我在Debian Linux 5.x下为我的网络启动并运行了基于rsnapshot的备份服务器。
但是，每当我使用以下命令运行备份作业时：rsnapshot -v -c /root/rsnapshot.server1.conf每小时，我会在屏幕上收到以下消息：

WARNING: Could not lchown() symlink “/nas/.rsnapshot/hourly.1/server1.example.com/etc/alternatives/locate”
WARNING: Could not lchown() symlink “/nas/.rsnapshot/hourly.1/server1.example.com/etc/alternatives/nc.1.gz”
WARNING: Could not lchown() symlink “/nas/.rsnapshot/hourly.1/server1.example.com/etc/alternatives/jexec-binfmt”
WARNING: Could not lchown() symlink “/nas/.rsnapshot/hourly.1/server1.example.com/etc/alternatives/servertool”

我该如何解决这个问题？
您需要在支持lchown的系统上安装Lchown模块，该模块为lchown UNIX系统调用提供perl接口。

lchown()调用用于更改符号链接的所有权和组。
要安装相同的文件，请执行：

sudo apt-get update
sudo apt-get install liblchown-perl

输出示例：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  xmms2-plugin-pulse xmms2-plugin-id3v2 xmms2-plugin-alsa xmms2-core xmms2-plugin-vorbis xmms2-plugin-mad xmms2-client-cli
Use 'apt-get autoremove' to remove them.
The following NEW packages will be installed:
  liblchown-perl
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 9,574B of archives.
After this operation, 81.9kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com karmic/universe liblchown-perl 1.00-1 [9,574B]
Fetched 9,574B in 0s (10.9kB/s)       
Selecting previously deselected package liblchown-perl.
(Reading database ... 123150 files and directories currently installed.)
Unpacking liblchown-perl (from .../liblchown-perl_1.00-1_amd64.deb) ...
Processing triggers for man-db ...
Setting up liblchown-perl (1.00-1) ...

对于其他类似UNIX的操作系统

使用软件包管理器或者从cpan.org下载它，或者使用cpan命令/shell安装它：

cpan -A Lchown
cpan -i Lchown