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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
Stopping and restarting Apache httpd cleanly

If you'r running an Apache httpd server and you need to restart it, then you may be used to running:
apachectl stop
apachectl start

and in close succession, those should cause only a minor blip in service of perhaps a second or two; the sort of thing that can be put down to a "sticky internet". But you can do better

apachectl restart
Runs a configuration test before it stops the old daemon so that if you've editied your configuration file and introduced a fatal error, it won't go ahead with the stop. It also means that the restart is at electronic speed after the stop, curtting the blip. But you can do better

apachectl graceful
Runs the configuration test, AND allows currently open connections to be concluded before rebooting - thus ensuring that no-one gets a partial page as you cycle your httpd.

Note - if you have allowed per-directory changes to the configuration via .htaccess files, then you don't need to restart the server in any way when they're changed - they are checked at every web site "hit".
(written 2006-03-29, updated 2006-06-05)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A602 - Web Application Deployment - Apache httpd - Sourcing, Installation, Testing
  [523] Apache httpd release 2.2 - (2005-12-10)
  [526] Apache httpd - serving web documents from different directories - (2005-12-12)
  [550] 2006 - Making business a pleasure - (2006-01-01)
  [907] Browser -> httpd -> Tomcat -> MySQL. Restarting. - (2006-10-28)
  [982] Notes from the white board - (2006-12-14)
  [1095] Apache httpd , browser, MySQL and MySQL client downloads - (2007-02-28)
  [1292] DHCP automatic IP address v Static IP - (2007-08-06)
  [1449] Upgrade Mac OSX to Leopard, Web Server Apache httpd config lost - (2007-11-29)
  [1455] Connecting to MySQL 5 from PHP on Mac OSX Leopard - (2007-12-03)
  [1707] Configuring Apache httpd - (2008-07-12)
  [1731] Apache httpd, MySQL, PHP - installation procedure - (2008-08-01)
  [1768] What is built in to this httpd and PHP? - (2008-08-23)
  [1945] Summary - Apache httpd build on Linux - (2008-12-14)
  [2080] Using ApacheBench and jconsole to test and monitor Tomcat - (2009-03-14)
  [2096] Where is my new Apache httpd installed - (2009-03-22)
  [2184] Choosing the right version of Java and Tomcat - (2009-05-16)
  [2520] Global and Enable - two misused words! - (2009-11-30)
  [3426] Automed web site testing scripted in Ruby using watir-webdriver - (2011-09-09)
  [4437] Adding a PHP build option, rotating an image based on camera data, and a new look at thumbnails in PHP - (2015-02-22)


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An unhelpful error message from Apache httpd
Dressed up for a phone call
Stopping and restarting Apache httpd cleanly
Web Application Components
Keeping the visitors happy and browsing
The ternary operator in Python
Think about your design even if you don't use full UML
Can some food be TOO different?
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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