How can command substitution be utilized in shell scripts? Provide an example.

Command substitution is a feature in shell scripting that allows you to execute a command and substitute its output as part of another command or assign it to a variable. It provides a convenient way to capture the result of a command and use it within your script. There are two syntaxes for command substitution: 1. Using Backticks: * The backtick (`) character is used for command substitution, enclosing the command whose output you want to capture. * Example: ``` bash`# Assign the current date to a variable using command substitution current_date=`date +%Y-%m-%d` echo "Today's date is $current\_date"` ``` 2. Using Parentheses: * The dollar sign followed by parentheses (`$(command)`) is an alternative syntax for command substitution, providing improved readability and nesting capabilities....