Introduction to the Apache Web Server - ApacheCon

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16.4 Exercises 1. Construct a log file containing the exact time taken to serve the request, in microseconds. 2. Construct a log file that shows which virtual host the request was made to. 3. Add mod log io to your server, using apxs, and construct a log file containing the exact number of bytes transferred. 16.4.1 Error logs Location of the error log ErrorLog logs/error log Note that path is Relative to ServerRoot 16.4.2 LogLevel • emerg • alert • crit • error • warn • notice • info • debug 16.5 Typical errors • Document error [Fri Aug 18 22:36:26 2000] [error] [client 192.168.1.6] File does not exist: /usr/local/apache/bugletdocs/Img/south-korea.gif As with access log, error message is in several distinct parts 100
• Authentication error [Tue Apr 11 22:13:21 2000] [error] [client 192.168.1.3] user rbowen authentication failure for "/cgi-bin/hirecareers/company.cgi": password mismatch • CGI errors Wed Jun 14 16:16:37 2000] [error] [client 192.168.1.3] Premature end of script headers: /usr/local/apache/cgi-bin/TestProg/announcement.cgi Global symbol "$rv" requires explicit package name at /usr/local/apache/cgi-bin/TestProg/announcement.cgi line 81. Global symbol "%details" requires explicit package name at /usr/local/apache/cgi-bin/TestProg/announcement.cgi line 84. Global symbol "$Config" requires explicit package name at /usr/local/apache/cgi-bin/TestProg/announcement.cgi line 133. Execution of /usr/local/apache/cgi-bin/TestProg/announcement.cgi aborted due to compilation errors. 16.5.1 Things to remember! • The error log is your friend • tail -f /usr/local/apache/logs/error_log • Watch the log while you are working on stuff. 16.6 Logfile reporting 16.6.1 What your log file tells you • Address of remote machine • Time of visit • Resource requested • What’s broken 16.6.2 What your log file does not tell you • Who is visiting – Proxies – Caches 101
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Introduction to the Apache Web Serv
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3.1 Apache process architecture . .
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8.3 Alias . . . . . . . . . . . . .
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13 SSI 75 13.1 Configuration for SS
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16.5 Typical errors . . . . . . . .
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19.8 Modules . . . . . . . . . . .
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23.1 Caching . . . . . . . . . . .
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He wrote the CERN web server, and t
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• provide a foundation for open,
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This is a good point to encourage d
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• htdocs • icons Show the stude
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./configure --help ./configure --pr
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2.6 apxs apxs is a Perl utility for
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The “correct” value for these d
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• Some modules, like mod php, don
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• help apachectl symlink You may
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Section 4 Configuration files http:
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directory - Can be used in a secti
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httpd -DUSESSL Then you could add a
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Section 5 .htaccess files 5.1 Confi
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5.3 Exercise Create .htaccess file
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ServerName www.foo.com DocumentRoot
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3. Verify that they are serving con
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Section 7 MIME http://httpd.apache.
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AddType application/x-tar tgz Note
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7.4.3 mod gzip More will be said ab
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Section 8 URL Mapping http://httpd.
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Equivalent to ... Alias /cgi-bin/ /
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Then /cgi-bin/404.cgi will look lik
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