Linux的课堂便利脚本

上课的时，因为教室机总会重新重启，有时候就要重配网卡yum源和下载一些辅助工具，这里写一个脚本省去冗杂的过程

if [[]]可以防止unary operator expected的报错
nmcli device connect eno16777728 可以快速配网
复制以下代码

#!/bin/bash
echo '                        this is a convenient sh '
echo '                            author supermao'
read -p  'please configure host-only network video 192.168.10.0/24 and link image file:(yes/no)' choice
if [[ $choice = yes ]];then
    nmcli connection delete supermao   &> /dev/null
    nmcli connection add con-name supermao ifname $(ip a | grep BROADCAST| cut -d : -f2) type ethernet &> /dev/null
    nmcli connection modify supermao ipv4.method manual ipv4.address 192.168.10.100/24  &> /dev/null
    echo 'address 192.168.10.100/24 configure network is ok'

rm -rf /etc/yum.repos.d/*
cat > /etc/yum.repos.d/local.repo << q
[centos]
name=centos
baseurl=file:///media
gpgcheck=0
enabled=1
q
	if [[ $(tail -n 1 /etc/fstab) = '/dev/cdrom  /media  iso9660  defaults  0  0' ]];then
	echo  'pass'
	else
	echo '/dev/cdrom  /media  iso9660  defaults  0  0'  >> /etc/fstab
	mount -a
	fi
yum clean all &> /dev/null

echo 'configure yum is ok'

yum -y install vim &> /dev/null
echo 'vim is ok'
yum -y install net-tools &> /dev/null
echo 'netstat is ok'
yum -y install httpd &> /dev/null
echo  'httpd is ok'
yum -y install bash* &> /dev/null
echo   'bash* is ok'
yum -y install samba &> /dev/null
echo  'samba is ok'
yum -y install mariadb mariadb-server &> /dev/null
echo  'mariadb is ok'
yum -y install policycoreutils-python* &> /dev/null
echo  'semanage is ok'
getenforce
systemctl status firewalld |grep Active
hostnamectl set-hostname maoqiyang
for i in `seq 1 3`;do
echo 'new environment'
done
bash
else
echo 'run failed'
fi

如果复制在了txt里
linux运行时则报错
vim
set ff #查看文件格式
fileformat=dos
set ff=unix #改为unix格式