Linux Shell常用脚本整理

Shell脚本
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2023-02-08
Linux Shell 脚本编程基础
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一些常用的Shell脚本笔记，这是当年在兄弟连学习Linux运维是写过的一些案例，后期在工作中也遇到了一些问题需要使用shell来解决的，这里总结起来方便以后可以直接复用。

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 $ip Apache 服务器状态异常，网页返回码: '"$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

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里面，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

监控主机的磁盘空间,当使用空间超过90％就通过发mail来发警告

#!/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 使用率已经超过90%，请及时处理。"|mail -s "$IP 服务器硬盘告警"   fty89@163.com  
fi

实现FTP自动上传

#! /bin/bash
 
ftp -n << END_FTP  
open 192.168.1.22  
user  test testing      //用户名test  密码：testing  
binary  
prompt  off    //关闭提示  
mput   files     //上传files文件  
close  
bye  
END_FTP

针对 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

在终端中实现打印彩虹

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

在终端中实现打印菱形

#!/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

expect实现远程登陆自动交互

#!/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, 你要期待一个结果, 结果就是返回shell提示符了(是# 或者$)

http心跳检测

URL="http://192.168.22.191/index.html"
 
THHP_CODE=`curl -o /dev/null -s -w "%{http_code}" "${URL}"`
 
if [ $HTTP_CODE != 200 ]
then
    echo -e "apache code:"$HTTP_CODE""
fi

PV过量自动实现防火墙封IP

#!/bin/bash
 
log=/tmp/tmp.log
 
[ -f $log ] || touch $log
 
function add_iptales()
{
        while read line
        do
                ip=`echo $line |awk '{print $2}'`
                count=`echo $line |awk '{print $1}'`
                        if [ $count -gt 100 ] && [ `iptables -L -n |grep "$ip" |wc -l` -lt 1 ]
                                then
                                        iptables -I INPUT -s $ip -j DROP
                                        echo -e "$list isdropped">>/tmp/droplist.log
                        fi
 
        done<$log
}
 
function main()
{
        while true
        do
                netstat -an|grep "EST" |awk -F '[:]+' '{print $6}'|sort |uniq -c >$log
                add_iptales
                sleep 180
        done
}
 
main

shell实现自动安装

#!/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

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[@]}"

bash实现动态进度条

#!/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"

根据文件内容创建账号

#!/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!"
                        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 "账号创建成功!"
                else
                        echo -e "创建失败!"
                fi
 
        done
done

实现红色进度条

#!/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

监控服务器网卡流量

#!/bin/bash
 
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

检测CPU剩余百分比

#!/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

检测磁盘剩余空间

#!/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

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
                    >磁盘分区异常< \n
               主机名: $hostname \n        
               IP地址: $IP \n
                分区名: $name \n
               使用率: $disk %\n 
               发生时间: $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服务异常<
                           主机名: $hostname \n         
                           IP地址: $IP \n
                           返回代码: $HTTP_CODE \n
                           发生时间: $Dat \n
                          ========================= \n"                        
fi
}
 
while true
do
    desk_check 10
    apache_check 127.0.0.1
 
    sleep 10
done

bash实现内存检测

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

剩余inode检测

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

判断哪些用户登陆了系统

#!/bin/bash
 
declare -i count=0
 
while true;do
 
        if who |grep -q -E "^wang"
        then
                echo -e "用户wang 登陆了系统\n 这是第$count 次!"
                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

批量创建账号

#!/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

批量扫描主机存活

#!/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

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])$))"

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])$"

实现布片效果

#!/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

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

Shell实现的一个自动化管理工具

#!/bin/bash
 
shell_user="root"
shell_pass="1233"
shell_port="22"
shell_list="/root/ip_list"
shell_row=`cat $shell_list |wc -l`
 
comad[0]=$1
comad[1]=$2
comad[2]=$3
comad[3]=$4
comad[4]=$5
comad[5]=$6
comad[6]=$7
comad[7]=$8
comad[8]=$9
comad[9]=${10}
comad[10]=${11}
comad[11]=${12}
comad[12]=${13}
comad[13]=${14}
comad[14]=${15}
comad[15]=${16}
comad[16]=${17}
comad[17]=${18}
comad[18]=${19}
comad[19]=${20}
comad[20]=${21}
 
function shell_exp(){
 
date_start=`date +"%T"`
rm -fr ./shell_log
for temp in `seq 1 $shell_row`
do
        Ip_Addr=`cat $shell_list |head -n $temp |tail -n 1`
	
	ping -c 1 $Ip_Addr &>/dev/null
	if [ $? -eq 0 ]
	then
		echo -e "\e[34;1m====================================================>$Ip_Addr<=======================================================\e[;m\n"
        	ssh -p $shell_port $shell_user@$Ip_Addr ${comad[*]}
		if [ $? -eq 0 ]
		then
			echo -e "$Ip_Addr\t\t$shell_port\t\t${comad[*]} \t\t成功\n" >>./shell_log
		fi
	else
		echo -e "$Ip_Addr\t\t$shell_port\t\t${comad[*]} \t\t失败\n" >>./shell_log
		continue 
	fi
done
date_end=`date +"%T"`
	clear 
	echo -e "\e[34;1m===========================================================================================================================\e[;m"
	echo -e "\e[34;1m主机IP			端口		命令						状态	\e[;m\n"
	cat ./shell_log
	echo -e "\e[34;1m===========================================================================================================================\e[;m\n"
	echo -e "\e[34;1m 开始时间：$date_start \t\t\t 结束时间：$date_end  \t\t\t\t  \e[;m\n"
	echo -e "\e[34;1m 执行主机数：$shell_row \t\t\t 成功主机：`cat ./shell_log |grep "成功" |wc -l`  \t\t\t 失败主机：`cat ./shell_log |grep "失败" |wc -l`\t\t\t\e[;m\n"
	echo -e "\e[34;1m 失败主机记录 ↓\e[;m\n"
	cat ./shell_log |grep "失败"
	echo -e "\e[34;1m===========================================================================================================================\e[;m\n"
 
}
 
function shell_upload(){
 
date_start=`date +"%T"`
rm -fr ./shell_log
 
for temp in `seq 1 $shell_row`
do
 
        take_ip=`cat $shell_list |head -n $temp |tail -n 1`
        Ip_Addr="$take_ip"
	ping -c 1 $Ip_Addr &>/dev/null
	if [ $? -eq 0 ]
	then
		scp ${comad[1]} $shell_user@$Ip_Addr:${comad[2]} &>/dev/null
		if [ $? -eq 0 ]
		then
			echo -e "\e[34;1m$Ip_Addr\t\t 传输完成....\e[;m\n"
			echo -e "$Ip_Addr\t\t$shell_port\t\t${comad[1]}\t\t${comad[2]}\t\t\t\t成功\n" >>./shell_log
		fi
	else
			echo -e "\e[34;1m$Ip_Addr\t\t 传输失败....\e[;m\n"
			echo -e "$Ip_Addr\t\t$shell_port\t\t${comad[1]}\t\t${comad[2]}\t\t\t\t失败\n" >>./shell_log
			continue
	fi
 
done
 
	date_end=`date +"%T"`
	clear 
	echo -e "\e[34;1m===========================================================================================================================\e[;m"
	echo -e "\e[34;1m主机IP			端口		传输源			传输到			状态	\e[;m\n"
	cat ./shell_log
	echo -e "\e[34;1m===========================================================================================================================\e[;m\n"
	echo -e "\e[34;1m 开始时间：$date_start \t\t\t 结束时间：$date_end  \t\t\t\t  \e[;m\n"
	echo -e "\e[34;1m 执行主机数：$shell_row \t\t\t 成功主机：`cat ./shell_log |grep "成功" |wc -l`  \t\t\t 失败主机：`cat ./shell_log |grep "失败" |wc -l`\t\t\t\e[;m\n"
	echo -e "\e[34;1m 失败主机记录 ↓\e[;m\n"
	cat ./shell_log |grep "失败"
	echo -e "\e[34;1m===========================================================================================================================\e[;m\n"
}
 
 
function shell_meminfo(){
 
        echo -e "\e[34;1m===========================================================================================================================\e[;m"
        echo -e "\e[34;1m IP地址\t\t\t总量\t\t已使用\t\t剩余\t\t共享\t\t缓冲\t\t缓存\t\t\n \e[;m"
for temp in `seq 1 $shell_row`
do
        take_ip=`cat $shell_list |head -n $temp |tail -n 1`
        Ip_Addr="$take_ip"
        echo -ne "\e[34;1m $take_ip\t\t \e[;m"
#       sleep 0.5
        ping -c 1 $Ip_Addr &>/dev/null
        if [ $? -eq 0 ]
        then
                ssh $shell_user@$take_ip free -h |grep "Mem:" |awk '{print $2 "\t\t" $3 "\t\t" $4 "\t\t" $5 "\t\t" $6 "\t\t" $7}'
        else
                echo -e "0M\t\t0M\t\t0M\t\t0M\t\t0M\t\t0M"
        fi
done
        echo -e "\e[34;1m===========================================================================================================================\e[;m"
 
}
 
 
#==============================================批量分发SSH密钥函数体-开始=======================================================================
function shell_ssh_keygen(){
      /usr/bin/expect << EOF
set timeout 5
spawn ssh-keygen -t rsa
expect {
"*save the key*" {send "\n";exp_continue}
"Enter passphrase*" {send "\n";exp_continue}
"*passphrase again:" {send "\n"}
}
expect eof
EOF
}
 
function shell_push_sshkey(){
local ssh_user=$1
local ssh_host=$2
local ssh_pass=$3
/usr/bin/expect << EOF
set timeout 10
spawn ssh-copy-id $ssh_user@$ssh_host
expect {
"(yes/no)" {send "yes\n"; exp_continue}
"password:" {send "$ssh_pass\n"}
"id_rsa.pub" {puts "(^_^)\n";exit 2\n}
}
expect eof 
EOF
}
 
 
 
function shell_expect(){
 
for temp in `seq 1 $shell_row`
do
        Ip_Addr=`cat $shell_list |head -n $temp |tail -n 1`
        shell_push_sshkey $shell_user $Ip_Addr $shell_pass
done
}
#==============================================批量分发SSH密钥函数体-结束=======================================================================
 
 
function shell_add_ip(){
 
        [ -e $shell_list ] || touch $shell_list
        echo "${comad[1]}" >>$shell_list
        if [ $? -ne 0 ]
        then
                echo -e "\e[34;1m 添加IP:${comad[1]}失败 \e[;m\n\n"
		exit 1
	fi
}
 
function shell_show_ip(){
 
        [ -e $shell_list ] || touch $shell_list
	echo -e "\e[34;1m====================================================================\n\n\e[;m"
	echo -e "\e[34;1m`cat $shell_list` \n\n\e[;m"
	echo -e "\e[34;1m总计:`cat $shell_list |wc -l `\t\t\t 操作列表:$shell_list\n\n\e[;m"
	echo -e "\e[34;1m====================================================================\n\n\e[;m"
}
 
 
function shell_drop_ip(){
	
#sed -i '/echo "${comad[1]}"/d' $shell_list
#	for i in `seq 1 $shell_row`
#	do
#		Ip_Addr=`cat $shell_list |head -n $temp |tail -n 1`
#		if [ "$Ip_Addr" == "$del_ip" ]
#		then
#	donei
#	cat $shell_list |grep -v ${comad[1]}  >/root/ip_list.tmp
#	rm -fr /root/ip_list
#	mv /root/ip_list.tmp /root/ip_list
 
	rm -fr $shell_list
	touch $shell_list
 
}
 
 
function shell_init(){
 
	touch $shell_list
	yum install -y expect
	[ $? -eq 0 ]
	echo -e "\e[34;1m 初始化成功... \e[m"
	
}
 
function shell_help(){
 
        echo -e "\e[34;1m====================================================================\n"
 
#        echo -e "注:如需要多线程执行,请自行在for语句下加入{} 并写入　wait　即可支持多线程，加快传输速度\n\n"
 
#	echo -e "\t\t\t[使用时请自行在/root/目录下创建ip_list文件并写入你要控制的主机]\n\n"
 
        echo -e "\t-shell [任意命令]			批量远程执行命令\n"
	
	echo -e "\t-init					初始化\n"
 
        echo -e "\t-show					显示控制列表\n"
 
        echo -e "\t-add					添加一个被管理主机\n"
        
	echo -e "\t-del					删除一个被管理主机\n"
	
	echo -e "\t-drop					清空一个主机列表\n"
 
        echo -e "\t-keys					本地生成密钥对\n"
 
        echo -e "\t-scpkeys				批量分发密钥对\n"
 
        echo -e "\t-upload [本地文件]  [传输到]		批量传输文件\n"
 
        echo -e "\t-mem					批量统计主机内存使用\n"
 
        echo -e "====================================================================\n\n"
	echo -e " Powered by LyShark\n"
        echo -e "====================================================================\e[;m"
 
 
}
 
case ${comad[0]} in
 
	"")
		shell_help
		exit 1
		;;
	"-upload")	
		shell_upload
		exit 1
		;;
	"-mem")
		shell_meminfo
		exit 1
		;;
	"-keys")
		shell_ssh_keygen
		exit 1
		;;
	"-scpkeys")
		shell_expect
		exit 1
		;;
	"-add")
		shell_add_ip
		exit 1
		;;
	"-show")
		shell_show_ip
		exit 1
		;;
	"-drop")
		shell_drop_ip
		exit 1
		;;
	"-init")
		shell_init
		exit 1
		;;
	*)	shell_exp
		exit 1
		;;
 
esac

LVS实现健康检查脚本

#!/bin/bash
 
#=============================================================================
VIP=10.10.10.100      #集群虚拟IP
CPORT=80        #定义集群端口
FAIL_BACK=127.0.0.1     #本机回环地址
RS=("10.10.10.12" "10.10.10.13")  #编写集群地址
declare -a RSSTATUS       #变量RSSTATUS定义为数组态
RW=("2" "1")
RPORT=80        #定义集群端口
TYPE=g          #制定LVS工作模式：g=DR m=NAT
CHKLOOP=3
LOG=/var/log/ipvsmonitor.log
 
#=============================================================================
 
addrs() {
  ipvsadm -a -t $VIP:$CPORT -r $1:$RPORT -$TYPE -w $2
  [ $? -eq 0 ] && return 0 || return 1
}
 
delrs() {
  ipvsadm -d -t $VIP:$CPORT -r $1:$RPORT
  [ $? -eq 0 ] && return 0 || return 1
}
 
checkrs() {
  local I=1
  
  while [ $I -le $CHKLOOP ]
  do
    if curl --connect-timeout 1 http://$1 &> /dev/null
    then
      return 0
    fi
    
    let I++
  done
  
  return 1
}
 
initstatus() {
  
  local I
  local COUNT=0;
 
  for I in ${RS[*]}
  do
    if ipvsadm -L -n | grep "$I:$RPORT" && > /dev/null
    then
    
      
      RSSTATUS[$COUNT]=1
    else
      RSSTATUS[$COUNT]=0
    fi
      let COUNT++
  done
}
 
#=============================================================================
initstatus
 
while :; do
 
  let COUNT=0
  for I in ${RS[*]}
  do
    if checkrs $I
    then
      if [ ${RSSTATUS[$COUNT]} -eq 0 ]
      then
                    addrs $I ${RW[$COUNT]}
                  [ $? -eq 0 ] && RSSTATUS[$COUNT]=1 && echo "`date +'%F %H:%M:%S'`, $I is back." >> $LOG
      fi
    else
                  if [ ${RSSTATUS[$COUNT]} -eq 1 ]
      then
                    delrs $I
                    [ $? -eq 0 ] && RSSTATUS[$COUNT]=0 && echo "`date +'%F %H:%M:%S'`, $I is gone." >> $LOG
      fi
    fi
    
    let COUNT++
  done
  sleep 5
done

在Bash环境下实现密钥对分发功能，首先创建文件，然后直接分发。

#!/usr/bin/expect
 
set timeout 10
set hostname [lindex $argv 0]
set username [lindex $argv 1]
set password [lindex $argv 2]
 
spawn ssh-copy-id $username@$hostname
 
expect {
            "Are you sure you want to continue connecting (yes/no)?" {
            send "yes\r"
            expect "*password:"
            send "$password\r"
            }
 
            "*password:" {
            send "$password\r"
            }
            "Now try logging into the machine" {
            }
        }
expect eof

在bash中，用expect -c 把expect语句包起来，将expect -c 中的双引号加上反斜杠

#!/bin/bash
 
USER=root
PASSWD=1233
 
# yum install -y expect
 
for HOST in 192.168.1.{1..10}
do
        echo "------------------>" $HOST "-----------------------------"
/usr/bin/expect -c "
spawn ssh-copy-id $USER@$HOST;
expect {
            \"Are you sure you want to continue connecting (yes/no)?\" {
            send \"yes\r\"
            expect \"*password:\"
            send \"$PASSWD\r\"
            }
 
            \"*password:\" {
            send \"$PASSWD\r\"
            }
            \"Now try logging into the machine\" {
            }
        }
expect eof
"
done
Linux Shell 脚本编程基础
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