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The test network tool tests the connectivity of the network on the command line

Show hostname

   hostname

Test network connectivity

   ping

Display the correct routing table

   ip route tracks rout

   traceroute

   tracepath

   mtr determines that the name server uses

   nslookup

   host

   digUbuntu Network configuration

Official website documentation:

Https://help.ubuntu.com/lts/serverguide/network-configuration.html.zh-CN

Configure automatic acquisition of IP

Cat / etc/netplan/01-netcfg.yaml

Network:

  version: 2

  renderer: networkd

  ethernets:

    ens33:

  dhcp4: yes

After modifying the Nic configuration file, you need to execute the command to take effect: netplan apply configuration static IP:

Cat / etc/netplan/01-netcfg.yaml

Network:

   version: 2

   renderer: networkd

   ethernets:

  eth0:

     addresses:

 -192.168.6.10 Universe 24

    -10.10.10.10 Compact 24

    gateway4: 192.168.6.1

    nameservers:

     search: [mydomain, otherdomain]

     addresses: [223.5.5.5, 8.8.8.8, 1.1.1.1]

View ip and gateway

Ip addr

Route-n

Check out DNSls-l / etc/resolv.conf

Lrwxrwxrwx 1 root root 39 Dec 12 11:36 / etc/resolv.conf

\ >.. / run/systemd/resolve/stub-resolv.confsystemd-resolve-- status modifies the host name

Hostnamectl set-hostname ubuntu1904

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