Shulou(Shulou.com)06/01 Report--

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

DEVICE: this option is required for the device to which this profile is applied and needs to be configured correctly.

HWADDR: the MAC address of the corresponding device, which must match the mac address of the relevant network card. The default does not need to be modified.

BOOTPROTO: the address configuration protocol used to activate this device, and the common options that must be configured for dhcp, static, none, and bootp;.

ONBOOT: the option that must be configured to activate this device when the system boots.

TYPE: interface type; common Ethernet, options that Bridge; must configure

NM_CONTROLLED:NM is the abbreviation of NetworkManager; whether this Nic is controlled by NM; CentOS6 is recommended as "no"

UUID: unique identification of the device

IPADDR: indicates the IP address

NETMASK: subnet mask

GATEWAY: default gateway

DNS1: the first DNS server points to

DNS2: the second DNS server points to

USERCTL: whether the average user can control this device

PEERDNS: if the value of BOOTPROTO is "dhcp", whether to use the DNS of dhcp

The following is a reference network card configuration

[root@test-3 ~] # cat / etc/sysconfig/network-scripts/ifcfg-eth0DEVICE=eth0BOOTPROTO=dhcpHWADDR=00:0c:29:4e:f0:1aIPV6INIT=noNM_CONTROLLED=yesONBOOT=yesTYPE=EthernetUSERCTL=noPEERDNS=yes

Linux routing profile: / etc/sysconfig/network-scripts/route-xxx

1. Segment via Gateway

192.168.0.0/24 via 192.168.0.1

192.168.1.0/24 via 192.168.0.1

two。 Define a route every 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 tool

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 Nic

Ip addr displays all network hardware information

Ip addr add IP/MASK dev interface string network card configuration information

For example, ip addr add 192.168.0.0 Universe 24 dev eth2

Ip route show displays routing information

Ip route add IP/MASK via GW dev interface

For example, ip route add 192.168.0.0 dev eth0 24 via 192.168.0.1

For example, 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 displays all network hardware information

Ifconfig inferface up | down switch Nic

Ifconfig interface [aftype] options | address...

Ifconfig interface IP/MASK

For example, ifconfig eth0 10.0.0.1 Compact 24

Ifconfig interface IP netmask MASK

For example, ifconfig eth0 10.0.0.1 netmask 255.255.255.0

3.route

Route-n displays host routing information

Route add [- net |-host] target [netmask Nm] [gw Gw] [[dev] If] add routes

Destination: 192.168.1.3 Gateway: 172.16.0.1

Route add-host 192.168.1.3 gw 172.16.0.1 dev eth0

Destination: 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 gw 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 a route

Destination: 192.168.1.3 Gateway: 172.16.0.1

Route del-host 192.168.1.3

Destination: 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

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