Shell Exercises (iii)

Exercise 1:Batch Change file name

Requirements:

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

2. Bulk Modify. txt to. txt.bak

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

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

Reference Answer:

#!/bin/bash# date:2018 February 7 cd/root/123find. -type f-name "*.txt" >/tmp/txt.listfor f in ' cat/tmp/txt.list ' do mv $f $f. bakdoned= ' date + '%y%m%d%h%m%s ' TAR-ZCF $d. tar.gz *.bakfor F in ' cat/tmp/txt.list ' do mv $f. Bak $fdone

Of course you can also copy the TXT file, and then package the compression. But you have to delete it manually.

#!/bin/bash# date:2018 February 7 cd/root/123for txt in ' ls |grep-e '. txt$ "Do # echo" $txt "CP" $txt "/tmp/123/2>/dev/ Nulldonecd/tmp/123/find. -name "*.txt" |xargs-i mv {} {}.bakd= ' date + "%y%m%d%h%m%s" ' tar-zcf $d. tar.gz *.bak

Exercise 2: monitoring 80 ports

Requirements: write a script to determine whether the 80 port of the machine (if the service is httpd) is open, if the open does not do anything, if the discovery port does not exist, then restart the httpd service, the concurrent mail notify yourself. Once the script is written, it can be executed every minute, or it can write a dead loop script, 30s detection once

Reference Answer:

#!/bin/bash# date:2018 February 7 email= "[email protected]" while :d o   result= ' netstat  -lntp| grep  ":80 " |grep listen| wc -l '    if [ $ result -eq  "1"  ];then        continue    else        python /usr/local/sbin/mail.py  "$email"   " Check_80 " " The 80 port is down. "         /usr/local/apache2.4/bin/apachectl restart >/dev/ Null 2>/dev/null        n= ' Ps aux|grep httpd|grep  -cv grep '         if [  $n  -eq 0 ]; then           /usr/local/apache2.4/bin/apachectl  start 2>/tmp/apache_start.err         fi        if [ -s /tmp/apache_start.err  ];then           python /usr/local/sbin/ mail.py  "$email"   "Apache_start_error"   "' Cat /tmp/apache_start.err '"          fi   fi   sleep 30done

Mail Script mail.py:http://blog.51cto.com/11924224/2069732

Shell Exercises (iii)