auto_modify_ip Shell脚本安装

#!/bin/bash
#2019.7. :
#This author is DKS
#auto modify ip of linux
###############################
IP_NAME="ifcfg-ens33"
IP_DIR="/etc/sysconfig/network-scripts/"

TEMP=$(mktemp -t test.XXXXXX)
TEMP1=$(mktemp -t test1.XXXXXX)
TEMP2=$(mktemp -t test2.XXXXXX)
#
cd $IP_DIR
if [ ! -d ip_back ];then
    mkdir ip_back
fi
#获取备份编号
judge_var(){
    VAR=`find ${IP_DIR}ip_back/ -type f -name "ifcfg-ens33*"|awk -F\. '{print $2}'|sort |sed -n '$p'|grep -oE "[0-9]{0,3}"`
    if [ $VAR -ge  ];then
        VAR=$(expr $VAR + )
    else
        VAR=
    fi
    IP_BACK="${IP_DIR}ip_back/ifcfg-ens33.back$VAR"
    ip_back_name="ifcfg-ens33.back$VAR"
}
#
#ip地址备份
ip_back(){
    judge_var
    cp $IP_NAME $IP_BACK
    dialog --title "备份为" --msgbox "$ip_back_name"
}
#
#ip地址状态判断
test_ip_status(){
    STATUS=`sed -n '/BOOTPROTO/p' ${IP_NAME}|awk -F\= '{print $2}'`
    dialog --title "当前状态" --msgbox "${STATUS}"
    while [  ]
    do
        dialog --inputbox "修改状态为dhcp或static"   >$TEMP1
        if [ $? -eq  ];then
            BREAK=
            break
        fi
        status=`cat $TEMP1`
        if [[ $status == static ]];then
            local temp="static"
            BREAK=
            break
        elif [[ $status == dhcp ]];then
            local temp="dhcp"
            BREAK=
            break
        else
            dialog --msgbox "输入错误"
        fi
    done
    if [ $BREAK -eq  ];then
        dialog --yesno "您的输入为：\n$temp "
        if [ $? -eq  ];then
            ip_back
            sed -i "s/BOOTPROTO=${STATUS}/BOOTPROTO=${temp}/g" $IP_NAME
            dialog --title "修改后状态" --msgbox "$(cat $IP_NAME)"
        elif [ $? -eq  ];then
            dialog --msgbox "已取消修改"
        fi
    fi
}
#
#ip地址修改
cat_modify_ip(){
cat >> ${IP_NAME} <<eof
IPADDR="$1"
NETMASK="255.255.255.0"
GATEWAY="192.168.2.1"
DNS1="114.114.114.114"
eof
}
modify_ip(){
    STATUS=`sed -n '/BOOTPROTO/p' ${IP_NAME}|awk -F\= '{print $2}'`
    dialog --title "当前状态" --msgbox "\n    $STATUS"
    if [[ $STATUS == static ]];then
        while [  ]
        do
            dialog --title "请输入IP：" --inputbox "例：192.168.2.XXX"   >$TEMP2
            if [ $? -eq  ];then
                break
            fi
            ip=$(cat $TEMP2)
            judge_ip=`echo $ip |grep -E "\<([0-9]{1,3}\.){3}([0-9]{1,3})\>"`
            if [[ $ip == $judge_ip ]];then
                local txt=
                dialog --title "您的输入为：" --msgbox "\n$ip"
            else
                local txt=
            fi
            if [ $txt -eq  ];then
                if [ -z `sed -n "/IPADDR/p" $IP_NAME` ];then
                    ip_back
                    cat_modify_ip $ip
                    dialog --title "已修改为" --msgbox "$(cat $IP_NAME)"
                    break
                else
                    ip_back
                    old_ip=`sed -n '/IPADDR/p' $IP_NAME | awk -F\= '{print $2}'`
                    sed -i "s/IPADDR=${old_ip}/IPADDR=${ip}/g" $IP_NAME
                    dialog --title "已修改为" --msgbox "$(cat $IP_NAME)"
                    break
                fi
            elif [ $txt -eq  ];then
                dialog --msgbox "输入错误"
            fi
        done
    elif [[ $STATUS == dchp ]];then
        break
    fi
}
#
#ip地址回滚
rool_back(){
    judge_var
    VAR=$(expr $VAR - )
    if [ $VAR le  ];then
        VAR=
    fi
#获取备份
    IP_BACK="${IP_DIR}ip_back/ifcfg-ens33.back$VAR"
    ip_back_name="ifcfg-ens33.back$VAR"

    mv  $IP_BACK $IP_NAME
    VAR=$[ $VAR -  ]

    dialog --title "回滚备份" --msgbox "$ip_back_name"
    dialog --title "IP已回改为" --msgbox "$(cat $IP_NAME)"
}
##
#重启网卡
restart_network(){
    dialog --title "是否重启当前网络配置" --yesno "$(cat $IP_NAME)"
    if [ $? -eq  ];then
        service network restart &>/dev/null
        if [ $? -eq  ];then
            dialog --msgbox "重启成功"
        else
            dialog --msgbox "重启失败"
        fi
    elif [ $? -eq  ];then
        dialog --msgbox "已取消操作"
    fi
}
##
##程序实现
while [  ]
do
    dialog  --menu "自动修改服务器IP脚本"     "检测IP状态并修改"  "修改IP地址"  "IP地址回滚"  "重启网卡"  "退出" >$TEMP
    if [ $? -eq  ];then
        break
    fi
    selection=$(cat $TEMP)
    case $selection in
        )
        test_ip_status
        ;;
        )
        modify_ip
        ;;
        )
        rool_back
        ;;
        )
        restart_network
        ;;
        )
        break
        ;;
        *)
        dialog --msgbox "输入错误"
    esac
done
rm -r $TEMP > /dev/null
rm -r $TEMP1 > /dev/null
rm -r $TEMP2 > /dev/null