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I'm having trouble installing libunrar.so. It's required for Calibre to convert CBR files.

Anyone an idea on where to get it (package or source)?

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4 Answers 4

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My PPA contains a libunrar package, if you don't feel like messing around with a manual install.

sudo apt-add-repository ppa:bodiltv/ppa
sudo apt-get update
sudo apt-get install calibre

(or just libunrar : sudo apt-get install libunrar)

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download calibre

http://sourceforge.net/projects/calibre/files/

select your system :

64 bits : calibre-x.x.xx-x86_64.tar.bz2

32 bits : calibre-x.x.xx-i686.tar.bz2

extract that file and find libunrar.so in the main directory

copy libunrar.so into "/usr/lib" folder

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    Put libunrar.so in /usr/local/lib, not in /usr/lib. Never touch anything under /usr outside /usr/local without going through the package manager. Also, run sudo ldconfig after you've installed a .so manually.
    – Gilles 'SO- stop being evil'
    Oct 17, 2010 at 17:52
  • @Gilles, i think is not necesary execute ldconfig in this case because only use (/lib and /usr/lib) man ldconfig and you are using /usr/local/lib
    – hhlp
    Oct 17, 2010 at 18:14
  • I have found it named unrar.so rather than libunrar.so by the way.
    – Ivan
    Sep 17, 2016 at 23:51
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Since Ubuntu 19.10 it is packaged in the repositories as libunrar5:

sudo apt install libunrar5

It will install the library as /usr/lib/x86_64-linux-gnu/libunrar.so.5, assuming a 64-bit Ubuntu. Since 20.04 there's no 32-bit (i386) version on repositories.

You could also download UnRAR source directly from the official RARLab website and easily build unrarlib.so from source:

wget 'https://www.rarlab.com/rar/unrarsrc-5.9.4.tar.gz'
tar -xf 'unrarsrc-5.9.4.tar.gz'
cd unrar
make lib

That will produce unrarlib.so in the newly created unrar directory. Now just move/copy/symlink it to /usr/local/lib and you're good to go!

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you can grab the libunrar.so file from the latest files here http://sourceforge.net/projects/calibre/files/ , make sure to get the right architecture for your system. i got calibre-0.7.23-x86_64.tar.bz2 myself because i have a 64-bit system.

you can then put that libunrar.so file in /usr/lib and hopefully it should work okay

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    Put libunrar.so in /usr/local/lib, not in /usr/lib. Never touch anything under /usr outside /usr/local without going through the package manager. Also, run sudo ldconfig after you've installed a .so manually.
    – Gilles 'SO- stop being evil'
    Oct 17, 2010 at 17:53

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