From e7aab2169877754424ce0ff7f9772fb086ab2514 Mon Sep 17 00:00:00 2001
From: diandian <xingdianvip@gmail.com>
Date: Sat, 15 Apr 2023 23:22:26 +0800
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-<h1><center>shell脚本案例</center></h1>
-
-作者：行癫（盗版必究）
-
-------
-
-## 一：脚本案例
-
-#### 1.配置静态IP案例
-
-```shell
-#!/bin/bash
-# This script configures a static IP address on CentOS 7
-
-# Define variables for the IP address, netmask, gateway, and DNS servers
-IP_ADDRESS=192.168.1.100
-NETMASK=255.255.255.0
-GATEWAY=192.168.1.1
-DNS_SERVERS="8.8.8.8 114.114.114.114"
-
-# Backup the original network configuration file
-cp /etc/sysconfig/network-scripts/ifcfg-ens33 /etc/sysconfig/network-scripts/ifcfg-ens33.bak
-
-# Modify the network configuration file with the static IP address, netmask, gateway, and DNS servers
-cat << EOF > /etc/sysconfig/network-scripts/ifcfg-ens33
-TYPE=Ethernet
-BOOTPROTO=none
-NAME=ens33
-DEVICE=ens33
-ONBOOT=yes
-IPADDR=$IP_ADDRESS
-NETMASK=$NETMASK
-GATEWAY=$GATEWAY
-DNS1=${DNS_SERVERS%% *}
-DNS2=${DNS_SERVERS##* }
-EOF
-
-# Restart the network service to apply the changes
-systemctl restart network
-
-# Display the new network configuration
-ip addr show ens33
-```
-
-centos stream 9
-
-```shell
-[root@xingdiancloud ~]# bash network.sh
-#!/bin/bash
-#auther：xingdian
-NET_DIR=`ls /etc/NetworkManager/system-connections/`
-NET_PATH="/etc/NetworkManager/system-connections/"
-read -p "请输入IP地址: " ipadd
-read -p "请输入子网掩码,例如24: " netmask
-read -p "请输入默认网关: " gateway
-read -p "请输入dns地址: " dns
-read -p "输入设备名字: " name
-# 备份原配置
-if [ -f ${NET_PATH}${name}.nmconnection.bak ];then
-        rm -rf ${NET_PATH}${name}.nmconnection.bak
-else
-        cp ${NET_PATH}${NET_DIR} ${NET_PATH}${NET_DIR}.bak
-fi
-cat > ${NET_PATH}${name}.nmconnection <<eof
-[connection]
-id=$name
-uuid=639d6c39-a14a-36f9-b18f-7c1ff3c082d7
-type=ethernet
-autoconnect-priority=-999
-interface-name=$name
-timestamp=1681589526
-
-[ethernet]
-
-[ipv4]
-method=manual
-address1=$ipadd/$netmask,$gateway
-dns=$dns
-
-[ipv6]
-addr-gen-mode=eui64
-method=auto
-
-[proxy]
-eof
-
-nmcli c reload
-nmcli c up $name
-
-#systemctl restart NetworkManager
-```
-
-#### 2.系统初始化脚本
-
-```shell
-#!/bin/bash
-#centos7： 初始化脚本
-#auther：xingdian
- 
-# 防火墙设置
- 
-echo "关闭防火墙和selinux中...."
- 
-echo
-        systemctl stop firewalld && systemctl disable firewalld &> /dev/null
-        
-        if [ $? -eq 0 ];then
-                echo "防火墙已经成功关闭....."
-        else
-                echo "防火墙关闭失败，请手动关闭！！！"
-        fi
-        
-        setenforce 0 &&  sed -i '/^SELINUX/c SELINUX=disabled' /etc/selinux/config
- 
-        if [ $? -eq 0 ];then
-                echo "selinux已经成功关闭....."
-        else
-                echo "selnux关闭失败，请手动关闭！！！"
-        fi
-echo
- 
-# 外网检测
-echo "正在检测网络是否能上外网......"
- 
-echo
- 
-        ping -c 2 www.baidu.com &> /dev/null
- 
-        if [ $? -eq 0 ];then
-                echo "网络正常"
-        else
-                echo "网络不可达！"
-        fi
-echo
- 
-# 配置yum源-这里选用阿里源
- 
-echo "配置yum源中....."
-echo
-        yum install -y wget &> /dev/null
-        if [ $? -ne 0 ];then
-                echo "wget 安装失败........."
-                systemctl restart network
-                yum repolist &> /dev/null
-                sleep 2
-        fi
-        mkdir -p /root/YUM_backup
-        mv /etc/yum.repos.d/* /root/YUM_backup
-        wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo &>/dev/null
-        wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo &>/dev/null
-        yum clean all &>/dev/null && yum reppolist &>/dev/null
-        echo "你的yum源有:" $(ls /etc/yum.repos.d)
-        sleep 2
- 
-# 配置主机名和host文件
- 
-echo "正在配置你的主机名..."
- 
-echo
-        read -p "请输入你的主机名:" host 
- 
-        hostname(){
-                hostnamectl set-hostname $host
-        }
-        hostname host && echo -e "主机名设置成功!!"
- 
-echo "正在配置你的hosts文件..."
-        ip=$(ip a | grep ens33 |grep inet |awk '{print $2}' | awk -F"/" '{print $1}')
-        echo "$ip $host" >> /etc/hosts
-        echo  "hosts配置完成!!!"
- 
-# 安装基础软件包
- 
-        echo "安装基础软件包中....."
-        echo
- 
-        yum install -y vim wget unzip yum_utils &>/dev/null
-        if [ $? -eq 0 ];then
-                echo "安装完成....."
-        else
-                echo "安装失败..... "
-        fi
-# 时间同步
-echo
-        echo "时间同步中……"
-        yum install -y ntpdate &> /dev/null
-        ntpdate cn.pool.ntp.org &> /dev/null
-        file=$(who | head -1 | cut -d" " -f1)
-        echo "* */1 * * * /usr/sbin/ntpdate   cn.pool.ntp.org" > /var/spool/cron/$file
-        if [ $? -eq 0 ];then
-                echo "时间同步成功！！！"
-                echo "unset MAILCHECK" >> /etc/profile
-                source /etc/profile &> /dev/null
-        else
-                echo "时间同步失败！！！"
-        fi
-```
-
-#### 3.获取系统信息
-
-```shell
-#!/bin/bash
-#此脚本获取系统centos7.x/centos stream9.x
-#auther：xingdian
-
-#查看服务器硬件型号
-hard_type=`dmidecode |grep "Product Name"|tr "\n" " "` #获取服务器型号
-sn=`dmidecode |grep -A 3 "Product Name" |grep "Serial Number"|grep -v "None"` #获取硬件序列码
-
-##系统信息
-version=`cat /etc/redhat-release` #版本
-kernel=`uname -r` #内核
-
-##cpu
-phy_cpu_num=`grep 'physical id' /proc/cpuinfo | sort | uniq | wc -l` #物理CPU数量
-nuclear=`grep vendor_id /proc/cpuinfo|wc -l` #逻辑核数(线程)
-
-##内存\Swap
-mem=`free -m|grep Mem|awk '{print $2"M"}'` #内存总大小
-user_mem=`free -m|grep Mem|awk '{print $3"M"}'` #已用内存大小
-swap=`free -m |grep Swap|awk '{print $2"M"}'` #swap总大小
-user_swap=`free -m |grep Swap|awk '{print $3"M"}'` #已用swap大小
-
-#最大支持内存数
-max_memory=`dmidecode|grep -P 'Maximum\s+Capacity'`
-
-##负载
-loadavg=`uptime |awk -F: '{print $NF}'` #系统负载
-
-##网络
-network=`[[ $(curl -o /dev/null --connect-timeout 3 -s -w "%{http_code}" www.baidu.com) -eq 200 ]] && echo yes || echo no` #根据curl www.baidu.com的返回状态码来判断是否能上网
-ip_addr=`ip address|grep -w "inet"|grep -v "127.0.0.1"|awk -F "[ /]+" '{print $3,$NF}'` #获取除了回环地址之外的所有网卡的ip地址和对应的网卡名
-##磁盘
-disk_zong=`df -Th | grep -w '/' | awk '{print $3}'` #获取系统盘的总大小
-disk_user=`df -Th | grep -w '/' | awk '{print $4}'` #获取系统盘已用大小
-disk_lsbl=`lsblk` #硬盘分区分布
-##其他
-system_time=`awk '{a=$1/86400;b=($1%86400)/3600;c=($1%3600)/60;d=$1%60} {printf("%ddays, %d:%d:%d\n",a,b,c,d)}' /proc/uptime` #开机时长
-sys_begin=`date -d "$(awk -F. '{print $1}' /proc/uptime) second ago" +"%Y-%m-%d %H:%M:%S"` #开机时间
-##日志
-system_log=`du -sh /var/log/ |awk '{print $1}'` #系统日志大小
-#进程
-tasks=`top -n1 |grep Tasks |awk '{print $2,$4,6}'` #总 运行 休眠
-
-system(){
-echo "
-|硬件型号：
-$hard_type
-|序列号：
-$sn
-|版本： $version
-|内核： $kernel
-
-|物理CPU个数：$phy_cpu_num 逻辑核数： $nuclear"个"
-|负载：$loadavg
-
-|内存： $mem #最大支持内存：$max_memory
-|已用： $user_mem
-|swap: $swap
-|已用: $user_swap
-
-|是否可以上网： $network
-|本地IP地址:
-$ip_addr
-
-|系统磁盘大小: $disk_zong
-|系统磁盘已用: $disk_user
-|日志： 系统日志大小为$system_log
-|开机： $sys_begin
-|至今： $system_time
-硬盘分区
-----------------------------------------------------------------------
-$disk_lsbl
-----------------------------------------------------------------------
-
-----------------------------------------------------------------------
-"
-}
-system
-##端口扫描
-echo "监听的端口扫描
-----------------------------------------------------------------------"
-portarray=(`sudo netstat -tnlp|egrep -i "$1"|awk {'print $4'}|awk -F':' '{if ($NF~/^[0-9]*$/) print $NF}'|sort|uniq`)
-length=${#portarray[@]}  #统计元素个数
-printf "{\n"
-printf '\t'port":"
-for ((i=0;i<$length;i++))
-do
-printf '\n\t\t{'
-printf "\"{#TCP_PORT}\":\"${portarray[$i]}\"}"
-if [ $i -lt $[$length-1] ];then
-printf ','
-fi
-done
-printf "\n\t\n"
-printf "}\n"
-echo "----------------------------------------------------------------------
-"
-```