Web Analysis Using Analog
I mail a monthly report of web stats to a few of my customers who aren't on-line and who have found the daily reports were too long to print and took too much time to edit. To solve the problem and save time, I created month-vhost.cfg files which create ASCII text format reports. The month-vhost.cfg files are used in conjunction with the individual configuration files described above. A sample month-vhost.cfg file is shown in Listing 4. To produce the monthly text reports, +a is used on the command line to designate ASCII output:
analog -G +gmonth-vhost1.cfg +gwidgets.cfg\ +Owidget.txt +a
As I'm responsible for the entire system, it's important to have a review of the overall picture, including all our hosts. To accomplish this, I have a separate activity configuration file and run Analog once a day with a cron entry. The activity configuration file includes the log files for all hosts, and this requires giving extra information to Analog so it can format the results; otherwise, /index.html would be considered as belonging to one host. Commands in configuration files must be on one line. The LOGFILE command allows you to specify the name of the host corresponding to the log file (ignore line wrap):
LOGFILE /var/log/httpd/access_log http://main-isp.com/LOGFILE /var/log/httpd/vhost1.com-access_log http://vhost1.com
Our daily reports are published on the Web, so I prefer to keep cgi-bin information confidential. A daily webmaster e-mail report (described below) takes care of informing me of web-related exploits, so the information isn't required on the public reports. The cgi-bin directories and file names need to be aliased so that this information isn't available to the public. Analog can use output aliases to give control over how a file or directory is displayed within reports. This can be used to keep complete path and file names from the public, if desired. I use the following alias commands in my master.cfg files to translate cgi-bin path and file information to simply admin (ignore line wrap):
REQOUTPUTALIAS */cgi-bin/* "admin" DIROUTPUTALIAS */cgi-bin/* "admin" FAILOUTPUTALIAS */cgi-bin/* "admin" FAILREFOUTPUTALIAS */cgi-bin/* "admin" TYPEOUTPUTALIAS */cgi-bin/* "admin" REFOUTPUTALIAS http://main-isp.com/cgi-bin/* "admin" REDIROUTPUTALIAS */cgi-bin/* "admin"
The last two items are used in Virtual Host master.cfg files, so we're still not giving away information on other local hosts in referral reports. If you want to be more specific, you could alias file names to match what they do, such as the following line (ignore wrap):
REQOUTPUTALIAS */cgi-bin/bannerpro.pl* "Banner Program"
I have a number of partial pages such as footers, sidebars and headers in a global directory that could cause Analog to inflate the request totals out of proportion. When you exclude information, it usually relates to the entire host, so it makes sense to use exclude commands in the master.cfg instead of in individual page or site configuration files. To exclude global directory accesses from being counted as requests, I use the command:
Partial web pages, such as header-and footer-type files, can also be excluded individually with the PAGEEXCLUDE command:
PAGEEXCLUDE */footer.htmlor (for those who use PHP):
I use a small script to receive a daily Webmaster report. This is basically the same as the Activity report, but it includes information that's excluded from the public version. When I read my e-mail in the morning, I can see the status of my system over the last 24 hours. The script runs from cron, and since Analog will send results to STDOUT if no outfile is listed, I use this to my advantage. The output becomes the body of the e-mail. A bare-basics webmaster.cfg file is included in Listing 5.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
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This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide