Get Unrar Nonfree on Raspbian for the Raspberry PI

install-unrar-nonfree-raspbian.sh

# As per this guide -- http://raspberrypi.stackexchange.com/questions/3617/how-to-install-unrar-nonfree#3618

# Uninstall unrar-free.
sudo apt-get remove unrar-free

# Make sure you have a source repository by editing /etc/apt/sources.list.
cat /etc/apt/sources.list

# Sync the apt database.
sudo apt-get update

# Create a working directory and move into it. The unrar-nonfree command will be built in this directory.
mkdir ~/unrar-nonfree && cd ~/unrar-nonfree

# Install the dependencies required by unrar-nonfree.

sudo apt-get build-dep unrar-nonfree

# Download the unrar-nonfree sources and build the .deb package.
sudo apt-get source -b unrar-nonfree

# Install the generated .deb package. Its name varies depending on the version of unrar-nonfree.
sudo dpkg -i unrar*.deb

# You can remove the working directory you created in 4..
cd && rm -r ~/unrar-nonfree

# Once installed, you can use either unrar or unrar-nonfree (unrar is a simlink to unrar-nonfree).

# with unrar-free
# unrar -x my_archive.part01.rar

# with unrar-nonfree
# unrar e my_archive.part01.rar

# Please man unrar-nonfree for more details.

I think line 26 should be changed to cd && sudo rm -r ~/unrar-nonfree

For this to work, I had to uncomment this line in my /etc/apt/sources.list:

deb-src http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi

### Tested on pi4 arm64
sudo apt-get remove unrar-free;cd /tmp/;sudo echo 'deb-src http://deb.debian.org/debian buster main contrib non-free'>> /etc/apt/sources.list;sudo apt-get update;sudo apt-get build-dep unrar-nonfree;sudo apt-get source -b unrar-nonfree;sudo dpkg -i unrar*.deb; echo 'done'
I like to add an alias to do it recursively

alias unrardir='/usr/bin/unrar-nonfree e -r *.rar'

I also chmod 777 the bin so torrent applicatiosn can use it (This is technically insecure but it does the job)

sudo chmod 777 /usr/bin/unrar-nonfree