Shell Scripting Tutorial for Beginners 4 - Pass Arguments to a Bash-Script
374.5 هزار بار بازدید -
8 سال پیش
-
Passing arguments to a shell
Passing arguments to a shell script
Any shell script you run has access to (inherits) the environment variables accessible to its parent shell. In addition, any arguments you type after the script name on the shell command line are passed to the script as a series of variables.
The following parameters are recognized:
$*
Returns a single string (``$1, $2 ... $n'') comprising all of the positional parameters separated by the internal field separator character (defined by the IFS environment variable).
$@
Returns a sequence of strings (``$1'', ``$2'', ... ``$n'') wherein each positional parameter remains separate from the others.
$1, $2 ... $n
Refers to a numbered argument to the script, where n is the position of the argument on the command line. In the Korn shell you can refer directly to arguments where n is greater than 9 using braces. For example, to refer to the 57th positional parameter, use the notation ${57}. In the other shells, to refer to parameters with numbers greater than 9, use the shift command; this shifts the parameter list to the left. $1 is lost, while $2 becomes $1, $3 becomes $2, and so on. The inaccessible tenth parameter becomes $9 and can then be referred to.
$0
Refers to the name of the script itself.
$#
Refers to the number of arguments specified on a command line.
★★★Top Online Courses From ProgrammingKnowledge ★★★
Python Programming Course ➡️ http://bit.ly/2vsuMaS ⚫️ http://bit.ly/2GOaeQB
Java Programming Course ➡️ http://bit.ly/2GEfQMf ⚫️ http://bit.ly/2Vvjy4a
Bash Shell Scripting Course ➡️ http://bit.ly/2DBVF0C ⚫️ http://bit.ly/2UM06vF
Linux Command Line Tutorials ➡️ http://bit.ly/2IXuil0 ⚫️ http://bit.ly/2IXukt8
C Programming Course ➡️ http://bit.ly/2GQCiD1 ⚫️ http://bit.ly/2ZGN6ej
C++ Programming Course ➡️ http://bit.ly/2V4oEVJ ⚫️ http://bit.ly/2XMvqMs
PHP Programming Course ➡️ http://bit.ly/2XP71WH ⚫️ http://bit.ly/2vs3od6
Android Development Course ➡️ http://bit.ly/2UHih5H ⚫️ http://bit.ly/2IMhVci
C# Programming Course ➡️ http://bit.ly/2Vr7HEl ⚫️ http://bit.ly/2W6RXTU
JavaFx Programming Course ➡️ http://bit.ly/2XMvZWA ⚫️ http://bit.ly/2V2CoAi
NodeJs Programming Course ➡️ http://bit.ly/2GPg7gA ⚫️ http://bit.ly/2GQYTQ2
Jenkins Course For Developers and DevOps ➡️ http://bit.ly/2Wd4l4W ⚫️ http://bit.ly/2J1B1ug
Scala Programming Tutorial Course ➡️ http://bit.ly/2PysyA4 ⚫️ http://bit.ly/2PCaVj2
Bootstrap Responsive Web Design Tutorial ➡️ http://bit.ly/2DFQ2yC ⚫️ http://bit.ly/2VoJWwH
MongoDB Tutorial Course ➡️ http://bit.ly/2LaCJfP ⚫️ http://bit.ly/2WaI7Ap
QT C++ GUI Tutorial For Beginners ➡️ http://bit.ly/2vwqHSZ
★★★ Online Courses to learn ★★★
Get 2 FREE Months of Unlimited Classes from skillshare - https://skillshare.eqcm.net/r1KEj
Data Science - http://bit.ly/2lD9h5L | http://bit.ly/2lI8wIl
Machine Learning - http://bit.ly/2WGGQpb | http://bit.ly/2GghLXX
Artificial Intelligence - http://bit.ly/2lYqaYx | http://bit.ly/2NmaPya
MERN Stack E-Degree Program - http://bit.ly/2kx2NFe | http://bit.ly/2lWj4no
DevOps E-degree - http://bit.ly/2k1PwUQ | http://bit.ly/2k8Ypfy
Data Analytics with R - http://bit.ly/2lBKqz8 | http://bit.ly/2lAjos3
AWS Certification Training - http://bit.ly/2kmLtTu | http://bit.ly/2lAkQL1
Projects in Java - http://bit.ly/2kzn25d | http://bit.ly/2lBMffs
Machine Learning With TensorFlow - http://bit.ly/2m1z3AF | http://bit.ly/2lBMhnA
Angular 8 - Complete Essential Guide - http://bit.ly/2lYvYRP
Kotlin Android Development Masterclass - http://bit.ly/2GcblsI
Learn iOS Programming Building Advance Projects - http://bit.ly/2kyX7ue
★★★ Follow ★★★
My Website - http://www.codebind.com
DISCLAIMER: This video and description contains affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. This help support the channel and allows us to continue to make videos like this. Thank you for the support!
Any shell script you run has access to (inherits) the environment variables accessible to its parent shell. In addition, any arguments you type after the script name on the shell command line are passed to the script as a series of variables.
The following parameters are recognized:
$*
Returns a single string (``$1, $2 ... $n'') comprising all of the positional parameters separated by the internal field separator character (defined by the IFS environment variable).
$@
Returns a sequence of strings (``$1'', ``$2'', ... ``$n'') wherein each positional parameter remains separate from the others.
$1, $2 ... $n
Refers to a numbered argument to the script, where n is the position of the argument on the command line. In the Korn shell you can refer directly to arguments where n is greater than 9 using braces. For example, to refer to the 57th positional parameter, use the notation ${57}. In the other shells, to refer to parameters with numbers greater than 9, use the shift command; this shifts the parameter list to the left. $1 is lost, while $2 becomes $1, $3 becomes $2, and so on. The inaccessible tenth parameter becomes $9 and can then be referred to.
$0
Refers to the name of the script itself.
$#
Refers to the number of arguments specified on a command line.
★★★Top Online Courses From ProgrammingKnowledge ★★★
Python Programming Course ➡️ http://bit.ly/2vsuMaS ⚫️ http://bit.ly/2GOaeQB
Java Programming Course ➡️ http://bit.ly/2GEfQMf ⚫️ http://bit.ly/2Vvjy4a
Bash Shell Scripting Course ➡️ http://bit.ly/2DBVF0C ⚫️ http://bit.ly/2UM06vF
Linux Command Line Tutorials ➡️ http://bit.ly/2IXuil0 ⚫️ http://bit.ly/2IXukt8
C Programming Course ➡️ http://bit.ly/2GQCiD1 ⚫️ http://bit.ly/2ZGN6ej
C++ Programming Course ➡️ http://bit.ly/2V4oEVJ ⚫️ http://bit.ly/2XMvqMs
PHP Programming Course ➡️ http://bit.ly/2XP71WH ⚫️ http://bit.ly/2vs3od6
Android Development Course ➡️ http://bit.ly/2UHih5H ⚫️ http://bit.ly/2IMhVci
C# Programming Course ➡️ http://bit.ly/2Vr7HEl ⚫️ http://bit.ly/2W6RXTU
JavaFx Programming Course ➡️ http://bit.ly/2XMvZWA ⚫️ http://bit.ly/2V2CoAi
NodeJs Programming Course ➡️ http://bit.ly/2GPg7gA ⚫️ http://bit.ly/2GQYTQ2
Jenkins Course For Developers and DevOps ➡️ http://bit.ly/2Wd4l4W ⚫️ http://bit.ly/2J1B1ug
Scala Programming Tutorial Course ➡️ http://bit.ly/2PysyA4 ⚫️ http://bit.ly/2PCaVj2
Bootstrap Responsive Web Design Tutorial ➡️ http://bit.ly/2DFQ2yC ⚫️ http://bit.ly/2VoJWwH
MongoDB Tutorial Course ➡️ http://bit.ly/2LaCJfP ⚫️ http://bit.ly/2WaI7Ap
QT C++ GUI Tutorial For Beginners ➡️ http://bit.ly/2vwqHSZ
★★★ Online Courses to learn ★★★
Get 2 FREE Months of Unlimited Classes from skillshare - https://skillshare.eqcm.net/r1KEj
Data Science - http://bit.ly/2lD9h5L | http://bit.ly/2lI8wIl
Machine Learning - http://bit.ly/2WGGQpb | http://bit.ly/2GghLXX
Artificial Intelligence - http://bit.ly/2lYqaYx | http://bit.ly/2NmaPya
MERN Stack E-Degree Program - http://bit.ly/2kx2NFe | http://bit.ly/2lWj4no
DevOps E-degree - http://bit.ly/2k1PwUQ | http://bit.ly/2k8Ypfy
Data Analytics with R - http://bit.ly/2lBKqz8 | http://bit.ly/2lAjos3
AWS Certification Training - http://bit.ly/2kmLtTu | http://bit.ly/2lAkQL1
Projects in Java - http://bit.ly/2kzn25d | http://bit.ly/2lBMffs
Machine Learning With TensorFlow - http://bit.ly/2m1z3AF | http://bit.ly/2lBMhnA
Angular 8 - Complete Essential Guide - http://bit.ly/2lYvYRP
Kotlin Android Development Masterclass - http://bit.ly/2GcblsI
Learn iOS Programming Building Advance Projects - http://bit.ly/2kyX7ue
★★★ Follow ★★★
My Website - http://www.codebind.com
DISCLAIMER: This video and description contains affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. This help support the channel and allows us to continue to make videos like this. Thank you for the support!
8 سال پیش
در تاریخ 1395/12/14 منتشر شده
است.
374,589
بـار بازدید شده