1、Red Hat 7.0 禁用firewalld和修改网卡

# 禁用firewalld:

# systemctl stop firewalld
# systemctl disable firewalld

# 修改主机名：
# hostnamectl set-hostname demo.example.com

# 修改网卡：
# nmcli device status
        DEVICE       TYPE      STATE      CONNECTION  
        eno16777736  ethernet  connected  eno16777736 
        lo           loopback  unmanaged  --     

        # nmcli connection show
        NAME         UUID                                  TYPE            DEVICE      
        eno16777736  1fb51113-0b9c-450a-b435-cfde1b220401  802-3-ethernet  eno16777736 
        
        # nmcli connection add con-name demo  ifname eno16777736 type ethernet autoconnect yes  (dhcp)
        
        # nmcli connection up demo
        # ip a  可以看到一个IP地址
        
        # #nmcli connection modify demo ipv4.method manual ipv4.addresses '192.168.78.128/24 192.168.78.1'        （rhel7.0)
        # nmcli connection modify demo ipv4.method manual ipv4.addresses '192.168.78.128/24' ipv4.gateway 192.168.78.1  (rhel7.1 and after)
        
        # nmcli connection up demo

# 查看firewalld的状态：
systemctl status firewalld

# 查看selinux的状态：
getenforce 

# 查看主机名：
hostnamectl

# 查看网卡状态：
ip a