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I had Unity 5.3.4f1 installed, but I wanted to upgrade to the latest version which is 2017.2.0f3 so I downloaded the .deb file from here then I tried to install it so I typed: 

sudo dpkg -i unity-editor_amd64-2017.2.0f3.deb

which produced the following output after some time:

(Reading database ... 294886 files and directories currently installed.)
Preparing to unpack unity-editor_amd64-2017.2.0f3.deb ...
Unpacking unity-editor (2017.2.0f3) over (5.3.4f1) ...
dpkg-deb (subprocess): cannot copy archive member from 'unity-editor_amd64-2017.2.0f3.deb' to decompressor pipe: unexpected end of file or stream
dpkg-deb: error: subprocess paste returned error exit status 2
dpkg: error processing archive unity-editor_amd64-2017.2.0f3.deb (--install):
 cannot copy extracted data for './opt/Unity/Editor/Data/PlaybackEngines/AndroidPlayer/Tools/gradle/lib/jaxen-1.1.jar' to '/opt/Unity/Editor/Data/PlaybackEngines/AndroidPlayer/Tools/gradle/lib/jaxen-1.1.jar.dpkg-new': unexpected end of file or stream
Errors were encountered while processing:
 unity-editor_amd64-2017.2.0f3.deb

Why is it and how can I fix it?

Videonauth
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xuwenbuwer
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1 Answers1

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Simply remove Unity folder from /opt/ and use gdebi to install the new version, which has proven far better than using dpkg and worrying about the dependencies. So simply do:

sudo rm -r /opt/Unity/
sudo apt update
sudo apt install gdebi
sudo gdebi unity-editor_amd64-2017.2.0f3.deb
Videonauth
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  • I tried sudo gdebi unity-editor_amd64-2017.2.0f3.deb ,but it said: Reading package lists... Done Building dependency tree Reading state information... Done Failed to open the software package The package might be corrupted or you are not allowed to open the file. Check the permissions of the file. – xuwenbuwer Dec 01 '17 at 18:30
  • But did you remove the Unity directory in `/opt/`? – Videonauth Dec 01 '17 at 18:31
  • O.k. whats the output of `ls -l unity-editor_amd64-2017.2.0f3.deb` ? Might that the downloaded file is corrupted. – Videonauth Dec 01 '17 at 18:32
  • I did but luckly everything is solved now. Something renamed the extention of the .deb file I downloaded to .deb1 so I installed that one(the .deb1) and it is unpacking now. :-) – xuwenbuwer Dec 01 '17 at 18:35