Shell's enterprise practical work case

Case one:

Monitoring Web Site Directory ( /var/html/www ) If all files are tampered with (the contents of the file have been changed), if there is a file name (e-mail) to print the changes, the scheduled task every 3 minutes to execute once

Monitoring script content:

[[email protected] scripts]# cat web-file.sh#!/bin/bash################################### ############################ file name: web-file.sh# version: v1.0# author:  da ya# organization: [email protected]# created time : 2018#  description:############################################################# #Email = ' [email protected] ' Find_file= ' find /tmp/ -type f ' dir= '/opt/web_file.log ' old_file= (' cat  $Dir |sed -r  ' s#[a-z,0-9]+   (. *) #\1#g ' |paste -s ') new_file= (' $Find _file|paste -s ') function check_ MD5 () {  if [ ! -f  "$Dir"  ];then     md5sum $ find_file >> $Dir   else     md5sum -c  "$Dir"  >/ Opt/check.log 2>&1     if [ $? -ne 0 ];then       mail -s  ' html modify '   $Email  </opt/check.log      fi  fi}function check_file () {  if [  "${#Old_file [*]}"  !=  "$ {#New_file [*]} "  ];then     echo " $New _file "|mail -s " Html  modify "  $Email   fi}function main () {  check_md5  check_file}main

Case TWO:

Writing service management scripts for rsync

Script content:

#!/bin/bash############################################################### file name:  web-file.sh# version: v1.0# author: da ya# organization: [email  protected]# created time : 2018# description:######################################## ######################. /etc/init.d/functions if [ ! -f /etc/rsyncd.conf ]; then  action  ' rsyncd.conf not exists '  /bin/false  exitfistart_cmd= ' Rsync --daemon ' stop_cmd= ' pkill rsync ' port_cmd= ' ss -tunlp|grep 873|wc -l ' START ()   {    if [  "$port _cmd"  -eq 2 ];then       action  ' rsync service is already exists '  /bin/true       exit    else       $start _cmd       action  'Rsync started '  /bin/true    fi}stop ()  {     $stop _cmd     action  ' rsync is stoped '  /bin/true}restart ()  {      $stop _cmd    action  ' rsync is stoped '  /bin/true     sleep 1     $start _cmd    action  ' rsync  is started '  /bin/true}case $1 instart)     START     ;; Stop)     STOP    ;; Restart)     RESTART    ;; Esac

Case THREE:

Monitoring memcache If the service is normal, impersonate the user ( Web client) detection.

Use NC commands plus set/get to simulate detection, and monitor response times and hit ratios.

Script content:

#!/bin/bash############################################################### file name:  memcache.sh# version: v1.0# author: da ya# organization: [email  protected]# created time : 2018# description:######################################## ######################. /etc/init.d/functionsdate_cmd= ' date +%f-%s ' port_cmd= ' nmap 172.16.1.21  -p 11211|awk  ' nr==6{print $2} ' set_cmd= ' printf  ' set key009 0 10  10\r\njiang12345\r\n "|nc 172.16.1.21 11211 ' get_cmd= ' printf " get key009 \r\n "|nc  172.16.1.21 11211|tr -d  ' \ R ' |awk  ' nr==2{print $1} ' restart_cmd= ' systemctl  Restart memcached.service ' if [  "$port _cmd"  !=  "CLOESD"  ];then       if [  "$get _cmd"  !=  "jiang12345"  ];then           action  ' Memcache get key is successfull '  /bin/true       fi   else       $restart _CMDFI

Case FOUR:

Write Nginx service Management scripts and monitor Web services for normal

Manage Service Scripts:

#!/bin/bash############################################################### file name: nginx.sh#  Version: V1.0# Author: da ya# Organization: [email protected]#  created time : 2018# description:######################################################### #####. /etc/init.d/functionsstart_cmd= '/application/nginx/sbin/nginx ' stop_cmd= ' Pkill nginx ' Restart_ Cmd= '/application/nginx/sbin/nginx -s reload ' if [ $# -ne 1 ];then     echo  "Please input $0 start|stop|restart"      Exitficase $1 in 1|start| START)     $start _cmd   action  ' nginx started '  /bin/true;; stop| STOP)     $stop _cmd   action  ' nginx stoped '  /bin/true;; Restart| RESTART)     $restart _cmd   action  ' nginx restarted '  /bin/true;; Esac

Monitoring Web Service scripts:

#!/bin/bash############################################################### file name:  monitor.sh# version: v1.0# author: da ya# organization: [email  protected]# created time : 2018# description:######################################## ##################### #start_cmd = '/application/nginx/sbin/nginx ' stop_cmd= ' Pkill nginx ' port_cmd= ' ss - Tunlp|grep 80|wc -l ' curl_cmd= ' curl -s -i 10.0.0.31 -w  "%{http_code}\n"  -o /dev/null ' if [  "$port _cmd"  -ne 1 ];then     $stop _ cmd    sleep 2     $start _cmd       if [  "$curl _cmd"  -ne 200 ];then        echo   "$curl _cmd" |mail -s  "web service failed"  [email protected]       fifi

Case FOUR:

Implement the MySQL database for sub-library backup

Script content:

#!/bin/bash############################################################### file name:  monitor.sh# version: v1.0# author: da ya# organization: [email  protected]# created time : 2018# description:######################################## ##################### #start_cmd = '/application/nginx/sbin/nginx ' stop_cmd= ' Pkill nginx ' port_cmd= ' ss - Tunlp|grep 80|wc -l ' curl_cmd= ' curl -s -i 10.0.0.31 -w  "%{http_code}\n"  -o /dev/null ' if [  "$port _cmd"  -ne 1 ];then     $stop _ cmd    sleep 2     $start _cmd       if [  "$curl _cmd"  -ne 200 ];then        echo   "$curl _cmd" |mail -s  "web service failed"  [email protected]       fifi

Case FIVE:

Use the For loop to print words with less than 6 alphabetic characters in the following string

I am Oldboy Teacher Welcome to Oldboy training class.

Script content:

#!/bin/bash for I on I am oldboy teacher Welcome to Oldboy Training class do if ["${#i}"-GT 6];then echo $i: ${ #i} else continue Fidone

Case SIX:

Batch create multiple accounts and generate random passwords, create a successful request account name and corresponding password to record to the file

Script content:

Case Seven:

[LVS Master node] manual development Ipvsadm Management LVS script Ip_vs

Implementation:/etc/init.d/lvs {Start|stop|restart}

Script content:

#!/bin/bash############################################################### file name: lvs.sh#  Version: V1.0# Author: da ya# Organization: [email protected]#  created time : 2018-03-24 00:47:17# description:##################################### #########################. /etc/init.d/functionsip_cmd= ' ip addr show eth0|grep  10.0.0.13|wc -l ' START ()  {   if [  "$ip _cmd"  -eq 0 ];then       ip addr add 10.0.0.13/24 dev eth0       ipvsadm -c      ipvsadm --set 30 5  60      ipvsadm -a -t 10.0.0.13:80 -s wrr -p  20      ipvsadm -a -t 10.0.0.13:80 -r  10.0.0.17:80 -g -w 1      ipvsadm -a -t 10.0.0.13:80 -r 10.0.0.18:80 -g  -w 1      action  ' lvs is started '  /bin/true    else      action  ' lvs is already exists '  / Bin/true   fi}stop ()  {      ipvsadm -C       ip addr del 10.0.0.13/24 dev eth0       action  ' lvs is stoped '  /bin/true}restart ()  {       ipvsadm -C      ip addr del 10.0.0.13/24  dev eth0      action  ' lvs is stoped '  /bin/true       ip addr add 10.0.0.13/24 dev eth0       ipvsadm --set&nbSp;30 5 60      ipvsadm -a -t 10.0.0.13:80 -s  wrr -p 20      ipvsadm -a -t 10.0.0.13:80 -r  10.0.0.17:80 -g -w 1      ipvsadm -a -t  10.0.0.13:80 -r 10.0.0.18:80 -g -w 1      action  ' Lvs is restarted '  /bintrue} case $1 in start)    START    ;;  stop)    STOP   ;;  restart)    RESTART   ;;  *)    echo  ' usage: input { start|stop|restart } '     ;; Esac

Shell's enterprise actual work case