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  Webalizer.

1. The Webalizer doesn't show me Referrers or User Agents?
    In order for the Webalizer to produce statistics for user agents (browsers) and referrers, that information needs to be in the log files produced by the web server. Most servers by default only produce CLF logs, which do not include the extra information. The way you have your server include this information depends on what server you are running. For apache, you need to edit the httpd.conf file (in the servers /conf directory) and...

    For apache 1.2, add the line: LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\"" For apache 1.3, use the line: CustomLog /var/lib/httpd/logs/access_log combined Other servers are similar. Refer to your servers documentation for additional information on how to enable referrers and user agents.

2. What systems will The Webalizer run on?
    The Webalizer was designed on and for an Intel system running Linux, however was written to be as close to ANSI/POSIX specs as possible in order to be easily ported to other platforms. I currently only have access to Linux systems running on Intel and PowerPC hardware, so can verify that it runs on those. In addition, I have received lots of mail from users indicating that The Webalizer will run on just about any *NIX machine out there from AIX to XENIX. (Other platforms also supported, such as OS/2 and MacOSX.. check the download page).
3. I get 'libgd not found' errors when compiling?
    The Webalizer uses the gd graphics library written by Tom Boutell for producing it's inline graphics. If you don't have this library or have it installed correctly, you will get this error. The Webalizer expects this library to be in the standard library path (ie: /usr/lib), so if you have it someplace else, you need to add an '-L[path]' flag to CFLAGS in the Makefile. If you don't have the library, get it at
4. I get 'No File or Directory' errors when compiling?
    The Makefile supplied with The Webalizer expects to find the header files for the gd graphics library in /usr/local/include/gd. If they are located somewhere else, you can either create a symbolic link to them, or edit the Makefile and specify the correct location.
5. What is the difference between 'HITS' and 'FILES'?
    There is an on-line quick help that explains most of the major terms and headings used in the reports. Basically, HITS is the total number of HTTP requests that the server received during the reporting period. Any request made to the server is considered a hit. FILES is the number of hits that actually resulted in something being sent back to the user, such as an HTML page or image. 'Total Files' and '200 - OK' totals should be the same. If you add up the totals in the 'Hits by Response Code' section, it should be the same as the 'Total Hits' figure.
6. My logs are HUGE! Can I run The Webalizer on partial logs?
    Yes!. With the release of version 1.2x, The Webalizer now supports incremental processing. This allows you to rotate your logs as often as needed without the loss of statistical detail between runs. Use the "Incremental" keyword in your configuration file, or the "-p" command line switch to enable incremental processing.
7. My Server doesn't do name lookups. Will The Webalizer?
    Yes. Version 2.00 and higher supports reverse DNS support. If you don't enable hostname lookups on your web server, you will get '100% Unresolved/Unknown' country totals. This is because your log files only have IP addresses and not names. While it is recommended that you let your web server handle the DNS lookups, DNS support can be used for those sites where DNS resolution is not an option.
8. I used the [Hide*] option, but it still shows up in the totals?
    Using the Hide* options only prevent that object from being displayed in the 'Top' table generated by The Webalizer. It is still counted in the totals. Version 0.99 of The Webalizer now has Ignore* options, which allow you to completely ignore certain objects for statistical purposes.
9. I used the [Group*] option, but it still shows up?
    Grouped items, by default, are not hidden. This allows you to display a group total as well as all the items that make up the grouping. If you don't want to see the individual items that match the group, then follow the Group* keyword with an identical Hide* one.
10. Changing the configuration file has no effect?
    Which configuration file are you changing? The Webalizer looks in the current directory for a file named webalizer.conf, which it will process before any other configuration files. If one is not present in the current directory, it will look for the file /etc/webalizer.conf, and process it before any other configuration files. Some configuration options allow you to toggle settings on or off, while some cannot be reversed. If you, for example specify the configuration option "HideURL *.gif" in the system wide default file /etc/webalizer.conf, you cannot 'un-hide' that object using a local configuration file. In general, single sites should have a single configuration file, such as /etc/webalizer.conf. Larger sites that have multiple host/virtual hosts probably should use different configuation files for each host and not have a default webalizer.conf file.

11. My configuration file is being read twice!
    Do Not use '-c webalizer.conf' on the command line! This file is always read if found, regardless of any other configuration files that may be specified. If you do specify it on the command line, it will be read twice...
12. I get Error adding xxx node, skipping ... errors! Why?
    You ran out of memory. The error occurs when a malloc call is made to allocate free memory, and fails. You can increase your swap space, but the only real solution is to add more physical memory.
13. I get Warning: Truncating oversized xxx or String exceeds storage size warnings! Why?
    Internally, The Webalizer has a fixed maximum size for various parts of the log record. If a particular field is longer than will fit, you will see these warnings. The most common is that for the request field on sites that have a lot of CGI interaction. They can be safely ignored. If you don't want to see warnings or errors, you can use the ReallyQuiet option (-Q command line switch) to supress them.
14. Why don't the daily visit totals add up to the monthly total?
    You cannot add up the daily visit totals and compare them to the monthly total, they are different reporting periods. For example, if someone visits your site at 11:45pm and stays until 12:15am, the monthly total would show one visit, while the daily totals will show two (one for each day).
15. Why do my reports show more Sites than Visits?
    Visits are only triggered when a valid request is found for a page, as defined by your PageType setting (or a URL that ends with a slash, which is also considered a page type). Sites however, are counted regardless of the request type. It is very common to have more sites than visits, particularly if you host non-pagetype URLs on your site that are linked to from the outside. If you are not hosting URLs that are linked to from outside sites, then make sure your PageType setting is correct. The default is .htm, .html and .cgi extensions, unless you specify otherwise.
16. How can I process multiple logs from a server farm?
    Q: I have multiple load-balanced servers (or I'm using DNS round-robin to accoplish the same thing) and I want to generate one webalizer report for the whole farm, but each server generates its own log file. When I run webalizer on each of the logfiles in turn, it ignores a lot of the records because it thinks they're out of order!

    A: You need to merge all of the logfiles together so that webalizer sees the records in chronological order. One good way to do that on the fly is with mergelog ( http://mergelog.sourceforge.net/) , a quick common logfile sorter. An example:

    mergelog .log .log .log | webalizer

    Another method is to simply combine your logs and then sort them into chronological order. Here is a simple shell script that uses the GNU sort utility to sort an already combined log file:

    #!/bin/sh if [ ! -f $1 ]; then echo "Usage: $0 " exit fi echo "Sorting $1" sort -t ' ' -k 4.9,4.12n -k 4.5,4.7M -k 4.2,4.3n -k 4.14,4.15n -k 4.17,4.18n -k 4.20,4.21n $1 > $1.sorted

17. How can I easily process multiple virtual hosts?
    There are many ways to process multiple virtual hosts on the same machine. The easiest way I have found, provided that each host generates it's own log file, is as follows:

    1. Create a central directory for your configuration files. (I use /etc/webalizer)
    2. Make a configuration file for each virtual host and place them in the central directory. Each configuration file should have at least the HostName (domain), OutputDir and LogFile configuration settings specified. You probably will want to specify other settings specific to the domain, such as HideReferrer, HideSite and maybe some others as well. Name the file the same as the domain name, and end it with a .conf extension, so you can easily tell what vhost the configuration is for.
    3. To process all your virtual sites with a single command, a simple shell command can now be used:

      for i in /etc/webalizer/*.conf; do webalizer -c $i; done

    After you have it set up, to add a new host, all you need to do is create a new configuration file and put it in the directory. It will be automatically picked up the next time you run the command.
18. I am having problems compiling w/DNS support!
    Lots of people have problems compiling DNS support into the Webalizer, which is why you have to specifically enable it. If you don't really need DNS support, don't try to compile it in. The vast majority of sites can get by simply turning on hostname lookups on their web server, which will do the DNS resolution for you automatically. If you really need built in DNS support, it's really quite simple, however different distributions place the required headers and libraries in different places, so the configure script fails to find them. In a nutshell, you need the Berkeley DB libary, and it needs to be configured with V1.85 API support. Most Linux distributions already have this library present. If you get errors about not finding the proper header file (db_185.h), locate it on your system and create a symbolic link to it in the /usr/include directory. You will also need to specify the correct library to use for the header. This may mean that you need to first run the configure script, then if the compile fails due to unresolved references, edit the Makefile and change the -ldb (or -ldb1) reference to the correct library, such as -ldb-3.2 for RedHat, or just -ldb for Slackware 8. Each distribution either names the library something different, or puts it in a different location, so you will have to play around with it on your distro to get it to work. If the library is in some non-standard location, you may also need to specify it's path using the --with-dblib=... switch when you run the configure script. Bottom line is, if you don't really need it (and most people don't), just compile without DNS support and let your web server do the name lookups for you.

    Submitted by Victor Brilon:
    To compile under RH 7.x or 8.x using DNS resolver, you must use this command line:
    ./configure --enable-dns --with-db=/usr/include/db1
    You must have the db1 and the db1-devel RPMs installed in order to do this.

19. Where can I get additional help?
    First, read the documentation! 99.9% of all questions I receive are answered in the available documentation. Start by carefully reading the README file . If you still can't find an answer, try doing a quick search on the web using your favorite search engine, or in the newsgroups. Installation problems can usually be solved by reading the INSTALL document, or the many third party documents found on the web, such as documentation packages (look under the SysAdmin Guides section).
    There is also a discussion forum at Yahoo Groups. If all else fails, you can send me an e-mail, however due to the amount of mail I receive each day, you may or may not get a timely response.

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