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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.
Shell Script for CGI on the web

In the course of duty (providing simple "how-to" examples), I've come up with a short shell script in the Bourne again shell that allows a rudimentary lookup in a data file on a server running CGI. Nothing special about this, except it's a short example.

Run it from this link and try putting in data such as "Ca" and "DD" and "don". The source is also posted on our web site ... Enjoy!

Security note - you need to take extreme care with shell scripts that read from user form entrys and pass the values entered into commands like grep. I strongly recommend that you filter all inputs as I have done in the example using sed


(written 2004-09-26, updated 2006-06-05)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A167 - Web Application Deployment - Shell Programming (bash)
  [63] Almost like old times - (2004-09-26)
  [749] Cottage industry or production line data handling methods - (2006-06-07)
  [827] No news is good news with Unix and Linux - (2006-08-10)
  [1287] Work and play at Well House Manor - Football and Shell Shortcuts - (2007-08-02)
  [1345] Perl and Shell coding standards / costs of an IT project - (2007-09-11)
  [1468] Lexical v Arithemetic testing, Bash and Perl - (2007-12-11)
  [1527] Selecting file names in a shell - one word or another - (2008-02-02)
  [1904] Ruby, Perl, Linux, MySQL - some training notes - (2008-11-23)
  [3791] The Kernel, Shells and Daemons. Greek Gods in computing - (2012-07-01)
  [4400] Commenting out an echo killed my bash backup script - (2015-01-19)
  [4487] Starting MySQL. ERROR! The server quit without updating PID file - how we fixed it. - (2015-05-06)
  [4584] Bash ... some new scripts to - handling user input - (2015-11-27)
  [4586] Extending your bash shell with aliases, functions and extra commands - (2015-11-28)
  [4587] shell - bash. Writing conditional tests and statements - the options available - (2015-11-28)


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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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