Securing using rkhunter.log

[HellMind]

Warning: The file properties have changed:
         File: /usr/bin/awk
         Current hash: ae1c0cf7a30fa9e2d582b2bdf13dcc711a6d8767
         Stored hash : a6a024873474418c6f68db27f6101a9ac170bc69
Warning: The file '/usr/bin/GET' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The file '/usr/bin/gawk' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The file '/usr/bin/lwp-request' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The file '/usr/sbin/unhide' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The file '/usr/sbin/unhide-linux26' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The SSH and rkhunter configuration options should be the same:
         SSH configuration option 'PermitRootLogin': yes
         Rkhunter configuration option 'ALLOW_SSH_ROOT_USER': no

One or more warnings have been found while checking the system.
Please check the log file (/var/log/rkhunter.log)

What should I do?