Network management of Linux

Linux NIC configuration file:/etc/sysconfig/network-scripts/ifcf-xxx

Device: Which of the devices this profile applies to, this option is a required parameter and needs to be configured correctly.

HWADDR: The MAC address of the corresponding device must match the MAC address of the relevant NIC. The default is not modified.

Bootproto: The address configuration protocol used when activating this device, common DHCP, static, none, BOOTP, options that must be configured.

onboot: The option that must be configured if this device is activated at system boot time.

Type: interface types; common Ethernet, Bridge; options that must be configured

NM_CONTROLLED:NM is a shorthand for NetworkManager; the NIC accepts NM control; CentOS6 is recommended as "no"

UUID: The unique identification of the device;

IPADDR: Specify the IP address;

NETMASK: Subnet mask;

Gateway: Default gateways;

DNS1: The first DNS server points to;

DNS2: The second DNS server points to;

Userctl: Whether the ordinary user can control the device;

Peerdns: If the value of Bootproto is "DHCP", whether to use DHCP DNS

Here is a reference NIC configuration

[Email protected] ~]# cat/etc/sysconfig/network-scripts/ifcfg-eth0device=eth0bootproto=dhcphwaddr=00:0c:29:4e:f0 : 1aipv6init=nonm_controlled=yesonboot=yestype=ethernetuserctl=nopeerdns=yes

Linux routing configuration file:/etc/sysconfig/network-scripts/route-xxx

1. Network segment via Gateway

192.168.0.0/24 via 192.168.0.1

192.168.1.0/24 via 192.168.0.1

2. Define one route per three lines

Address#=target

Netmask#=mask

Gateway#=gw

address1=192.168.0.0

netmask1=255.255.255.0

gateway1=192.168.0.1

Command line network management tools

1.ip

IP [OPTIONS] OBJECT {COMMAND | help} #OBJECT can be {link | addr | route}

IP link Show displays all network hardware information

IP link Set Dev interface up|down switch card

IP addr Display all network hardware information

IP addr Add ip/mask Dev interface string NIC configuration information

Such as IP addr add 192.168.0.0/24 dev eth1

IP route show shows routing information

IP route add ip/mask via GW Dev interface

such as IP route add 192.168.0.0/24 via 192.168.0.1 dev eth0

If you add a default gateway: IP route add default via 172.16.0.1 dev eth0

IP route add ip/mask dev IFACE string src source_ip

2.ifconfig

Ifconfig [Interface]

Ifconfig-a displaying all network hardware information

Ifconfig inferface up|down Switch card

Ifconfig interface [Aftype] options | Address ...

Ifconfig interface Ip/mask

such as ifconfig eth0 10.0.0.1/24

ifconfig interface IP netmask MASK

such as ifconfig eth0 10.0.0.1 netmask 255.255.255.0

3.route

ROUTE-N Display Host Routing information

route add [-net|-host] target [netmask Nm] [GW GW] [[Dev] If] Add route
Target: 192.168.1.3 Gateway: 172.16.0.1

Route add-host 192.168.1.3 GW 172.16.0.1 Dev eth0

Target: 192.168.0.0 Gateway: 172.16.0.1

Route add-net 192.168.0.0 netmask 255.255.255.0 gw 172.16.0.1 Dev eth0

Route add-net 192.168.0.0/24 GW 172.16.0.1 Dev eth0

Default route, Gateway: 172.16.0.1

Route add-net 0.0.0.0 netmask 0.0.0.0 GW 172.16.0.1

route add default GW 172.16.0.1

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

Target: 192.168.1.3 Gateway: 172.16.0.1

Route Del-host 192.168.1.3

Target: 192.168.0.0 Gateway: 172.16.0.1

Route del-net 192.168.0.0 netmask 255.255.255.0

NMCLI [OPTIONS] OBJECT {COMMAND | help}

Device-show and manage network interfaces

Connection-start, stop, and manage network connections

NMCLI connection Modify IFACE [+|-]setting.property value

Setting.property:

Ipv4.addresses

Ipv4.gateway

Ipv4.dns1

Ipv4.method

Manual

Network management of Linux