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I recently migrated from Ubuntu 12.04LTS to 14.04 LTS .I had issues with my 12.04 so I did a factory restore and then upgraded to 14.04.My system is upgraded to 14.04 with no issues but The first thing I see is after restarting a pop up comes system problem detected.If I cancel it I don't see any issues,however the real problem is when I try to install nodejs using the below link---

curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -

then I see some weird erros---------

Fetched 23.7 MB in 23s (1,028 kB/s)                                            
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/main/source/Sources  Hash Sum mismatch
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/main/binary-amd64/Packages  Hash Sum mismatch
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/main/binary-i386/Packages  Hash Sum mismatch
E: Some index files failed to download. They have been ignored, or old ones used instead.

I did try with below solution sudo rm -vf /var/lib/apt/lists/* but it again gives this error rm: cannot remove ‘/var/lib/apt/lists/partial’: Is a directory

Please help me on this as I am struggling with this.

David Foerster
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Sachin Chandra
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  • First make sure you have backed up all personal files that you cannot afford to lose. Then I would suggest that (instead of making a factory restore of 12.04 LTS and upgrading it to 14.04 LTS) you should install 14.04 LTS or 16.04 LTS or 18.04 LTS directly, the newer the better, as long as it works with your computer hardware. After the installation you can copy your personal files into the new system and install whatever program packages that you need. This is often the easiest and fastest way. – sudodus May 30 '18 at 03:30
  • I have a back up of all my folders and personal files.So as you said to try directly installing 14.04 LTS or 16.04 LTS. I will try with that. – Sachin Chandra May 30 '18 at 05:03
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    After doing a full installation of 18.04 LTS directly by getting an ISO image and installing it, worked.My system is up and running.Thanks a lot for the suggestion.It really helped .But only thing it is not able to detect an external hard disc.Do I need to install any driver for this. – Sachin Chandra Jun 01 '18 at 15:59
  • Congratulations to a successful installation :-) Please create another question about detecting the external hard disk drive. Describe as much as possible about the external drive, particularly what file systems there are, and if (and how) it was detected by the old system (12.04 LTS). – sudodus Jun 01 '18 at 18:04
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    Seems like it got detected in another USB port but not on another one on the same machine. – Sachin Chandra Jun 19 '18 at 01:53

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