Linux Network Properties Configuration

Linux Network Attribute Configuration sub-dynamic allocation and static designation

Dynamic allocation relies primarily on DHCP servers

static specifies that commands need to be manually assigned

Statically specified commands three family

Ifcfg Family

Iproute2 Family

NM Family

Ifcfg Family:

Ifconfig: interface and address viewing and management

Ifconfig-a Show all interfaces including inactive

Ifconfig Interface Up|down Switch port

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Ifconfig interface address netmask modifying port IP addresses

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Route: routing View and management

Route-n View host route entry as a digital representation

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Route add [-net|-host] target [netmask Nm] [GW GW] [[[Dev] If] Add route

Route del [-net|-host] target [GW GW] [netmask Nm] [[Dev] If] Delete route

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Add Delete default route

Route add default GW 192.168.10.1

Route del Default

Netstat: status and Statistics view

Netstat-rn is the same as route-n: Show routing

netstat [--tcp|-t] [--udp|-u] [--udplite|-u] [--sctp|-s] [--raw|-w] [--listening|-l] [--all|-a] [--numeric|-n] [-- EXTEND|-E[--EXTEND|-E] [--program|-p]

Common combinations:

-tan: Displays all tcpsockets in digital form

-uan: Displays all udpsockets in digital form

-TNL: Displays the monitor status in digital form Tcpsockets

-UNL: Displays the monitor status in digital form Udpsockets

-TUNLP: Digital display of listening status TCP, Udpsockets related processes and PID

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Netstat-i displaying all interface statistics

Netstat-iinterface displaying specified interface statistics

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Iproute2 Family:

IP [OPTIONS] OBJECT {COMMAND | help}

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

IP Link: Network device configuration

IP link set DEVICE {up | \}|multicast {ON | off} |name NEWNAME |mtu MTU |netns PID

IP link Show DEVICE

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IP route: Routing table Management

IP route {Add | del | show | flush | get}

Example:

# 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

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# IP Route Get 192.168.3.0/24

IP Address: Management of protocol addresses

IP Address {add | del} ifaddr dev STRING

IP Address {show | flush} [Dev STRING]

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IP netns: Network namespace management

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: Status and Statistics view

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 is 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]

Example

Ss-o State established ' (Dport =: ssh or sport =: SSH) '

Display all established SSH connections.

nm (Network Manager) Family (CentOS 7)

NMCLI: command-line tools

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}

modifying properties

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

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Nmtui:text Window Tool

Text User Interface for controlling NetworkManager

Configuration file

Config file for Ip/netmask/gw/dns properties:/etc/sysconfig/network-scripts/ifcfg-iface

It can be directly modified by a text editor such as Vim

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You can also use a dedicated command to modify

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

CentOS 7:nmtui

Related configuration file for routing:/etc/sysconfig/networkj-scripts/route-iface

Support two configuration methods, but not mixed;

(1) One route entry per line:

TARGET via GW

(2) One route entry per three lines:

Address#=target

Netmask#=mask

Gateway#=nexthop

Note: Using a virtual machine to enable the second block of NIC routing has not been added successfully ....

This article is from the "Liberalism" blog, make sure to keep this source http://edonkey.blog.51cto.com/887243/1754034

Linux Network Properties Configuration