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jacob0011jacob0011
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linux shell book
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‎chaper01/autofdisk.sh‎

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#!/bin/bash
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#本脚本会自动将vdb整个磁盘分成一个区,将将该分区格式化.
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#注意:所有数据均将丢失!!!
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#n(新建分区),p(新建主分区),1(主分区编号为1)
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#回车(从磁盘哪个位置开始分区,默认从第1个扇区)
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#回车(分区到哪个扇区结束,回车代表最后,将整个磁盘分1个区)
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#wq(保存退出),mkfs.xfs(格式化命令)
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fdisk /dev/vdb << EOF
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n
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p
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1
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wq
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EOF
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mkfs.xfs /dev/vdb1
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#这里文件或目录的属性测试知识点，可以参考2.4章节的内容
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[ ! -d /data ] && mkdir /data
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cat >> /etc/fstab << EOF
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/dev/vdb1 /data xfs defaults 0 0
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EOF
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mount -a

‎chaper01/automail.sh‎

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#!/bin/bash
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#语法格式:
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#命令 << 分隔符
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#内容
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#分隔符
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#系统会自动将两个分隔符之间的内容重定向传递给前面的命令，作为命令的输入。
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#注意：分隔符是什么都可以，但前后分隔符必须一致。推荐使用EOF(end of file)
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mail -s warning root@localhost << EOF
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This is content.
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This is a test mail for redirect.
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EOF

‎chaper01/calc.sh‎

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#!/bin/bash
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#计算1+2+3...+n的和,可以使用n*(n+1)/2公式快速计算结果
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read -p "请输入一个正整数:" num
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sum=$[num*(num+1)/2]
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echo -e "\033[32m$num以内整数的总和是:$sum\033[0m"
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#使用三角形的底边和高计算面积:A=1/2bh
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read -p "请输入三角形底边长度:" bottom
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read -p "请输入三角形高度:" hight
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A=$(echo "scale=1;1/2*$bottom*$hight" | bc)
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echo -e "\033[32m三角形面积是:$A\033[0m"
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#梯形面积:(上底+下底)*高/2
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read -p "请输入梯形上底:" a
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read -p "请输入梯形下底:" b
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read -p "请输入梯形高度:" h
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A=$(echo "scale=2;($a+$b)*$h/2" | bc)
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echo -e "\033[32m梯形面积是:$A\033[0m"
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#使用A=πr^2计算圆的面积,取2位小数π=3.14
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read -p "请输入圆的半径:" r
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A=$(echo "scale=2;3.14*$r^2" | bc)
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echo -e "\033[32m圆的面积是:$A\033[0m"
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echo "3282820KiB等于多少GiB?"
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G=$(echo "32828920/1024/1024" | bc)
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echo -e "\003[32m答案${G}G\033[0m"
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#注意使用{}防止变量名歧义
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#时间格式转化
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read -p "请输入秒数:" sec
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ms=$[sec*1000]
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echo -e "\033[32m$sec秒=$ms毫秒\033[0m"
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us=$[sec*1000000]
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echo -e "\033[32m$sec秒=$us微秒\033[0m"
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hour=$(echo "scale=2;$sec/60/60"|bc)
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echo -e "\033[32m$sec秒=$hour小时\033[0m"
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‎chaper01/echo_menu.sh‎

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#!/bin/bash
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#version:1.0
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#这个脚本仅演示菜单输出，没有具体的功能实现
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echo "这是一个打印菜单的例子"
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echo "1.查看网卡信息"
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echo "2.查看内存信息"
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echo "3.查看磁盘信息
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4.查看CPU信息
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5.查看账户信息"
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#!/bin/bash
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#Version:2.0
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clear
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echo -e "\033[42m---------------------------------\033[0m"
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echo -e "\e[2;10H这里是菜单\t\t#"
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echo -e "#\e[32m 1.查看网卡信息\e[0m #"
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echo -e "#\e[33m 2.查看内存信息\e[0m #"
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echo -e "#\e[34m 3.查看磁盘信息\e[0m #"
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echo -e "#\e[35m 4.查看CPU信息\e[0m #"
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echo -e "#\e[36m 5.查看账户信息\e[0m #"
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echo -e "\033[42m---------------------------------\033[0m"
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echo

‎chaper01/exit.sh‎

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#!/bin/bash
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exit

‎chaper01/first.sh‎

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#!/bin/bash
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<<COMMENT
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Author:Jacob
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Date:2018-8-8
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Version:1.0
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Description:This is my first script
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COMMENT
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#echo命令可以会先一行字符串，echo后给什么字串屏幕将回显什么字串
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echo "hello the world"

‎chaper01/heredoc_tab.sh‎

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#!/bin/bash
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#不能屏蔽Tab键,缩进将作为内容的一部分被输出
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#注意hello和world前面是tab键
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cat << EOF
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hello
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world
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EOF
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#Tab键将被忽略,仅输出数据内容
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cat <<- EOF
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hello
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world
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EOF

‎chaper01/heredocument.sh‎

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#!/bin/bash
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cat > /tmp/test.txt << HERE
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该文件为测试文件。
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测试完后，记得将该文件删除。
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Welcome to Earth.
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HERE
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‎chaper01/printf_menu.sh‎

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#!/bin/bash
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#Version:1.0
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clear
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printf "\e[42m%s\n\e[0m" "---------------------------------"
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printf "\e[2;10H%s\t\t\n" "这里是菜单"
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printf "\e[32m%s\e[0m\n" "1.查看网卡信息"
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printf "\e[35m%s\e[0m\n" "2.查看内存信息"
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printf "\e[36m%s\e[0m\n" "3.查看磁盘信息"
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printf "\e[34m%s\e[0m\n" "4.查看CPU信息"
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printf "\e[33m%s\e[0m\n" "5.查看账户信息"
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printf "\e[42m%s\n\e[0m" "---------------------------------"
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echo
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‎chaper01/sleep.sh‎

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#!/bin/bash
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sleep 1000

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