unix getopts example

Bash Getopts-Allow your script to support command line parameters In the past, I always wanted to know how to create command line parameters for my Bash script. After searching, I found two functions that can solve this problem: the getopt function

The getopts parsing command line parameter getopts command is built in shell. you can get the valid command line parameters specified by a single character. each character has a & amp; lsquo; -& amp; rsquo; No. or & amp; lsquo; + & amp; rsquo; No.

Transferred from: http://yejinxin.github.io/parse-shell-options-with-getopts-command/Standard UNIX commands generally offer a number of options, with the user providing specific options and parameters, in the form of a command line, as

Find a very detailed Linux shell script tutorial, in fact, not only the shell script programming, but also introduced the system of various commandsHttp://vdisk.weibo.com/s/yVBlEojGMQMpvThis book is divided into five parts, in detail the shell

We have discussed how to use a specific variable $1 $9 to pass parameters to the script. $ Is used to count the number of passed parameters. You can create a usage statement to notify you how to call a script or function with appropriate parameters

Options for UNIX types: UNIX has the advantage that standard UNIX commands have the same command-line format at execution time: command-options parameters if the shell is executed in the same format, the Bourne shell provides a A statement that

Focus on Listing 7Now, many Linux® and UNIX® systems have bash shells, which are the common default shells on Linux. In this article, you'll learn how to handle parameters and options in a bash script, and how to use the shell's parameter extensions

Python,perl,bash command line parameter part Idaily recurring and perl,python,bash dealings, but often confused between them, on the command line of the special and index differences, Python is really humanized, but the command line is very

1. Obtain the string length. Method 1: $ Echo $ {# variable} Code: PHP code: zhyfly :~ $ X = "this is a test"Zhyfly :~ $ Echo $ {# x}14 Method 2: $ Expr length "$ variable" Code: PHP code: zhyfly :~ $ X = "this is a test"Zhyfly :~ $ Expr length "$ X"

Directory Part 1. Warm up Why use shell programming? Start with a sha-bang (Sha-bang refers #!) Call a script Preliminary exercises Part 2. Basics Special characters Introduction to variables and parameters Variable