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

1. Basic knowledge of network

If a host can connect to the public network, such as accessing www.baidu.com

Then this mainframe is bound to have

Ipaddress

GATEWAY

Dns

# ipaddress#

Tcp/ip

Ipv4

2-ary 32 bit

254.254.254.254/255.255.255.0

11111110.11111110.11111110.11111110/11111111.11111111.11111111.00000000

254.254.0.254/255.255.255.0

254.254.0.254/255.255.0.0

# ip settings #

Ifconfig # tools for viewing or temporarily configuring host ip

Ifconfig Network Interface # # View the ip on this interface

Ifconfig network interface ip netmask subnet mask # temporarily set ip

Ifconfig eth0 172.25.254.100 netmask 255.255.255.0

Systemctl restart network # restart basic network services

Systemctl restart NetworkManager # Network Intelligent Management Service

Graphical network configuration mode

Network Settings tool in nm-connection-editor # # drawing

Network configuration tools in nmtui # # text

How the command sets the ip

Nmcli

Nmcli connection delete connection name # Delete this connection

Nmcli connection add con-name westos ifname eth0 type ethernet autoconnect yes # add dynamic network

Nmcli connection add con-name westos ifname eth0 type ethernet ip4 ip/24 # static network

Network profile

/ etc/sysconfig/network-scripts/ # Network configuration directory

# dynamic network configuration #

Vim ifcfg-xxx # Network configuration file format

DEVICE=eth0 # # specify the device name for file management

BOOTPROTO=dhcp # # dhcp dynamic acquisition. Both none and static represent static network.

ONBOOT=yes # # Boot automatic Activation device

NAME=hello # # specifies that the name of the web link is hello

# static network configuration #

Vim ifcfg-xxx # Network configuration file format

DEVICE=eth0 # # specify the device name for file management

BOOTPROTO=static | none # # dhcp dynamic acquisition. Both none and static represent static network.

ONBOOT=yes # # Boot automatic Activation device

NAME=hello # # specify the link name

IPADDR=172.25.254.100 # # set ip to 172.25.254.100

NETMASK=255.255.255.0 # # subnet mask is 255.255.255.0

PREFIX=24 # # subnet mask is 255.255.255.0

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