I am following https://www.digitalocean.com/community/tutorials/how-to-set-up-a-node-js-application-for-production-on-ubuntu-16-04 link to deploy my node application to digital ocean.
But when I am trying to install node using curl I am getting the following exception,

E: Failed to fetch http://sgp1.mirrors.digitalocean.com/ubuntu/dists/xenial-updates/main/binary-amd64/Packages.xz Hash Sum mismatch
E: Failed to fetch http://sgp1.mirrors.digitalocean.com/ubuntu/dists/xenial-updates/universe/binary-amd64/Packages.xz 404 Not Found [IP: 80]
E: Failed to fetch http://sgp1.mirrors.digitalocean.com/ubuntu/dists/xenial-updates/universe/i18n/Translation-en.xz 404 Not Found [IP: 80]
E: Failed to fetch http://sgp1.mirrors.digitalocean.com/ubuntu/dists/xenial-updates/multiverse/binary-amd64/Packages.xz 404 Not Found [IP: 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
Error executing command, exiting.

I connected the server using ubuntu’s console with authentication and also using ssh, but this problem is still persisting.

Also tried removing var/lists directory and then tried to install node using apt-get but the didn’t succeeded.

Also can you please give me some link to deploy bitbucket repository on digital ocean ?

Thanks in advance.

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Usually, a 404 error means that your package index list is outdated. Run sudo apt-get update to refresh the index and download the latest info from your repositories. Then, you should be able to re-run the apt-get install ... command that failed.