centos 5.4로 서버 연습용 돌리고있는데요

http log파일
access.log 파일 실시간으로 확인하니

66.249.69.8 - - [26/Mar/2010:22:18:59 +0900] "GET /widgets/randomchat/skins/ HTTP/1.1" 200 928 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
221.238.204.194 - - [26/Mar/2010:22:32:37 +0900] "GET /manager/html HTTP/1.1" 404 290 "-" "Mozilla/3.0 (compatible; Indy Library)"
66.249.69.8 - - [26/Mar/2010:22:49:18 +0900] "GET /modules/board/skins/quiet_board/html/_head.html HTTP/1.1" 200 2405 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.69.8 - - [26/Mar/2010:23:20:09 +0900] "GET /modules/bodex/queries/deleteDocumentVotedLog.xml HTTP/1.1" 200 282 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.69.8 - - [26/Mar/2010:23:50:22 +0900] "GET /modules/communication/skins/default/filter/update_allow_message.xml HTTP/1.1" 200 160 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.69.8 - - [27/Mar/2010:00:20:41 +0900] "GET /modules/layout/queries/getLayoutModules.xml HTTP/1.1" 200 612 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"

이 메세지가 주기적으로 뜨는데 머땜에 뜨는걸까요.