What's in a Log Anyway?

Example

ciao.intergraph.com - - [13/Aug/1998:16:41:44 -0400] "GET /WWW/software/CGI/CGI.pm-2.42.tar.gz HTTP/1.0" 200 174980
ciao.intergraph.com - - [13/Aug/1998:16:42:05 -0400] "GET /WWW/software/CGI/ HTTP/1.0" 200 2421
ciao.intergraph.com - - [13/Aug/1998:16:42:42 -0400] "GET /WWW/software/CGI/cgi_docs.html HTTP/1.0" 200 1965
ciao.intergraph.com - - [13/Aug/1998:16:42:45 -0400] "GET /WWW/software/CGI/cgi_docs.html HTTP/1.0" 200 1974
hdp.texascommerce.com - - [13/Aug/1998:16:43:18 -0400] "GET /WWW/software/CGI/cgi_docs.html HTTP/1.0" 200 184948
170.252.240.1 - - [13/Aug/1998:16:43:53 -0400] "GET /WWW/software/CGI/examples/dna.small.gif HTTP/1.0" 200 2734
ciao.intergraph.com - - [13/Aug/1998:16:44:10 -0400] "GET /WWW/software/CGI/ HTTP/1.0" 200 28459
170.252.240.1 - - [13/Aug/1998:16:44:29 -0400] "GET /WWW/software/CGI/examples/caution.xbm HTTP/1.0" 200 741
170.252.240.1 - - [13/Aug/1998:16:44:48 -0400] "GET /WWW/software/CGI/cgi_docs.html HTTP/1.0" 200 167995
195.186.1.128 - - [13/Aug/1998:16:45:01 -0400] "GET /WWW/software/CGI/examples/dna.small.gif HTTP/1.0" 200 2734
ip253.isdn6-boston.ma.pub-ip.psi.net - - [13/Aug/1998:16:45:07 -0400] "GET /WWW/software/CGI/GD.html HTTP/1.0" 301 249

Common Log Format Fields

1.	ciao.intergraph.com	Hostname/IP Address
2.	lstein	identd information
3.	Lincoln	Authorization username
4.	[13/Aug/1998:16:45:07 -0400]	Date and time
5.	"GET /index.html"	The request
6.	HTTP/1.1	HTTP version
7.	200	Status code
8.	741	Bytes transferred

Contents

Lincoln D. Stein, lstein@cshl.org
Cold Spring Harbor Laboratory

Last modified: Mon Aug 17 10:40:29 EDT 1998