关于shell:这28个值得收藏的shell脚本能让你每天摸鱼近7个小时

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前言：

在日常工作中，凡是你要跟服务器打交道，肯定离不开的神器便是 shell 脚本，shell 脚本能够极大的进步工程师的工作效率，防止一些认为因素导致的手误。那么明天圈圈就给大家分享 28 个 shell 脚本，心愿对大家有帮忙，脚本比拟多比拟长，一时间记不住能够先珍藏，用到的时候及时拿进去比对一下即可！

1. 轮询检测 Apache 状态并启用钉钉报警 

#!/bin/bash

shell_user="root"
shell_domain="apache"

shell_list="/root/ip_list"
shell_row=`cat $shell_list |wc -l`


function trans_text(){
text=$1

curl 'https://oapi.dingtalk.com/robot/send?access_token=b4fcf5862088a1bc7f2bf66a' -H'Content-Type: application/json' -d'{#指定钉钉机器人 hook 地址"msgtype":"text","text": {"content":"'"$text"'"}, 
}'
}



function apache_check_80(){
    ip=$1
    URL="http://$ip/index.html"
    HTTP_CODE=`curl -o /dev/null -s -w "%{http_code}" "${URL}"`

    if [$HTTP_CODE != 200]
        then
            trans_text "
            =================================================================
                                \n $ip Apache 服务器状态异样，网页返回码: '"$HTTP_CODE"' 请及时处理 ! \n
                                ================================================================= \n"
    fi
}

while true
do

shell_list="/root/ip_list"
shell_row=`cat $shell_list |wc -l`
    for temp in `seq 1 $shell_row`
    do
            Ip_Addr=`cat $shell_list |head -n $temp |tail -n 1`
        apache_check_80 $Ip_Addr
    done

    sleep 10
done

2. 一台监控主机，一台被监控主机。被监控主机分区使用率大于 80%，就发告警邮件。放到 crontab 外面，每 10 分钟执行一次 

#！/bin/bash

FSMAX="80"     
remote_user='root'  
remote_ip=(IP 地址列表)  
ip_num='0'      

while ["$ip_num" -le "$(expr ${#remote_ip[@]} -l)"]  
do  
read_num='1'           
        ssh "$remote_user"@"${remote_ip[$ip_num]}"  df -h > /tmp/diskcheck_tmp
        grep '^/dev/*'  /tmp/diskcheck_tmp | awk '{print $5}'|sed 's/\%//g'  > /tmp/diskcheck_num_tmp

        while ["$read_num" -le $(wc -l < /tmp/diskcheck_num_tmp) ]  
        do
                size=$(sed -n "$read_num" 'p'  /tmp/diskcheck_num_tmp)
                if ["size" -gt "$FSMAX"]
                then                       
                        $(grep '^/dev/*'  /tmp/diskcheck_tmp |sed -n $read_num'p'  > /tmp/disk_check_mail)
                        $(echo ${remote_ip[$ip_num]}) >> /tmp/disk_check_mail)
                        $(mail  -s "diskcheck_alert"  admin  <  /tmp/disk_check_mail)
                fi                         

                read_num=$(expr  $read_num + 1)
        done               

        ip_num=$(expr  $ip_num + 1)
done

3. 监控主机的磁盘空间, 当应用空间超过 90%就通过发 mail 来发正告 

#!/bin/bash  
#monitor available disk space  
#提取本服务器的 IP 地址信息    
IP=`ifconfig eth0 | grep "inet addr" | cut -f 2 -d ":" | cut -f 1 -d " "`      
SPACE=` df -hP | awk '{print int($5)}'`  
if [$SPACE -ge 90]  
then  
  echo "$IP 服务器 磁盘空间 使用率曾经超过 90%，请及时处理。"|mail -s "$IP 服务器硬盘告警，公众号：Geek 平安 "   fty89@163.com  
fi

4. 主动 ftp 上传 

#! /bin/bash

ftp -n << END_FTP  
open 192.168.1.22  
user  test testing      // 用户名 test  明码：testing  
binary  
prompt  off    // 敞开提醒  
mput   files     // 上传 files 文件  
close  
bye  
END_FTP

5.mysqlbak.sh 备份数据库目录脚本 

#!/bin/bash

DAY=`date +%Y%m%d`
SIZE=`du -sh /var/lib/mysql`
echo "Date: $DAY" >> /tmp/dbinfo.txt
echo "Data Size: $SIZE" >> /tmp/dbinfo.txt
cd /opt/dbbak &> /dev/null || mkdir /opt/dbbak
tar zcf /opt/dbbak/mysqlbak-${DAY}.tar.gz /var/lib/mysql /tmp/dbinfo.txt &> /dev/null
rm -f /tmp/dbinfo.txt

crontab-e
55 23 */3 * * /opt/dbbak/dbbak.sh

6. 打印彩虹 

declare -a ary


for i in `seq 40 49`
do

    ary[$i]=" "
    echo -en "\e[$i;5m ${ary[@]}\e[;0m"
    
done


declare -a ary
for s in `seq 1 10000`
do
    for i in `seq 40 49`
    do
        ary[$i]=" "
        echo -en "\e[$i;5m ${ary[@]}\e[;0m"    
    done
done

7. 打印菱形 

#!/bin/bash

for ((i = 1; i < 12; i++))
do
    if [[$i -le 6]]
    then
        for ((j = $((12-i)); j > i; j--))
        do
            echo -n " "
        done

        for ((m = 1; m <= $((2*i-1)); m++))
        do
             echo -n "*"
        done
            echo ""
#*****************************************************************************
    elif [[$i -gt 6]]
    then
        n=$((12-i))
        for ((j = $((12-n)); j > n; j--))
        do
            echo -n " "
        done

        for ((m = 1; m <= $((2*n-1)); m++))
        do
                        echo -n "*"
        done
            echo ""
    fi

done

8.expect 实现远程登陆主动交互 

#!/usr/bin/expect -f

set ipaddress [lindex $argv 0]

set passwd [lindex $argv 1]

set timeout 30

spawn ssh-copy-id root@$ipaddress

expect {"yes/no" { send "yes\r";exp_continue}

"password:" {send "$passwd\r"}

}



#expect "*from*"

#send "mkdir -p ./tmp/testfile\r"

#send "exit\r"

#expect "#" #i# 命令运行完, 你要期待一个后果, 后果就是返回 shell 提示符了 (是# 或者 $)

9.http 心跳检测 

#!/bin/bash



function MyInstall
{
        if ! rpm -qa |grep -q "^$1"
        then

                yum install $1
                if [$? -eq 0]
                then
                        echo -e "$i install is ok\n"
                else
                        echo -e "$1 install no\n"
                fi
        else
                echo -e "yi an zhuang ! \n"
        fi
}


for ins in mysql php httpd
do
        MyInstall $ins
done

12.shell 实现插入排序 

#!/bin/bash


declare -a array


for i in `seq 1 10`
do
    array[$i]=$RANDOM

done

echo -e "Array_1:  ${array[@]}"



for ((x=1;x<=9;x++))
do
    for((y=1;y<=9;y++))
    do
        if [${array[$y]} -gt ${array[$y+1]} ]
        then
            temp=${array[$y]}
            array[$y]=${array[$y+1]}
            array[$y+1]=$temp
        fi

    done

done


echo -e "Array_2:  ${array[@]}"

13.bash 实现动静进度条 

#!/bin/bash
i=0
bar=''
index=0
arr=("|" "/" "-" "\\")

while [$i -le 100]
do
    let index=index%4
    printf "[%-100s][%d%%][\e[43;46;1m%c\e[0m]\r" "$bar" "$i" "${arr[$index]}"
    let i++
    let index++
    usleep 30000
    bar+='#'
    clear
done

printf "\n"

14. 依据文件内容创立账号 

#!/bin/bash


for Uname in `cat /root/useradd.txt |gawk '{print $1}'`
do

                id $Uname &> /dev/null
                if [$? -eq 0]
                then
                        echo -e "这个账号已存在! 起源：微信公众号【网络技术干货圈】"
                        continue
                fi
        for Upasswd in `cat /root/useradd.txt |gawk '{print $2}'`
        do
                useradd $Uname &> /dev/null
                echo "$Upasswd" |passwd --stdin $Uname &> /dev/null
                if [$? -eq 0]
                then
                        echo -e "账号创立胜利!"
                else
                        echo -e "创立失败!"
                fi

        done

done

15. 红色进度条 

#!/bin/bash


declare -a ary


for i in `seq 0 20`
do

    ary[$i]=" "
    echo -en "\e[41;5m ${ary[@]}\e[;0m"
    sleep 1
    
done

16. 监控服务器网卡流量 

#!/bin/bash
#network
#Mike.Xu
while : ; do
speedtime='date +%m"-"%d" "%k":"%M'
speedday='date +%m"-"%d'
speedrx_before='ifconfig eth0|sed -n"8"p|awk'{print $2}'|cut -c7-'
speedtx_before='ifconfig eth0|sed -n"8"p|awk'{print $6}'|cut -c7-'
sleep 2
speedrx_after='ifconfig eth0|sed -n"8"p|awk'{print $2}'|cut -c7-'
speedtx_after='ifconfig eth0|sed -n"8"p|awk'{print $6}'|cut -c7-'
speedrx_result=$[(speedrx_after-speedrx_before)/256]
speedtx_result=$[(speedtx_after-speedtx_before)/256]
echo"$speedday$speedtime Now_In_Speed:"$speedrx_result"kbps Now_OUt_Speed:"$speedtx_result"kbps"
sleep 2
done

17. 检测 CPU 残余百分比 

#!/bin/bash

#Inspect CPU

#Sun Jul 31 17:25:41 CST 2016

PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/wl/bin
export PATH

TERM=linux
export TERM

CpuResult=$(top -bn 1 | grep "Cpu" | awk '{print $5}' | sed 's/\..*$//g')

if [[$CpuResult < 20]];then
  echo "CPU WARNING : $CpuResult" > /service/script/.cpu_in.txt
  top -bn 1 >> /service/script./cpu_in.txt
  mail -s "Inspcet CPU" wl < /service/script/.cpu_in.txt
fi

18. 检测磁盘残余空间 

#!/bin/bash

#Insepct Harddisk , If the remaining space is more than 80%, the message is sent to the wl

#Tue Aug  2 09:45:56 CST 2016

PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/wl/bin

export PATH

for RemainingSpace in $(df -h | awk '{print $5}' | grep -v 'Use' | sed -e 's/[%]//g')
do
  if [[$RemainingSpace > 80]];then
    echo -e "$RemainingSpace"
    echo -e "$(df -h | grep $RemainingSpace)" > /service/script/.HarddiskWarning
    mail -s "disk Warning" wl < /service/script/.HarddiskWarning
  fi
done

19. bash- 实现检测 apache 状态并钉钉报警 

#!/bin/bash


function trans_text(){
    text=$1
curl 'https://oapi.dingtalk.com/robot/send?access_token=b4fcf5862088a1bc7f2bf66aea051869e62ff5879fa0e0fddb0db9b1494781c2' -H'Content-Type: application/json' -d'{"msgtype":"text","text": {"content":"'"$text"'"}, 
}'
}


function desk_check(){
    
    dftype=$1
    shell_row=`df |wc -l`

for i in `seq 2 $shell_row`
do

    temp=(`df -h |head -n $i |tail -n 1 |awk '{print $5"\t"$6}'`)
    disk="`echo ${temp[0]} |cut -d"%"-f 1`"
    name="${temp[1]}"
    hostname=`hostname`
    IP=`ifconfig |grep -v "127.0.0.1" |grep "inet addr:" |sed 's/^.*inet addr://g'|sed 's/ Bcas..*$//g'`
    #echo -e "$disk     $name"
    Dat=`date "+%F %T"`
    
    if [$disk -ge $dftype]
    then
        echo  "
                            ======================== \n
                    > 磁盘分区异样 < \n
               主机名: $hostname \n        
               IP 地址: $IP \n
                分区名: $name \n
               使用率: $disk %\n 
               产生工夫: $Dat \n
                          ========================= \n"
    fi
done
}

function apache_check(){
    url=$1
URL="http://$url/"
HTTP_CODE=`curl -o /dev/null -s -w "%{http_code}" "${URL}"`

if [$HTTP_CODE != 200]
    then
        echo  "
                           ======================== \n
                   >Apache 服务异样 <
                           主机名: $hostname \n         
                           IP 地址: $IP \n
                           返回代码: $HTTP_CODE \n
                           产生工夫: $Dat \n
                          ========================= \n"                        
fi
}

while true
do
    desk_check 10
    apache_check 127.0.0.1

    sleep 10
done

20. 内存检测 

#!/bin/bash

#Inspect Memory : If the memory is less than 500 , then send mail to wl

#Tue Aug  2 09:13:43 CST 2016


PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/wl/bin

export PATH


MEM=$(free -m | grep "Mem" | awk '{print $4}')

if [[MEM < 500]];then
  echo -e "Memory Warning : Memory free $MEM" > /service/script/.MemoryWarning
  mail -s "Memory Warning" wl < /service/script/.MemoryWarning
fi

21. 残余 inode 检测 

#!/bin/bash

#Inspcet Inode : If the free INODE is less than 200, the message is sent to the wl

#Tue Aug  2 10:21:29 CST 2016

PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/wl/bin

export PATH

for FreeInode in $(df -i | grep -v "Filesystem" | awk '{print $4}')
do
  if [[$FreeInode < 200]];then
    echo -e "$(df -i | grep"$FreeInode")" > /service/script/.FreeInode
    mail -s "FreeInode Warning" wl < /service/script/.FreeInode
  fi
done

22. 判断哪些用户登陆了零碎 

#!/bin/bash

declare -i count=0

while true;do

        if who |grep -q -E "^wang"
        then
                echo -e "用户 wang 登陆了零碎 \n 这是第 $count 次! 威信公众浩：wljsghq"
                break
        else
                let count++
        fi

        sleep 3
done
~    



示例：找出 UID 为偶数的所有用户，显示其用户名和 ID 号；#!/bin/bash
while read line; do
    userid=$(echo $line | cut -d: -f3)
    if [$[$userid%2] -eq 0 ]; then
echo $line | cut -d: -f1,3
    fi
done < /etc/passwd

23. 批量创立账号 

#!/bin/bash

sum=1

while [$sum -le 30]
do
    if [$sum -le 9]
    then
        user="user_0$sum"
    else
        user="user_$sum"
    fi

        useradd $user
        echo "123456" |passwd --stdin $user
        chage -d 0 $user
        let sum=sum+1

done

24. 批量扫面存活 

#!/bin/bash
#By:lyshark

#nmap 192.168.22.0/24>ip


MAC=`cat ip |awk '$1 =="MAC"&& $NF =="(VMware)"{print $3}'`

for i in `seq 1 20`

do

temp=`echo ${MAC[@]} |awk '{print $i}'`

IP=`cat /ip |grep  -B5 $temp |grep "Nmap scan"|awk '{print $5}'`


    echo $IP |awk '{print $1}'
done

25. 正则匹配 IP

^[0-9]{0,2}|^1[0-9]{0,2}|^2[0-5]{0,2}

 egrep "(^[0-9]{1,2}|^1[0-9]{0,2}|^2[0-5]{0,2})\.([0-9]{1,2}|1[0-9]{0,2}|2[0-5]{0,2})\.([0-9]{1,2}|1[0-9]{0,2}|2[0-5]{0,2})\.([0-9]{1,2}|1[0-9]{0,2}|2[0-5]{0,2})$"





([0-9]{1,2}|1[0-9]{0,2}|2[0-5]{0,2})
([0-9]{1,2}|1[0-9]{0,2}|2[0-5]{0,2})
([0-9]{1,2}|1[0-9]{0,2}|2[0-5]{0,2})
([0-9]{1,2}|1[0-9]{0,2}|2[0-5]{0,2})



egrep "((25[0-5]|2[0-4][0-9]|((1[0-9]{2})|([1-9]?[0-9])))\.){3}(25[0-5]|2[0-4][0-9]|((1[0-9]{2})|([1-9]?[0-9])))"



ls |egrep "((25[0-5]|2[0-4][0-9]|((1[0-9]{2})|([1-9]?[0-9])))\.){3}(25[0-5]|2[0-4][0-9]|((1[0-9]{2})|([1-9]?[0-9])$))"

26. 正则匹配邮箱 

egrep "^[0-9a-zA-Z][0-9a-zA-Z_]{1,16}[0-9a-zA-Z]\@[0-9a-zA-Z-]*([0-9a-zA-Z])?\.(com|com.cn|net|org|cn)$" rui


ls |egrep "^(([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-4])$"

27. 实现布片成果 

#!/bin/bash


function ary_go
{
    $1 $2
    
    for ((i=0;i<=$1;i++))
    do
        for ((s=0;s<=$2;s++))
        do
            if [$[$i%2] == 0 ]
            then
        
                if [$[$s%2] == 0 ]
                then
                    echo -en " "
                else
                    echo -en "\e[;44m  \e[;m"
                fi
            else
                                                if [$[$s%2] == 0 ]
                                then
                                        echo -en "\e[;42m  \e[;m"
                                else
                                        echo -en " "
                                fi



            fi

        done
            echo 

    done

}


ary_go 25 50

28. 剔除白名单以外的用户 

#!/bin/bash
w | awk 'NR>=3 {printf $1"\t"$2"\t"$3"\n"}' > /tmp/who.txt
for i in $(awk '{printf $1}' /tmp/bai.txt)
do
        k=$(egrep -v "$i" /tmp/who.txt | awk '{printf $2}"\n"'| awk'{printf $2 "\n"}')
        for j in $k
        do
                pkill -9 -t "$j"
        done
done

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shell
发表至： shell
2021-07-21
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