linux网络属性配置

Posted 2020-06-27

linux网络属性配置分动态分配和静态指定

动态分配主要依靠DHCP服务器

静态指定需要命令手动分配

静态指定命令三家族

ifcfg家族

iproute2家族

nm家族

ifcfg家族：

ifconfig：接口及地址查看和管理

ifconfig -a 显示所有接口包括inactive

ifconfig interface up|down 开关端口

ifconfig interface address netmask 修改端口ip地址

route：路由查看及管理

route -n 查看主机路由条目以数字形式表示

route add [-net|-host] target [netmask Nm] [gw Gw] [[[dev] If] 添加路由

route del [-net|-host] target [gw Gw] [netmask Nm] [[dev] If] 删除路由

添加删除默认路由

route add default gw 192.168.10.1 

route del default

netstat：状态及统计数据查看

netstat -rn 与 route -n 相同：显示路由

netstat [--tcp|-t] [--udp|-u] [--udplite|-U] [--sctp|-S] [--raw|-w] [--listening|-l] [--all|-a] [--numeric|-n] [--extend|-e[--extend|-e]] [--program|-p]

常用组合：

-tan：数字形式显示所有TCPsockets

-uan：数字形式显示所有UDPsockets

-tnl：数字形式显示监听状态TCPsockets

-unl：数字形式显示监听状态UDPsockets

-tunlp：数字形式显示监听状态TCP、UDPsockets的相关进程及PID

netstat -i 显示所有接口统计数据

netstat -Iinterface 显示指定接口统计数据

iproute2家族：

ip [ OPTIONS ] OBJECT { COMMAND | help }

OBJECT := { link | addr | route | netns }

ip link:网络设备配置

ip link set DEVICE { up | down }|multicast { on | off } |name NEWNAME |mtu MTU |netns PID

ip link show DEVICE

ip route:路由表管理

ip route { add | del | show | flush | get }

示例：

# ip route add 192.168.1.0/24 via 10.0.0.1 dev eth1 src 10.0.20.100

# ip route add default via GW

# ip route delete 192.168.2.0/24

# ip route get 192.168.3.0/24

ip address:协议地址管理

ip address { add | del } IFADDR dev STRING

ip address { show | flush } [ dev STRING ]

ip netns:进行网络命名空间管理

ip netns list - show all of the named network namespaces

ip netns add NAME - create a new named network namespace

ip [-all] netns delete [ NAME ] - delete the name of a network namespace(s)

ip [-all] netns exec [ NAME ] cmd ... - Run cmd in the named network namespace

ss：状态及统计数据查看

ss [options] [ FILTER ]

options

-t, --tcp Display TCP sockets.

-u, --udp Display UDP sockets.

-w, --raw Display RAW sockets.

-l, --listening Display only listening sockets (these are omitted by default).

-a, --all Display both listening and non-listening (for TCP this means established        connections) sockets.

-n, --numeric Do not try to resolve service names.

-e, --extended Show detailed socket information

-m, --memory Show socket memory usage.

-p, --processes Show process using socket.

-o, --options Show timer information.

FILTER := [ state STATE-FILTER ] [ EXPRESSION ]

示例

ss -o state established ‘( dport = :ssh or sport = :ssh )‘

Display all established ssh connections.

nm(Network Manager)家族（CentOS 7）

nmcli：命令行工具

nmcli  [ OPTIONS ] OBJECT { COMMAND | help }

 OBJECT := { general | networking | radio | connection | device | agent  }

   general - general NetworkManager status and operations

     COMMAND := { status | hostname | permissions | logging }

   networking - get or set general networking state of NetworkManager

     COMMAND := { [ on | off | connectivity ] }

   radio - get or set radio switch states

    COMMAND := { all | wifi | wwan | wimax }

   connection - start, stop, and manage network connections

    COMMAND := { show | up | down | add | edit | modify | delete | reload | load }

   device - show and manage network interfaces

    COMMAND := { status | show | connect | disconnect | delete | wifi | wimax }

修改属性

modify [--temporary] [ id | uuid | path ] <ID> [+|-]<setting>.<property> <value>

nmtui：text window 工具

Text User Interface for controlling NetworkManager

配置文件

IP/NETMASK/GW/DNS等属性的配置文件：/etc/sysconfig/network-scripts/ifcfg-IFACE

其可通过vim等文本编辑器直接修改

也可以使用专用的命令的进行修改

CentOS 6：system-config-network (setup)，

CentOS 7: nmtui

路由的相关配置文件：/etc/sysconfig/networkj-scripts/route-IFACE

支持两种配置方式，但不可混用；

(1) 每行一个路由条目：

TARGET  via  GW

(2) 每三行一个路由条目：

ADDRESS#=TARGET

NETMASK#=MASK

GATEWAY#=NEXTHOP

注：用虚拟机启用第二块儿网卡路由没有添加成功。。。。

本文出自 “liberalism” 博客，请务必保留此出处http://edonkey.blog.51cto.com/887243/1754034