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Basic and Advanced Unix Commands with Examples (Tutorial #2 Part A)
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Basic UNIX Commands
Introduction to UNIX
Basic and Advanced Unix Commands with Examples (Tutorial #2 Part A)
Unix Environment Variables
Variables in Shell Scripting
VARIABLES IN SHELL SCRIPTING
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How to Work with Variables in Bash
Variables are named symbols that represent either a string or numeric value. When you use them in commands and expressions, they are treated as if you had typed the value they hold instead of the nam…
shell
echo "Please input date[yyyy-mm-dd]: ". read date. echo $date | sed 's/\-/ /g' #this will give me the output of yyyy mm dd. I want to assign that three numbers (yyyy, mm, dd) to a …
bash
The key feature here is the concept of conditional ${parameter} expansion. You can set a variable to a value only if it is unset or null using the form: ${var_name:= desired_value} If …
Linux Bash: Multiple Variable Assignment
Multiple Variable Assignment. Multiple variable assignment is also known as tuple unpacking or iterable unpacking. It allows us to assign multiple variables at the same time in one single line of code. Let’s take a look …
Unix / Linux
In this chapter, we will learn how to use Shell variables in Unix. A variable is a character string to which we assign a value. The value assigned could be a number, text, filename, device, or any …
How can I assign the output of a command to a shell variable?
I want to assign the result of an expression (i.e., the output from a command) to a variable and then manipulate it – for example, concatenate it with a string, then echo it. Here's what I've got: …
Assign values to shell variables
Creating and setting variables within a script is fairly simple. Use the following syntax: varName= someValue. someValue is assigned to given varName and someValue …
bash
While researching more in-depth information about Bash subshells, I ran into an interesting execution that I would like to understand why it works. The execution involves …
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VIDEO
COMMENTS
Variables are named symbols that represent either a string or numeric value. When you use them in commands and expressions, they are treated as if you had typed the value they hold instead of the nam…
echo "Please input date[yyyy-mm-dd]: ". read date. echo $date | sed 's/\-/ /g' #this will give me the output of yyyy mm dd. I want to assign that three numbers (yyyy, mm, dd) to a …
The key feature here is the concept of conditional ${parameter} expansion. You can set a variable to a value only if it is unset or null using the form: ${var_name:= desired_value} If …
Multiple Variable Assignment. Multiple variable assignment is also known as tuple unpacking or iterable unpacking. It allows us to assign multiple variables at the same time in one single line of code. Let’s take a look …
In this chapter, we will learn how to use Shell variables in Unix. A variable is a character string to which we assign a value. The value assigned could be a number, text, filename, device, or any …
I want to assign the result of an expression (i.e., the output from a command) to a variable and then manipulate it – for example, concatenate it with a string, then echo it. Here's what I've got: …
Creating and setting variables within a script is fairly simple. Use the following syntax: varName= someValue. someValue is assigned to given varName and someValue …
While researching more in-depth information about Bash subshells, I ran into an interesting execution that I would like to understand why it works. The execution involves …