Linux服务器集群- CentOS 7 虚拟机实验环境

#vi /etc/selinux/config
SELINUX=disabled

#setenforce 0

如开放22端口
firewall-cmd --zone=public --add-port=22/tcp --permanent
firewall-cmd --reload

或直接关闭防火墙
service firewalld stop
chkconfig firewalld off

service network restart

mkdir /mnt/cdrom
mount -t iso9660 /dev/cdrom/ /mnt/cdrom

cd /etc/yum.repos.d/
mkdir backup
mv * backup/
cp -a backup/CentOS-Media.repo . #备份原有源

vi CentOS-Media.repo
#填入或更新下面内容
    baseurl = file:///mnt/cdrom
    gpgcheck=0
    enabled=1

yum clean all #更新yum源

yum -y install gcc gcc-c++ lrzsz