To answer this question, we need to understand the concept of logical operators in shell scripting.

In shell scripting, the || operator is the logical OR operator, and the && operator is the logical AND operator.

When the || operator is used, the command following it will only be executed if the preceding command fails or returns a non-zero exit status. On the other hand, when the && operator is used, the command following it will only be executed if the preceding command succeeds or returns a zero exit status.

Let's go through the given command step by step:

1. echo this - This command will be executed and will output "this" to the console.

2. echo that - This command will not be executed because the preceding command (echo this) succeeds and returns a zero exit status.

3. echo other - This command will be executed and will output "other" to the console.

Therefore, the output of the given command "echo this || echo that && echo other" will be "this other".

The correct answer is option D) this other.

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• Wrong explanation

To create a new file without opening it, you can use the touch command.

Option A) pico filename - This option is incorrect because pico is a text editor, not a command to create a new file without opening it.

Option B) cat filename - This option is incorrect because cat is a command used to display the contents of a file, not create a new file.

Option C) more filename - This option is incorrect because more is a command used to view a file one screen at a time, not create a new file.

Option D) touch filename - This option is correct because the touch command is used to create a new file without opening it. It updates the access and modification timestamps of the file, and if the file does not exist, it creates an empty file with the specified name.

The correct answer is Option D.

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• Wrong explanation