Hash Sum mismatch error when trying to upgrade

Question

I am getting this error when trying to upgrade:

E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.157.15_all.deb  Hash Sum mismatch

To check what is wrong I downloaded the package from the address and checked the md5 which is showing something different in my machine from the one given on the website.

Solution

That generally means that the download was corrupted. Try the following to remove the downloaded file and retry the upgrade:

sudo apt-get clean
sudo apt-get upgrade

Comments

[Chetan]

tried :/ still same

[Chai T. Rex]

Are you behind a proxy server that might cache the downloads?

[Chetan]

nope, i am wondering why is that md5 sum is given on packages.ubuntu.com/xenial-updates/all/linux-firmware/downlo‌​ad ,if u try to manually download and check both are different

[Chetan]

here in my machine its 2a7001cd87df0e459eb7fe5b98c8f77e and on website its c144ae5a59948a989a4695de73f11eac

[sourav]

can you try with sudo apt-get autoremove sudo apt-get autoclean sudo apt-get update

[sourav]

then try sudo apt-get upgrade