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Extending your bash shell with aliases, functions and extra commands

Want a command to do some composite job, but it doesn't exist? You can add new commands into your bash script using

functions ... see example [here] from last week's course.

aliases ... here are the aliases that I'm using to provide my own extra / modified commands on our web server:
  -bash-4.1$ alias
  alias l.='ls -d .* --color=auto'
  alias ll='ls -l --color=auto'
  alias ls='ls --color=auto'
  alias pd='pushd'
  alias vi='vim'
  alias which='alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'
  -bash-4.1$


another script ...

adding executables ...

Shell programming is so much about bolting together other programs and utilities - and they can include other shell programs as well as code in other languages. Paramaters can be passed in from the command line, data from STDIN, and from the environment - remember to use export if you want a shell variable / environmet variable to be shared with something you're running from your script.
(written 2015-11-28)

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

A166 - Web Application Deployment - Linux Utilities
  [4682] One line scripts - Awk, Perl and Ruby - (2016-05-20)
  [3902] Shell - Grep - Sed - Awk - Perl - Python - which to use when? - (2012-10-22)
  [3764] Shell, Awk, Perl of Python? - (2012-06-14)
  [3446] Awk v Perl - (2011-09-18)
  [2638] Finding what has changed - Linux / Unix - (2010-02-17)
  [2484] Finding text and what surrounds it - contextual grep - (2009-10-30)
  [2320] Helping new arrivals find out about source code examples - (2009-08-03)
  [2145] Using the internet to remotely check for power failure at home (PHP) - (2009-04-29)
  [1690] Conversion of c/r line ends to l/f line ends - (2008-06-28)
  [1366] awk - a powerful data extraction and manipulation tool - (2007-09-25)
  [1361] Korn shell course - (2007-09-22)
  [71] Comparators in Linux and Unix - (2004-10-03)


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shell - bash. Writing conditional tests and statements - the options available
Some other Articles
Progress on moving from Python 2 to Python 3 - training for both versions
Principles or a GUI and their practical application using wxPthon
What teach you in a week stays with you for a decade
Extending your bash shell with aliases, functions and extra commands
What is make? What is gcc?
Back in the saddle again - excellent open source course from Well House Consultants
A near-empty plate of pastries - sign of a breakfast enjoyed
Thin application, thick objects - keep you main code simple. Example in Ruby
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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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