up vote 2 down vote favorite

I am not a very advanced user of Ubuntu. So the question may sound a bit naive.

I recently got a new laptop: HP Probook G3 440. I have tried installing many previous versions of Ubuntu. They run into a lot of driver issues. So I ended up downloading Ubuntu 16.04 since this is the only version that deals with the driver issues properly.

But I am facing difficulty installing important applications like "chromium browser" and "synaptic". Whenever I give the installation command/ "sudo apt-get update" in the terminal, it ends up saying "Hash Sum Mismatch" for many packages. I tried this solution. But it doesn't work. Terminal still returns the same message.

This is what I get when I run sudo apt-get update.

Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [93.3 kB]            
Get:2 http://us.archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Get:3 http://security.ubuntu.com/ubuntu xenial-security/main i386 Packages [46.4 kB]   
Get:4 http://security.ubuntu.com/ubuntu xenial-security/main Translation-en [17.9 kB]
Err:4 http://security.ubuntu.com/ubuntu xenial-security/main Translation-en
  Hash Sum mismatch
Get:5 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [94.5 kB]
Get:6 http://security.ubuntu.com/ubuntu xenial-security/main i386 DEP-11 Metadata [4,811 B]
Get:7 http://security.ubuntu.com/ubuntu xenial-security/main DEP-11 64x64 Icons [17.1 kB]
Get:8 http://security.ubuntu.com/ubuntu xenial-security/restricted i386 DEP-11 Metadata [157 B]
Get:9 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [82.2 kB]         
0% [9 InRelease gpgv 77.9 kB] [Connecting to us.archive.ubuntu.com (91.189.91.26)] [WaiSplitting up /var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_xenial-backporErr:9 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease                   
  Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)
Get:10 http://security.ubuntu.com/ubuntu xenial-security/universe i386 Packages [6,068 B]
Get:11 http://security.ubuntu.com/ubuntu xenial-security/universe Translation-en [5,212 B]
Get:12 http://security.ubuntu.com/ubuntu xenial-security/universe i386 DEP-11 Metadata [197 B]
Get:13 http://security.ubuntu.com/ubuntu xenial-security/multiverse i386 Packages [64 B]
Get:14 http://security.ubuntu.com/ubuntu xenial-security/multiverse Translation-en [64 B]
Get:15 http://security.ubuntu.com/ubuntu xenial-security/multiverse i386 DEP-11 Metadata [158 B]
Get:16 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages [1,196 kB]        
Err:16 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages                   
  Hash Sum mismatch
Get:17 http://us.archive.ubuntu.com/ubuntu xenial/main Translation-en [568 kB]         
Err:17 http://us.archive.ubuntu.com/ubuntu xenial/main Translation-en                  
  Hash Sum mismatch
Get:18 http://us.archive.ubuntu.com/ubuntu xenial/main i386 DEP-11 Metadata [733 kB]   
Get:19 http://us.archive.ubuntu.com/ubuntu xenial/main DEP-11 64x64 Icons [409 kB]     
Err:19 http://us.archive.ubuntu.com/ubuntu xenial/main DEP-11 64x64 Icons              
  Hash Sum mismatch
Get:20 http://us.archive.ubuntu.com/ubuntu xenial/restricted i386 Packages [8,684 B]   
Get:21 http://us.archive.ubuntu.com/ubuntu xenial/restricted Translation-en [2,908 B]  
Get:22 http://us.archive.ubuntu.com/ubuntu xenial/restricted i386 DEP-11 Metadata [185 B]
Get:23 http://us.archive.ubuntu.com/ubuntu xenial/universe i386 Packages [7,512 kB]    
Err:23 http://us.archive.ubuntu.com/ubuntu xenial/universe i386 Packages               
  Hash Sum mismatch
Get:24 http://us.archive.ubuntu.com/ubuntu xenial/universe Translation-en [4,354 kB]   
Err:24 http://us.archive.ubuntu.com/ubuntu xenial/universe Translation-en              
  Hash Sum mismatch
Get:25 http://us.archive.ubuntu.com/ubuntu xenial/universe i386 DEP-11 Metadata [3,407 kB]
Err:25 http://us.archive.ubuntu.com/ubuntu xenial/universe i386 DEP-11 Metadata        
  Hash Sum mismatch
Get:26 http://us.archive.ubuntu.com/ubuntu xenial/universe DEP-11 64x64 Icons [7,448 kB]
Get:27 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [62.2 kB] 
Err:27 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages           
  Hash Sum mismatch
Get:28 http://us.archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [25.9 kB]
Err:28 http://us.archive.ubuntu.com/ubuntu xenial-updates/main Translation-en          
  Hash Sum mismatch
Get:29 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 DEP-11 Metadata [18.6 kB]
Err:29 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 DEP-11 Metadata    
  Hash Sum mismatch
Get:30 http://us.archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [32.2 kB]
Get:31 http://us.archive.ubuntu.com/ubuntu xenial-updates/restricted i386 Packages [64 B]
Get:32 http://us.archive.ubuntu.com/ubuntu xenial-updates/restricted Translation-en [64 B]
Get:33 http://us.archive.ubuntu.com/ubuntu xenial-updates/restricted i386 DEP-11 Metadata [156 B]
Get:34 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [15.0 kB]
Get:35 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe Translation-en [11.7 kB]
Get:36 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe i386 DEP-11 Metadata [776 B]
Get:37 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe DEP-11 64x64 Icons [6,773 B]
Reading package lists... Done                                                          
E: GPG error: http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?
share|improve this question

closed as off-topic by David Foerster, Paranoid Panda, Eric Carvalho, Zanna, Sumeet Deshmukh Jun 30 '17 at 15:25

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This describes a problem that can't be reproduced that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers." – David Foerster, Paranoid Panda, Eric Carvalho, Sumeet Deshmukh
If this question can be reworded to fit the rules in the help center, please edit the question.
    
Just wait, and try running apt-get update regularly. It will go away eventually. If you urgently need to install some package, you can try to install it with apt-get install anyway, or manually download and install the DEB. – fkraiem May 11 '16 at 11:22
    
It has happened to me, and I have emailed the administrator of the mirror in question. He actually replied, confirming that at that exact time there was a complete reload of the mirror repositories. So yes, it will go away. – Jos May 11 '16 at 11:29
    
@fkraiem I cannot apt-get install. "Package 'synaptic' has no installation candidate" is what the terminal returns. But maybe .deb files are an option. Jos, What you are talking about seems like a temporary problem with the mirror. I hope it's the same with me. I will post here if I don't get a solution in a week or so I guess. I hope that's enough time for fixing this issue. – Labib666 May 11 '16 at 12:32
1  
@fkraiem unfortunately I had this issue for more than a week in Ubuntu 16.04 (basically, the whole time I had it). Maybe this has something to do with my laptop/internet connection/something else? – Labib666 May 11 '16 at 12:42
1  
@fkraiem Ah, I installed Kubuntu later on, here is what I got during "sudo apt-get update" update – Labib666 May 11 '16 at 16:57

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