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Linux System Administration
book

Linux System Administration

by Tom Adelstein, Bill Lubanovic
March 2007
Intermediate to advanced content levelIntermediate to advanced
304 pages
11h 12m
English
O'Reilly Media, Inc.
Content preview from Linux System Administration
152
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Chapter 6: Administering Apache
Permissions problems can be fixed by changing the owner of the file to the process
running Apache.
Virtual Hosts Don’t Work
Use
# apache2ctl -S
for a quick check of your virtual host directives.
SSI Doesn’t Work
If you see lines like this in your error log (/var/log/apache2/error.log):
[error] an unknown filter was not added: INCLUDES
you didn’t enable mod_include. Run the command:
# a2enmod include
CGI Program Doesn’t Run
If you can’t get a CGI program to run, work through the following checklist:
Has CGI been enabled, by one of the methods discussed earlier?
Is the CGI program in a CGI directory like /var/cgi-bin, or does it have a suffix
like .php?
Is the file readable? If not, use chmod.
What does the Apache error log say?
How about the system error log, /var/log/messages?
SSL Doesn’t Work
Check that you enabled the Apache SSL module (a2enmod ssl) and told Apache to
listen to port 443 in /etc/apache2/ports.conf:
Listen 443
If the directive wasn’t there, add it and restart Apache. Then try to access this URL in
your browser: https://server1.centralsoft.org. If it still doesn’t work, port 443 may be
blocked by a firewall. You can check this with nmap:
# nmap -P0 -p 443 server1.centralsoft.org
Starting nmap 3.70 ( http://www.insecure.org/nmap/ ) at 2006-08-01 22:38 CDT
Interesting ports on ... (...):
PORT STATE SERVICE
443/tcp open https
Nmap run completed -- 1 ...
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Publisher Resources

ISBN: 9780596009526Supplemental ContentCatalog PageErrata