superman@k8s-master:~$ sudo apt install net-tools
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following NEW packages will be installed:
  net-tools
0 upgraded, 1 newly installed, 0 to remove and 14 not upgraded.
Need to get 204 kB of archives.
After this operation, 819 kB of additional disk space will be used.
Get:1 http://cn.archive.ubuntu.com/ubuntu jammy/main amd64 net-tools amd64 1.60+git20181103.0eebece-1ubuntu5 [204 kB]
Fetched 204 kB in 1s (256 kB/s)   
Selecting previously unselected package net-tools.
(Reading database ... 74796 files and directories currently installed.)
Preparing to unpack .../net-tools_1.60+git20181103.0eebece-1ubuntu5_amd64.deb ...
Unpacking net-tools (1.60+git20181103.0eebece-1ubuntu5) ...
Setting up net-tools (1.60+git20181103.0eebece-1ubuntu5) ...
Processing triggers for man-db (2.10.2-1) ...
Scanning processes...                                                                                                      
Scanning linux images...                                                                                                   

Running kernel seems to be up-to-date.

No services need to be restarted.

No containers need to be restarted.

No user sessions are running outdated binaries.

No VM guests are running outdated hypervisor (qemu) binaries on this host.
superman@k8s-master:~$ 

superman@k8s-master:~$ cd /etc/netplan/
superman@k8s-master:/etc/netplan$ 
superman@k8s-master:/etc/netplan$ ls
50-cloud-init.yaml
superman@k8s-master:/etc/netplan$

superman@k8s-master:/etc/netplan$ sudo mv 50-cloud-init.yaml 50-cloud-init.yaml.bak
[sudo] password for superman: 
superman@k8s-master:/etc/netplan$ 

superman@k8s-master:/etc/netplan$ ifconfig 
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.129  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::20c:29ff:fe1b:4d1  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:1b:04:d1  txqueuelen 1000  (Ethernet)
        RX packets 2089  bytes 732805 (732.8 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1371  bytes 248989 (248.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 200  bytes 16264 (16.2 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 200  bytes 16264 (16.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

superman@k8s-master:/etc/netplan$

superman@k8s-master:/etc/netplan$ sudo vim 01-netcfg.yaml

network:
  version: 2
  renderer: networkd
  ethernets:
    ens33:
      dhcp4: no
      addresses:
        - 192.168.1.131/24
      gateway4: 192.168.1.1
      nameservers:
        addresses: [202.102.224.68,202.102.227.68]

superman@k8s-master:/etc/netplan$ sudo netplan apply

** (generate:2340): WARNING **: 11:02:18.289: Permissions for /etc/netplan/01-netcfg.yaml are too open. Netplan configuration should NOT be accessible by others.

** (generate:2340): WARNING **: 11:02:18.289: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.
WARNING:root:Cannot call Open vSwitch: ovsdb-server.service is not running.

** (process:2338): WARNING **: 11:02:18.709: Permissions for /etc/netplan/01-netcfg.yaml are too open. Netplan configuration should NOT be accessible by others.

** (process:2338): WARNING **: 11:02:18.709: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.

** (process:2338): WARNING **: 11:02:19.022: Permissions for /etc/netplan/01-netcfg.yaml are too open. Netplan configuration should NOT be accessible by others.

** (process:2338): WARNING **: 11:02:19.022: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.

** (process:2338): WARNING **: 11:02:19.022: Permissions for /etc/netplan/01-netcfg.yaml are too open. Netplan configuration should NOT be accessible by others.

** (process:2338): WARNING **: 11:02:19.022: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.
superman@k8s-master:/etc/netplan$ 
superman@k8s-master:/etc/netplan$ ifconfig -a
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.131  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::20c:29ff:fe1b:4d1  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:1b:04:d1  txqueuelen 1000  (Ethernet)
        RX packets 6208  bytes 1186753 (1.1 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4710  bytes 932202 (932.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 200  bytes 16264 (16.2 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 200  bytes 16264 (16.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

superman@k8s-master:~$