脚本需不断累积。。。我好累.。。。更新中

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## 1.编写 hello world 脚本
echo "Hello word"

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## 每周5使用tar命令备份/var/log下的所有日志文件
#编写备份脚本 备份后的文件名包含日期标签 防止后面的备份将前面的备份数据覆盖
#注 意 date 命令需要使用反引号括起来，反引号在键盘 < tab>键上面
#vim /root/logbak.sh
tar -czf log-`data +%F %T`.tar.gz /var/log
#crontab -e                  #编写计划任务，执行备份脚本
00 03 * * 5 /root/logbak.sh

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#编写一个 shell 脚本，实现猜数字游戏数字答案为 1 到 100 的随机数，执行脚本后等待用户输入数字，若猜中则结束游戏，未猜中则返回答案和所输入数字的大小关系，最多可以猜5次，5次均未猜中则结束游戏
num=$[RANDOM%100+1]
for ((i=1;i<=5;i++));do
        read -p "计算机生成了一个1-100的随机数 你猜:" cai
        if [ $cai -eq $num ];then
                echo "ohoo...so luckly.您猜对了"
                exit
        elif [ $cai -gt $num ];then
                echo "so bad.. 您猜大了"                                                                             
        else
                echo "so bad..您猜小了"
        fi
done

#自建CA
if [ ! -d /etc/pki/CA ];then
	mkdir /etc/pki/CA/{certs.newcerts,private,crl} -pv &> /dev/null
	cd /etc/pki/CA
	(umask 077;openssl genrsa -out private/cakey.pem 1024)
expect <<EOF
	spawn openssl req -new -x509 -key private/cakey.pem -out cacert.pem -days 3650 
	expect ":" {send "CN\n"}
	expect ":" {send "beijing\n"}
	expect ":" {send "beijing\n"}
	expect ":" {send "magedu\n"}
	expect ":" {send "devops\n"}
	expect ":" {send "ca.magedu.com\n"}
	expect ":" {send "[email protected]\n"}
	expect eof
EOF
fi
	[ -f /etc/pki/CA/index.txt ] || touch /etc/pki/CA/index.txt
	[ -f /etc/pki/CA/serial ] || echo 0F > /etc/pki/CA/serial

#vim crt.sh
if [ -f /data/$csr ];then
 cer=`echo $csr|cut -d. -f1`
	expect <<EOF
	spawn openssl ca -in /data/$csr -out /etc/pki/CA/certs/$cer.crt -days 666
	expect "]:" {send "y\n"}
	expect "]" {send "y\n"}
	expect eof
EOF
fi

#编写一个 shell 脚本，该脚本可以实现在 CenOS7.6 系统上快速部署一个基于 http 的 yum 私有仓库源，该源的软件包由对应的系统光盘 dvd1 提供。
#1. install httpd server
yum install httpd -y 

#2. enable httpd service
systemctl enable httpd
systemctl restart httpd

#3. mount os iso dvd
mkdir -pv /cdrom &> /dev/null
echo "/dev/cdrom /cdrom iso9660 ro 0 0" >> /etc/fstab

mount -a

cd /etc/yum.repos.d/

mkdir -pv bak &> /dev/null

mv *.repo bak

echo '[base-iso]' > base.repo
echo 'baseurl=file:////misc/cd/BaseOS' >> base.repo
echo 'gpgcheck=0' >> base.repo

cd

# make symbolic link
ln -s /cdrom /var/www/html/centos7
yum clean all

#打印国际象棋
red(){
	echo -e "\033[41m        \033[0m\c"
}
yel(){
	echo -e "\033[43m        \033[0m\c"	
}
redyel(){
	for ((i=1;i<=4;i++));do
		for ((j=1;j<=4;j++));do
			red;yel
		done
		echo
	done
}
yelred(){
	for ((i=1;i<=4;i++));do
		for ((j=1;j<=4;j++));do
			yel;red
		done
		echo 
	done
}
for ((line=1;line<=8;line++));do
	[ $[$line%2] -eq 0 ] && redyel || yelred
done

#打印99乘法表
for i in {1..9};do
	for j in `seq $i`;do
		echo -e "${j}x${i}=$[i*j]\t\c"
	done
	echo 
done