mladen@pureos:~/Downloads$ atool -l ojsa.rar 
Can't exec "rar": No such file or directory at /usr/bin/atool line 1869.
rar: cannot execute - No such file or directory
atool: rar ...: non-zero return-code

mladen@pureos:~/Downloads$ atool -x ojsa.rar
Can't exec "rar": No such file or directory at /usr/bin/atool line 1869.
rar: cannot execute - No such file or directory
atool: rar ...: non-zero return-code

mladen@pureos:~/Downloads$ man atool | grep rar
       multiple  files  in their root directories. The aunpack program overcomes this problem by first extracting files to a unique (temporary) directory, and
       arepack repacks archives to a different format. It does this by first extracting all files of the old archive into a temporary directory, then  packing
       rar (.rar)
       use_rar_for_unpack (default: 0)
              Enable  this if you want to always use rar instead of unrar when possible. This makes atool use the rar command (path_rar) even when listing and
              atool extracts to a temporary directory created in the current directory so that no files are overwritten. This  variable  controlls  what  name
              that temporary directory should have.
              When using pbzip2, and creating archives, a temporary file need to be created. This option controls the name of that file.  See tmpdir_name  for
       path_rar (default: rar)
       path_unrar (default: unrar)
       To list contents of the rar archive `stuff.rar':
            als stuff.rar