Whenever I run a backup job using the following command:
rsnapshot -v -c /root/rsnapshot.server1.conf hourly
I get the following messages on screen:

Code:
    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"
How to fix this problem?

You need to install the Lchown module which provides a perl interface to the lchown UNIX system call, on systems that support lchown. The lchown() call is used to change the ownership and group of symbolic links. To install the same:
Code:
sudo apt-get update
sudo apt-get install liblchown-perl