# mkdir -p /mnt/cdrom
# 如果是光驱：mount -t iso9660 /dev/cdrom /mnt/cdrom/
# 如果是ISO：mount -o loop /usr/local/CentOS-7-x86_64-DVD-1611.iso /mnt/cdrom
# cd /etc/yum.repos.d/
# vi /etc/yum.repos.d/CentOS-CD.repo
[CentOS-CD]
name=CentOS-CD
baseurl=file:///mnt/cdrom
gpgcheck=0
gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-CentOS-7
enabled=1
# yum clean all
# yum update
# yum search ifconfig
# yum install net-tools.x86_64
这个包里有ifconfig，netstat，whois等命令
原文：http://www.cnblogs.com/yuanyee/p/6418246.html