& ldquo; [: Двоичный: неожиданный оператор & rdquo; при обновлении определений rkhunter на 15.10

После обновления до Ubuntu GNOME 15.10 от 15.04 я заметил, что при запуске команды:

sudo rkhunter --update

Я получаю этот вывод:

[ Rootkit Hunter version 1.4.2 ]

Checking rkhunter data files...
  Checking file mirrors.dat                                  [ No update ]
  Checking file programs_bad.dat                             [ No update ]
  Checking file backdoorports.dat                            [ No update ]
  Checking file suspscan.dat                                 [ No update ]
  Checking file i18n/cn                                      [ No update ]
  Checking file i18n/de                                      [ No update ]
  Checking file i18n/en                                      [ No update ]
/usr/bin/rkhunter: 7439: [: Binary: unexpected operator
  Checking file i18n/tr                                      [ No update ]
  Checking file i18n/tr.utf8                                 [ No update ]
/usr/bin/rkhunter: 7439: [: Binary: unexpected operator
  Checking file i18n/zh                                      [ No update ]
  Checking file i18n/zh.utf8                                 [ No update ]

Это актуально раздел файла журнала:

[20:47:33] Checking rkhunter data files...
[20:47:33] Info: Created temporary file '/var/lib/rkhunter/tmp/rkhunter.upd.80Dxz4681c'
[20:47:33] Info: Created temporary file '/var/lib/rkhunter/tmp/mirrors.dat.TQulAoe7Ji'
[20:47:33] Info: The mirrors file has been rotated: /var/lib/rkhunter/db/mirrors.dat
[20:47:33] Info: Executing download command '/usr/bin/wget  -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.80Dxz4681c" http://rkhunter.sourceforge.net/1.3/mirrors.dat 2>/dev/null'
[20:47:33] Info: This version  : 2007060601
[20:47:34] Info: Latest version: 2007060601
[20:47:34] Checking file mirrors.dat                         [ No update ]
[20:47:34] Info: Executing download command '/usr/bin/wget  -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.80Dxz4681c" http://rkhunter.sourceforge.net/1.3/programs_bad.dat 2>/dev/null'
[20:47:34] Info: This version  : 2014042901
[20:47:34] Info: Latest version: 2014042901
[20:47:34] Checking file programs_bad.dat                    [ No update ]
[20:47:34] Info: Executing download command '/usr/bin/wget  -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.80Dxz4681c" http://rkhunter.sourceforge.net/1.3/backdoorports.dat 2>/dev/null'
[20:47:34] Info: This version  : 2010111401
[20:47:34] Info: Latest version: 2010111401
[20:47:34] Checking file backdoorports.dat                   [ No update ]
[20:47:34] Info: Executing download command '/usr/bin/wget  -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.80Dxz4681c" http://rkhunter.sourceforge.net/1.3/suspscan.dat 2>/dev/null'
[20:47:35] Info: This version  : 2009112901
[20:47:35] Info: Latest version: 2009112901
[20:47:35] Checking file suspscan.dat                        [ No update ]
[20:47:35] Info: Executing download command '/usr/bin/wget  -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.80Dxz4681c" http://rkhunter.sourceforge.net/1.3/i18n/1.4.2/i18n.ver 2>/dev/null'
[20:47:35] Info: This version  : 2009091601
[20:47:35] Info: Latest version: 2009091601
[20:47:35] Checking file i18n/cn                             [ No update ]
[20:47:35] Info: This version  : 2014010301
[20:47:35] Info: Latest version: 2014010301
[20:47:35] Checking file i18n/de                             [ No update ]
[20:47:35] Info: This version  : 2013112401
[20:47:35] Info: Latest version: 2013112401
[20:47:35] Checking file i18n/en                             [ No update ]
[20:47:35] Info: This version  : Binary file /var/lib/rkhunter/db/i18n/tr matches
[20:47:35] Info: Latest version: 2014030201
[20:47:35] Checking file i18n/tr                             [ No update ]
[20:47:35] Info: This version  : 2014030201
[20:47:35] Info: Latest version: 2014030201
[20:47:35] Checking file i18n/tr.utf8                        [ No update ]
[20:47:35] Info: This version  : Binary file /var/lib/rkhunter/db/i18n/zh matches
[20:47:35] Info: Latest version: 2009091601
[20:47:35] Checking file i18n/zh                             [ No update ]
[20:47:35] Info: This version  : 2009091601
[20:47:35] Info: Latest version: 2009091601
[20:47:35] Checking file i18n/zh.utf8                        [ No update ]

Итак, что означают эти ошибки? Нужно ли мне что-то делать с ними?

Информация о ОС:

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 15.10
Release:    15.10
Codename:   wily
Flavour: GNOME
GNOME Version: 3.18

Информация о ОС:

rkhunter:
  Installed: 1.4.2-3
  Candidate: 1.4.2-3
  Version table:
 *** 1.4.2-3 0
        500 http://archive.ubuntu.com/ubuntu/ wily/universe amd64 Packages
        100 /var/lib/dpkg/status