Shell脚本自动化配置SSH免密登录和取消SSH免密配置脚本

2.实现代码

#!/bin/bash
#Author:cosann
#date:2022/7/21
#description:批量部署SSH免密登录脚本

E_ERROR=65

#传参检测
if [ $# -ne 1 ]
then 
    echo -e "Usage:$0 ip_list_file "
    exit E_ERROR
fi

#初始化
ip_list_file=$1
#从文本读取值初始化变量
ip_address=(`awk '{print $1}' $ip_list_file`)
username=(`awk '{print $2}' $ip_list_file`)
password=(`awk '{print $3}' $ip_list_file`)

#环境配置
rpm -qa | grep "expect" &> /dev/null
if [ $? -ne "0" ]
then
    yum install -y expect &> /dev/null || ( echo -e "部署必须组件Expect失败，请检查Yum配置" && exit E_ERROR )
fi


#打印菜单
echo -e "\n===============================================" 
echo -e "该脚本可以实现批量部署和删除SSH免密配置"   
echo -e "Author:Cosann"
echo -e "Create time:2022/07/27"
echo -e "===============================================" 
    while :
    do
    echo -e ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>" 
    echo -e "1. 配置SHH免密登录"
    echo -e "2. 取消SHH免密配置"
    echo -e "3. 退出程序"
    
    #功能控制及实现
    read -p "请输入序号>>> " nu
    if [[ "$nu" == "3" ]]
    then
        #退出程序
        echo -e "\n###!!!感谢使用，再见!!!###"
        exit 0

    elif [[ "$nu" == "1" ]]
    then    
        echo "开始推送"

        #检测公钥文件是否存在，不存在则生成
        if ! [ -e "/root/.ssh/id_rsa.pub" ];then
            ssh-keygen -t rsa -F "" -f /root/.ssh/id_rsa
        else
            echo -e "已创建公钥文件，开始向远端服务器推送公钥"
        fi

        #循环控制
        count=`grep -v '^$' $ip_list_file | wc -l `
        for (( i=0;i<$count;i++ ))
        do
            #echo -e "${ip_address[$i]}\t${username[$i]}\t${password[$i]}"
            #自动化交互实现推送ssh公钥
            /usr/bin/expect<<-EOF
            spawn ssh-copy-id -i $HOME/.ssh/id_rsa.pub ${username[$i]}@${ip_address[$i]}
            expect {
            "*yes/no"    { send "yes\r";exp_continue }
            "*password"  { send "${password[$i]}\r" }
        }
        expect eof
EOF
        done
        echo -e "--------------------------------------------------------------------------------------"
        echo -e "--------------------------------------------------------------------------------------"
        echo -e "--------------------------------------------------------------------------------------"
        echo -e "###推送完成，尝试免密登录###"
        #推送公钥成功免密结果通知
        for (( i=0;i<$count;i++ ))
        do
            /usr/bin/expect<<-EOF
            spawn ssh ${username[$i]}@${ip_address[$i]}
            expect "*]#"
            send "echo "##登录成功##"\r"
            expect "*]#"
            send "exit\r"
EOF
        done
        echo -e "-------------------------------------------"
        echo -e "已完成SHH免密配置,请尝试SHH登录远端主机确认"

    elif [[ "$nu" == "2" ]]
    then
        #自动化交互实现删除配置免密的远程主机上的authorized_keys
        count=`grep -v '^$' $ip_list_file | wc -l `
        for (( i=0;i<$count;i++ ))
        do
        /usr/bin/expect<<-EOF
        spawn ssh ${username[$i]}@${ip_address[$i]}
        expect "*]#"    
        send "rm -f /root/.ssh/authorized_keys 2> /dev/null\r"
        expect "*]#"
        send "exit\r"
EOF
        done 
        echo -e "-------------------------------------------"
        echo -e "已取消SHH免密配置,请尝试SHH登录远端主机确认"

    else
        echo -e "\033[41;37m 非法输入，请检查输入!!! \033[0m"
    fi
done