apt-cache policy libc6:amd64

root@Microknoppix:/home/knoppix#  
root@Microknoppix:/home/knoppix# apt-cache policy libc6:amd64
libc6:amd64:
 Installed: (none)
 Candidate: 2.28-10+deb10u4
 Version table:
    2.28-10+deb10u4 500
       500 http://archive.debian.org/debian-security buster/updates/main amd64 Packages
    2.28-10+deb10u1 500
       500 http://archive.debian.org/debian buster/main amd64 Packages

root@Microknoppix:/home/knoppix#  
root@Microknoppix:/home/knoppix#  
root@Microknoppix:/home/knoppix#