Solution to Error E: Package 'unrar' has no installation candidate when installing rar/unrar on Ubuntu

Background: Ubuntu 16.04

When installing rar/unrar, the following error occurs:

 sudo apt-get install unrarReading package lists... DoneBuilding dependency tree       Reading state information... DonePackage unrar is not available, but is referred to by another package.This may mean that the package is missing, has been obsoleted, oris only available from another source E: Package 'unrar' has no installation candidate

Solution:

1.  Open https://www.rarlab.com/download.htm

2.  Download RAR 5.71 beta 2 for Linux (choose 32-bit or 64-bit based on your system)

How to determine if your system is 32-bit or 64-bit:

root# getconf LONG_BIT64  # 64-bit system

Installation:

tar -xzpvf rarlinux-x64-5.7.1b2.tar.gz cd rar make

Running make will output:

root:/home/work/rar# makemkdir -p /usr/local/binmkdir -p /usr/local/libcp rar unrar /usr/local/bincp rarfiles.lst /etccp default.sfx /usr/local/lib