root@atr-G41D3C:/# apt-get install cpio
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  libarchive1
The following NEW packages will be installed:
  cpio
0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
Need to get 86.0 kB of archives.
After this operation, 377 kB of additional disk space will be used.
Err:1 http://archive.ubuntu.com/ubuntu focal/main amd64 cpio amd64 2.13+dfsg-2
  Temporary failure resolving 'archive.ubuntu.com'
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/c/cpio/cpio_2.13+dfsg-2_amd64.deb  Temporary failure resolving 'archive.ubuntu.com'
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
root@atr-G41D3C:/#