Voici ce que j'obtiens lorsque je sudo apt update
Hit:1 http://archive.canonical.com/ubuntu xenial InRelease
Ign:2 http://dl.google.com/linux/chrome/deb stable InRelease
Get:3 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Hit:4 http://dl.google.com/linux/chrome/deb stable Release
Hit:5 http://ppa.launchpad.net/gnome3-team/gnome3-staging/ubuntu xenial InRelease
Hit:6 http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu xenial InRelease
Hit:7 http://eg.archive.ubuntu.com/ubuntu xenial InRelease
Hit:8 http://ppa.launchpad.net/linrunner/tlp/ubuntu xenial InRelease
Get:9 http://eg.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]
Hit:10 http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu xenial InRelease
Hit:12 http://ppa.launchpad.net/openjdk-r/ppa/ubuntu xenial InRelease
Hit:13 http://ppa.launchpad.net/plushuang-tw/uget-stable/ubuntu xenial InRelease
Hit:14 http://ppa.launchpad.net/ubuntu-desktop/gnome-software/ubuntu xenial InRelease
Get:15 http://eg.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]
Hit:16 http://ppa.launchpad.net/ubuntu-desktop/ubuntu-make/ubuntu xenial InRelease
Hit:17 http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu xenial InRelease
Hit:18 https://packages.microsoft.com/ubuntu/16.04/mssql-server xenial InRelease
Get:19 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [540 kB]
Err:19 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
Hash Sum mismatch
Get:21 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [218 kB]
Get:22 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [298 kB]
Get:23 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [193 kB]
Get:24 http://eg.archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [7,776 B]
Get:25 http://eg.archive.ubuntu.com/ubuntu xenial-updates/restricted i386 Packages [7,792 B]
Get:26 http://eg.archive.ubuntu.com/ubuntu xenial-updates/restricted Translation-en [2,548 B]
Get:27 http://eg.archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 DEP-11 Metadata [157 B]
Get:28 http://eg.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [468 kB]
Get:29 http://eg.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [453 kB]
Fetched 847 kB in 6s (121 kB/s)
Reading package lists... Done
E: Failed to fetch http://eg.archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-amd64/by-hash/SHA256/7ce67f72031f7cd7c4f24fffe8c90101935c8ae4e58502b1b60dfbb900f58841 Hash Sum mismatch
E: Failed to fetch http://eg.archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-i386/by-hash/SHA256/b4989c055e8da5afab24c96f86caf7157df19e46797e1217ad03a87d1b4a705a
E: Some index files failed to download. They have been ignored, or old ones used instead.J'ai essayé de nombreuses solutions pour un problème similaire, mais rien n'a fonctionné pour moi :( Aidez-moi s'il vous plaît !
Edit : Solutions que j'ai trouvées dans Google et qui n'ont pas fonctionné pour moi :
