logresolve [ -s filename ] [ -c ] < access_log > access_log.new
logresolve is a post-processing program to resolve IP-addresses in
Apache's access logfiles. To minimize impact on your nameserver, logre-
solve has its very own internal hash-table cache. This means that each
IP number will only be looked up the first time it is found in the log
Takes an Apache log file on standard input. The IP addresses must be
the first thing on each line and must be separated from the remainder
of the line by a space.
Specifies a filename to record statistics.
-c This causes logresolve to apply some DNS checks: after finding
the hostname from the IP address, it looks up the IP addresses
for the hostname and checks that one of these matches the origi-
Apache HTTP Server 2012-01-09 LOGRESOLVE(1)
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