cant upgrade by sudo apt- get upgrade, hash sum mismatch, ubuntu 16.04, problem upgrading firefox
4853
Trouble downloading packages list due to a "Hash sum mismatch" error
145263
“Hash sum mismatch” error due to identical SHA1 and MD5 but different SHA256
140893
Error when using apt-get update
151605
upgrading from 15.10 to 16.04 apt not installed
127895
403 Forbidden error in sudo apt-get upgrade ubuntu 17.4
116445
"Can't check signature: public key not found" while upgrading, why?
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
65099
Unable to install any updates through update manager/apt-get upgrade
72152
Upgrading 16.04 to 16.04.1
157289
Why use apt-get upgrade instead of apt-get dist-upgrade?
17645
Unable to upgrade pip
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
47843
Upgraded to Chrome 61.0.3163 via ppa on Ubuntu 16.04 but it won't launch because NSS out of date
93246
How to resolve conflicting distributions in apt-get
86777
Distribution upgrade problem "No new release found"
35146
Will apt-get dist-upgrade upgrade my system to newer version?
67218
update OSX Yosemite & cksum mismatch