今天当我运行该命令时（我每天都运行该命令并且一切正常）：
sudo rkhunter --update
为了检查数据库文件的更新，我每次都会收到此错误：
[ Rootkit Hunter version 1.4.2 ]
Checking rkhunter data files...
Checking file mirrors.dat [ Update failed ]
Checking file programs_bad.dat [ Update failed ]
Checking file backdoorports.dat [ Update failed ]
Checking file suspscan.dat [ Update failed ]
Checking file i18n versions [ Update failed ]
Please check the log file (/var/log/rkhunter.log)
因此我检查了日志文件，其内容如下：
[11:52:57] Checking rkhunter data files...
[11:52:57] Info: Created temporary file '/var/lib/rkhunter/tmp/rkhunter.upd.5ztlaw3od5'
[11:52:57] Info: Created temporary file '/var/lib/rkhunter/tmp/mirrors.dat.9HiKnqrCFB'
[11:52:57] Info: The mirrors file has been rotated: /var/lib/rkhunter/db/mirrors.dat
[11:52:57] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.5ztlaw3od5" http://rkhunter.sourceforge.net/1.3/mirrors.dat 2>/dev/null'
[11:52:57] Warning: Download of 'mirrors.dat' failed: Unable to determine the latest version number.
[11:52:57] Checking file mirrors.dat [ Update failed ]
[11:52:57] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.5ztlaw3od5" http://rkhunter.sourceforge.net/1.3/programs_bad.dat 2>/dev/null'
[11:52:58] Warning: Download of 'programs_bad.dat' failed: Unable to determine the latest version number.
[11:52:58] Checking file programs_bad.dat [ Update failed ]
[11:52:58] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.5ztlaw3od5" http://rkhunter.sourceforge.net/1.3/backdoorports.dat 2>/dev/null'
[11:52:58] Warning: Download of 'backdoorports.dat' failed: Unable to determine the latest version number.
[11:52:58] Checking file backdoorports.dat [ Update failed ]
[11:52:58] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.5ztlaw3od5" http://rkhunter.sourceforge.net/1.3/suspscan.dat 2>/dev/null'
[11:52:58] Warning: Download of 'suspscan.dat' failed: Unable to determine the latest version number.
[11:52:58] Checking file suspscan.dat [ Update failed ]
[11:52:58] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.5ztlaw3od5" http://rkhunter.sourceforge.net/1.3/i18n/1.4.2/i18n.ver 2>/dev/null'
[11:52:59] Checking file i18n versions [ Update failed ]
[11:52:59] Warning: Download of 'i18n.ver' failed: Unable to determine the latest version number.
[11:52:59]
[11:52:59] Info: End date is Fri Jul 17 11:52:59 BST 2015
运行此命令时：
sudo rkhunter --versioncheck
我也收到类似的错误：
[ Rootkit Hunter version 1.4.2 ]
Checking rkhunter version...
This version : 1.4.2
Latest version: Download failed
这是为什么？我该如何解决？或者这不是我的问题？在这种情况下，我该怎么办？
操作系统信息：
Description: Ubuntu 15.04
Release: 15.04
封装信息：
rkhunter:
Installed: 1.4.2-0.4
Candidate: 1.4.2-0.4
Version table:
*** 1.4.2-0.4 0
500 http://gb.archive.ubuntu.com/ubuntu/ vivid/universe amd64 Packages
100 /var/lib/dpkg/status
答案1
总结sourceforge.net 网站是暂时地某些项目处于静态离线模式。
因此，什么也不要做，稍后再试;)
检查我的日志文件后
[13:12:22] Checking rkhunter data files...
[13:12:22] Info: Created temporary file '/var/lib/rkhunter/tmp/rkhunter.upd.UndVYmZ4q6'
[13:12:22] Info: Created temporary file '/var/lib/rkhunter/tmp/mirrors.dat.SZ4xQZhnLE'
[13:12:22] Info: The mirrors file has been rotated: /var/lib/rkhunter/db/mirrors.dat
[13:12:22] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.UndVYmZ4q6" http://rkhunter.sourceforge.net/1.3/mirrors.dat 2>/dev/null'
[13:12:22] Info: Download failed - 1 mirror(s) left.
[13:12:23] Info: Created temporary file '/var/lib/rkhunter/tmp/mirrors.dat.XOvMxBABzh'
[13:12:23] Info: The mirrors file has been rotated: /var/lib/rkhunter/db/mirrors.dat
[13:12:23] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.UndVYmZ4q6" http://rkhunter.sourceforge.net/1.3/mirrors.dat 2>/dev/null'
[13:12:23] Warning: Download of 'mirrors.dat' failed: Unable to determine the latest version number.
[13:12:23] Checking file mirrors.dat [ Update failed ]
[13:12:23] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.UndVYmZ4q6" http://rkhunter.sourceforge.net/1.3/programs_bad.dat 2>/dev/null'
[13:12:23] Warning: Download of 'programs_bad.dat' failed: Unable to determine the latest version number.
[13:12:23] Checking file programs_bad.dat [ Update failed ]
[13:12:23] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.UndVYmZ4q6" http://rkhunter.sourceforge.net/1.3/backdoorports.dat 2>/dev/null'
[13:12:24] Warning: Download of 'backdoorports.dat' failed: Unable to determine the latest version number.
[13:12:24] Checking file backdoorports.dat [ Update failed ]
[13:12:24] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.UndVYmZ4q6" http://rkhunter.sourceforge.net/1.3/suspscan.dat 2>/dev/null'
[13:12:24] Warning: Download of 'suspscan.dat' failed: Unable to determine the latest version number.
[13:12:24] Checking file suspscan.dat [ Update failed ]
[13:12:24] Info: Executing download command '/usr/bin/wget -q -O "/var/lib/rkhunter/tmp/rkhunter.upd.UndVYmZ4q6" http://rkhunter.sourceforge.net/1.3/i18n/1.4.2/i18n.ver 2>/dev/null'
[13:12:24] Checking file i18n versions [ Update failed ]
[13:12:24] Warning: Download of 'i18n.ver' failed: Unable to determine the latest version number.
我试过：
sudo /usr/bin/wget -O "/var/lib/rkhunter/tmp/rkhunter.upd.UndVYmZ4q6" http://rkhunter.sourceforge.net/1.3/mirrors.dat
结果
--2015-07-17 13:13:34-- http://rkhunter.sourceforge.net/1.3/mirrors.dat
Resolving rkhunter.sourceforge.net (rkhunter.sourceforge.net)... 216.34.181.96
Connecting to rkhunter.sourceforge.net (rkhunter.sourceforge.net)|216.34.181.96|:80... connected.
HTTP request sent, awaiting response... 503 Service Unavailable
2015-07-17 13:13:34 ERROR 503: Service Unavailable.
现在让我们检查一下http://rkhunter.sourceforge.net/1.3/mirrors.dat
The sourceforge.net website is temporarily in static offline mode.
Only a very limited set of project pages are available until the main website returns to service.