zhengdingfeng

5555555555555555555555
mkdir shell
cd shell
vi test001.sh

#!/bin/bash
echo “please input 1 or 2 or 3”
read x
if (x1)then
sudo vim /etc/apt/sources.list
#beifenyuanlaideyuan
sudo apt-get update
sudo apt-get upgrade
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
else if (x2)then
sudo vim /etc/apt/sources.list
#beifenyuanlaideyuan
sudo apt-get update
sudo apt-get upgrade
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
else if (x==3) then
sudo vim /etc/apt/sources.list
#beifenyuanlaideyuan
sudo apt-get update
sudo apt-get upgrade
######## Ubuntu18.04 阿里云镜像源 ###############
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
######## 阿里云镜像源 END ###############
fi
fi
fi
#yum clean all
#yum makecache
sudo apt-get clean
sudo apt-get update
~

sh test001.sh
sudo /bin/bash test001.sh

1111111111111111
mkdir usr
cd usr
vi test002.sh

#! /bin/bash
source=/usr
if [ ! -d “ s o u r c e " ] t h e n m k d i r " source"] then mkdir " source"]thenmkdir"source”
fi

for((i=i;i<=20;i++))
do
mkdir /usr/stu i c h m o d 754 / u s r / s t u i chmod 754 /usr/stu ichmod754/usr/stui
done
echo “ok”

sudo /bin/bash test002.sh

333333333333333333
ifconfig -a

vi test003.sh

#! /bin/bask
for((i=30;i<=130;i++))
do
if ping -c 1 -w 1 172.17.31. i > / d e v / n u l l ; t h e n e c h o " p i n g 172.17.31. i >/dev/null; then echo "ping 172.17.31. i>/dev/null;thenecho"ping172.17.31.{i} success!"
else
echo “ping 172.17.31.${i} fail!”
fi
done

sudo /bin/bash test003.sh