Unable to install after apt-get update is executed

I have run the below command after the ap-get update command is run , but it gives output as unable to locate package

root@pingtest-6bcdfcdc5b-8h84v:/# apt-get install iputils-ping curl dnsutils iproute-2 y

Reading package lists… Done

Building dependency tree

Reading state information… Done

E: Unable to locate package iproute-2

E: Unable to locate package y