User manual REDHAT ENTERPRISE LINUX 4.5.0 REFERENCE GUIDE

[. . . ] Red Hat Enterprise Linux 4. 5. 0 4. 5. 0 Reference Guide ISBN: N/A Publication date: Red Hat Enterprise Linux 4. 5. 0 Red Hat Enterprise Linux 4. 5. 0: Reference Guide Copyright © 2007 Red Hat, Inc. Copyright © 2007 by Red Hat, Inc. This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, V1. 0 or later (the latest version is presently available at http://www. opencontent. org/openpub/). Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. Distribution of the work or derivative of the work in any standard (paper) book form for commercial purposes is prohibited unless prior permission is obtained from the copyright holder. [. . . ] It sets the number of threads within each child process. The default value for this directive is 25. 5. 10. Listen The Listen command identifies the ports on which the Web server accepts incoming requests. By default, the Apache HTTP Server is set to listen to port 80 for non-secure Web communications and (in the /etc/httpd/conf. d/ssl. conf file which defines any secure servers) to port 443 for secure Web communications. If the Apache HTTP Server is configured to listen to a port under 1024, only the root user can start it. For port 1024 and above, httpd can be started as a regular user. The Listen directive can also be used to specify particular IP addresses over which the server 166 Include accepts connections. 5. 11. Include Include allows other configuration files to be included at runtime. The path to these configuration files can be absolute or relative to the ServerRoot. Important For the server to use individually packaged modules, such as mod_ssl, mod_perl, and php, the following directive must be included in Section 1: Global Environment of httpd. conf: Include conf. d/*. conf 5. 12. LoadModule LoadModule is used to load Dynamic Shared Object (DSO) modules. More information on the Apache HTTP Server's DSO support, including instructions for using the LoadModule directive, can be found in Section 7, "Adding Modules". Note, the load order of the modules is no longer important with Apache HTTP Server 2. 0. Refer to Section 2. 1. 3, "Dynamic Shared Object (DSO) Support" for more information about Apache HTTP Server 2. 0 DSO support. 5. 13. ExtendedStatus The ExtendedStatus directive controls whether Apache generates basic (off) or detailed server status information (on), when the server-status handler is called. The server-status handler is called using Location tags. More information on calling server-status is included in Section 5. 60, "Location". 5. 14. IfDefine The IfDefine tags surround configuration directives that are applied if the "test" stated in the IfDefine tag is true. The directives are ignored if the test is false. The test in the IfDefine tags is a parameter name (for example, HAVE_PERL). If the parameter is defined, meaning that it is provided as an argument to the server's start-up command, then the test is true. In this case, when the Web server is started, the test is true and the directives contained in the IfDefine tags are applied. 5. 15. SuexecUserGroup The SuexecUserGroup directive, which originates from the mod_suexec module, allows the specification of user and group execution privileges for CGI programs. Non-CGI requests are 167 Chapter 10. [. . . ] If using this setting while in mode0 or 2 (the two load-balancing modes), the network switch must be configured to distribute packets evenly across the NICs. For more information on how to accomplish this, refer to /usr/share/doc/kernel-doc-<kernel-version>/Documentation/networking/ bonding. txt The value is set to 0 by default, which disables it. · arp_ip_target= -- Specifies the target IP address of ARP requests when the arp_interval parameter is enabled. Up to 16 IP addresses can be specified in a comma separated list. [. . . ]