yum      install       softwarename        安裝
yum      remove        softwarename        卸載

mkdir /iso                                  建立目錄
mv /home/kiosk/Desktop/*.iso  /iso           把桌面上的鏡像移到/iso（防止誤操作刪除）
mkdir /source7.0 /source7.3                  掛載點(diǎn)
mount /iso/rhel-server-7.0-x86_64-dvd.iso /source7.3        掛載 

yum clean all             清空yum緩存

yum  install   dhcp   -y            安裝dhcp

 yum install httpd     實(shí)現(xiàn)共享

 systemctl start httpd

 systemctl enable httpd

 systemctl stop firewalld     防止防火墻阻止共享

 systemctl disable firewalld

 mkdir /var/www/html/rh7.3

mount /iso/rhel-server-7.3-x86_64-dvd.iso /var/www/html/rh7.3    掛載是臨時(shí)的，reboot會(huì)后開(kāi)機(jī)全部卸掉，要手動(dòng)重新掛載

vim /etc/rc.d/rc.local     編寫(xiě)在重啟時(shí)開(kāi)機(jī)可以自動(dòng)掛載文件

mount /iso/rhel-server-7.3-x86_64-dvd.iso /var/www/html/rh7.3

chmod 777 /etc/rc.d/rc.local

rm -fr  /etc/yum.repos.d/*

vim /etc/yum.repos.d/yum.repo

[rh7.3]                                                                                                        #[倉(cāng)庫(kù)名]
name=rh7.3                                                                                             #名稱(chēng),為了更清楚的表示
baseurl=http://真機(jī)IP/rh7.3

cd /etc/yum.repos.d/

vim yum.repo