Ubuntu Issues need help

[Liam]

Hi all,
Hope you are well, I have been having a few issues with my ubuntu server, I
am unable to install any packages when I run
# sudo apt-get update
it presents me with the following error:
E: Some index files failed to download, they have been ignored, or old ones
used instead.
I tried
# sudo apt-get clean
then
# sudo apt-get update and get the same error
I also get  a dpkg error before when try and onstall an application:
E: Sub-process /usr/bin/dpkg returned an error code (1)
I run
# sudo sed -i '1 s/sh -e/sh/' /var/lib/dpkg/info/locales.postinst
and its still does not run, I have even tried:
# sudo apt-get -f install
# sudo apt-get -f update
# sudo apt-get -f upgrade
and nothing
# sudo apt-get install --fix-missing
# sudo apt-get update --fix-missing
# sudo apt-get upgrade --fix-missing

can anyone help
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