树莓派进阶之路 (011)

我们先来看一下树梅派网卡的默认的相关配置：

网卡的配置文件：/etc/network/interfaces

# interfaces(5) file used by ifup(8) and ifdown(8)
# Please note that this file is written to be used with dhcpcd
# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d

auto lo                                                 //自动获取
iface lo inet loopback                                  //本地回环

iface eth0 inet manual                                  //设置eth0的状态遵循手册

allow-hotplug wlan0                                     //允许-热插拔 wlan0
iface wlan0 inet manual                                 //设置wlan0为状态遵循手册
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf    //wpa协议文件的位置

allow-hotplug wlan1                                     //允许-热插拔 wlan1
iface wlan1 inet manual                                 //设置wlan1为状态遵循手册
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf    //wpa协议文件的位置

这个文件的网卡设置方式是方式是和dhcpcd一起使用的，如果要使用静态IP，请参考/etc/dhcpcd.conf和man dhcpcd.conf文件。 

iface lo inet loopback 设置名称为lo的网卡，为本地回环

iface eth0 inet manual 设置名称为eth0的网卡，网卡服从本地的系统的默认配置文件：/etc/network/interfaces.dpkg-old

allow-hotplug wlan0 设置名称为wlan0的网卡，网卡的配置服从配置文件并支持热插拔：/etc/wpa_supplicant/wpa_supplicant.conf

静态配置文件：/etc/dhcpcd.conf

# A sample configuration for dhcpcd.
# See dhcpcd.conf(5) for details.

# Allow users of this group to interact with dhcpcd via the control socket.
#controlgroup wheel

# Inform the DHCP server of our hostname for DDNS.
hostname

# Use the hardware address of the interface for the Client ID.
clientid
# or
# Use the same DUID + IAID as set in DHCPv6 for DHCPv4 ClientID as per RFC4361.
#duid

# Persist interface configuration when dhcpcd exits.
persistent

# Rapid commit support.
# Safe to enable by default because it requires the equivalent option set
# on the server to actually work.
option rapid_commit

# A list of options to request from the DHCP server.
option domain_name_servers, domain_name, domain_search, host_name
option classless_static_routes
# Most distributions have NTP support.
option ntp_servers
# Respect the network MTU.
# Some interface drivers reset when changing the MTU so disabled by default.
#option interface_mtu

# A ServerID is required by RFC2131.
require dhcp_server_identifier

# Generate Stable Private IPv6 Addresses instead of hardware based ones
slaac private

# A hook script is provided to lookup the hostname if not set by the DHCP
# server, but it should not be run by default.
nohook lookup-hostname

eth0的默认配置手册：/etc/network/interfaces.dpkg-old

auto lo                         //自动获取
iface lo inet loopback          //测试回路
iface eth0 inet dhcp            //eth0的网络IP为dhcp(自动获取)

wlan0网卡配置文件：/etc/wpa_supplicant/wpa_supplicant.conf

country=GB
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1