Brotli is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression. It is open-sourced under the MIT License. You can browse its source code on Github. The specification of the Brotli Compressed Data Format is defined in RFC 7932.

7z a /tmp/secure.7z /tmp/test.txt -pMonp@ssword
7z x /tmp/securez.7z

wget http://www.rarlab.com/rar/rarlinux-x64-5.5.b4.tar.gz
tar xvf rarlinux-x64-5.5.b4.tar.gz
cd rar/
make

On peut compléter avec :

ln -s /usr/local/bin/rar /usr/bin/rar
ln -s /usr/local/bin/unrar /usr/bin/unrar

7zip prend enfin en charge les rar5.