txt.bak

2. Package all. bak files into 123.tar.gz

3. The name of the batch restore file, that is, to remove the added. Bak again

#!/bin/bash# #查找txt文件find/123-type f-name "*.txt" >/tmp/txt.list# #批量修改文件名for F in ' cat/tmp/txt.list ' do MV $f $f. bakdone# #创建一个目录, in order to avoid the directory already exists, so add a complex suffix name d= ' date +%y%m%d%h%m%s ' mkdir/tmp/123_$d# #把. bak file to/tmp/123_$dfor F in ' CAT/    Tmp/txt.list ' do CP $f. bak/tmp/123_$ddone# #打包压缩cd/tmp/tar czf 123.tar.gz 123_$d/# #还原for F in ' cat/tmp/txt.list ' do MV $f. Bak $fdone

This article is from "a Man & A computer" blog, please be sure to keep this source http://juispan.blog.51cto.com/943137/1951336

Shell exercises (1)