Ubuntu 18.04 sever without network after move SSD from PC1 to PC2

I tested on Ubuntu 18.04 desktop it is OK. But I tested Ubuntu 18.04 server or 20.04 server , I move SSD from PC1 to PC2 then PC2 without network, without too from Hyper-V to PC1 (by dd & balena etcher) I wanna distribution to many PC without monitor (coin mining), It need auto command in bash file to fix this error. Help me, please! I'm not found in similar questions.

PS:

cmd ip a result:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: enp3s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether f0:79:59:6a:6f:88 brd ff:ff:ff:ff:ff:ff

cmd ip r result: empty string ('')

cmd cat /etc/netplan/*.yaml result:

# This is the network config written by 'subiquity'
network: ethernets: eth0: dhcp4: true version: 2

2 Answers

Please notice that the relevant ethernet interface is enp3s0; however, the netplan file refers to eth0. Please edit your netplan yaml file to replace eth0 with enp3s0. Follow with:

sudo netplan generate
sudo netplan apply

Is there any improvement?

Thankyou chili555. I success fix this error, below is file bash auto fix:

#!/usr/bin/env bash eth0=`ip a | grep "state DOWN" | cut -d ' ' -f 2 | cut -d ':' -f 1` if [[ ! -z "$eth0" ]] ; then echo "Internet isn't present" filelist=(/etc/netplan/*.yaml) for ((i0=0; i0 < ${#filelist[@]}; i0++)); do #echo changing file: ${filelist[$i0]} eth1=`cat ${filelist[$i0]} | grep ' ' | cut -d ' ' -f 5 | cut -d ':' -f 1` #echo eth1 = $eth1, eth0 = $eth0 sed -i "s/$eth1/$eth0/g" ${filelist[$i0]} done sudo netplan generate sudo netplan apply else echo "Internet is present" fi