sudo apt-get update
Hit:1 http://in.archive.ubuntu.com/ubuntu xenial InRelease                     
Hit:2 http://security.ubuntu.com/ubuntu xenial-security InRelease       
Get:3 http://in.archive.ubuntu.com/ubuntu xenial-updates InRelease [95.7 kB]
Hit:4 http://in.archive.ubuntu.com/ubuntu xenial-backports InRelease
Get:5 http://in.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [290 kB]
Err:5 http://in.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages
  Hash Sum mismatch
Fetched 386 kB in 4s (77.4 kB/s)  
Reading package lists... Done
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/xenial-updates/universe/binary-i386/by-hash/SHA256/a5f6e2c8c5aaf6075a177d5cd32a6a874fefbe64d2cd7c9974c4211bdae77db2  Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead.