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Linux Shell Scripting Bootcamp

You're reading from   Linux Shell Scripting Bootcamp The fastest way to learn Linux shell scripting

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781787281103
Length 208 pages
Edition 1st Edition
Tools
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Author (1):
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James K Lewis James K Lewis
Author Profile Icon James K Lewis
James K Lewis
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Toc

Table of Contents (12) Chapters Close

Preface 1. Getting Started with Shell Scripting 2. Working with Variables FREE CHAPTER 3. Using Loops and the sleep Command 4. Creating and Calling Subroutines 5. Creating Interactive Scripts 6. Automating Tasks with Scripts 7. Working with Files 8. Working with wget and curl 9. Debugging Scripts 10. Scripting Best Practices Index

Creating new commands from a template


Since you are reading this book it can be assumed that you are going to be writing a good number of scripts. Here is another handy trick I learned over the years. When I need to create a new script, instead of doing it from scratch I use this simple command:

Chapter 10 – Script 2

#!/bin/sh
#
# 1/26/2014
#
# create a command script

if [ $# -eq 0 ] ; then
 echo "Usage: mkcmd command"
 echo " Copies mkcmd.template to command and edits it with kw"
 exit 255
fi

if [ -f $1 ] ; then
  echo File already exists!
  exit 2
fi

cp $BIN/mkcmd.template $1
kw $1
exit 0


And here is the contents of the $BIN/mkcmd.template file:
#!/bin/sh
#
# Date
#
if [ $# -eq 0 ] ; then
 echo "Usage:                "
 echo "                      "
 exit 255
fi

Be sure that after you create the mkcmd.template file that you run chmod 755 on it. That way you do not have to remember to do it every time on your new commands. In fact, that was the main reason I wrote this script.

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