Скачать или смотреть How to Add a New Line to a File in Bash on macOS

Learn how to use Bash scripts to add a new line to a file in macOS, specifically for disabling Spotify's autostart feature.
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This video is based on the question https://stackoverflow.com/q/66888940/ asked by the user 'Kevin' ( https://stackoverflow.com/u/11492882/ ) and on the answer https://stackoverflow.com/a/66889099/ provided by the user 'RavinderSingh13' ( https://stackoverflow.com/u/5866580/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Adding a New Line to a File in Bash on macOS

Are you tired of Spotify starting up automatically when you log into your macOS? You’re not alone! Many users have found that Spotify does not utilize the typical methods like Login Items or launchd to launch at startup. Fortunately, you can modify Spotify's preferences through a Bash script to disable this feature. Let's dive into how you can efficiently add a new line to Spotify's prefs file.

Understanding the Problem

Spotify has a configuration file located at:

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To prevent Spotify from launching at startup, you need to add the line:

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specifically after the line:

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Common Attempts and Their Shortcomings

You might think that using common command-line tools like sed or awk would solve your problem. Let’s take a look at each attempt and why it fell short:

Using sed Command:

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This results in an error because the syntax for sed requires proper escaping.

Using awk Command:

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This effectively prints out the contents correctly but does not modify the file as awk lacks an in-place editing option.

Both attempts illustrate common pitfalls, leaving you scratching your head without resulting changes in the target file.

The Solution

So how do we accomplish this? By using awk smartly, we can achieve the desired outcome! Below are two recommended approaches:

Command Structure

Basic Modification:
You can utilize the following awk command, which looks for the specific line and appends our desired line right after it:

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Alternative Modification:
This alternative also achieves the same results:

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Saving Changes

Once you are satisfied with the output displayed in the terminal, save the changes to the original file. You can do this by appending these commands:

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Full Command Example

Here’s how you would put this into action:

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This command finds the targeted line in the prefs file, inserts the new line, and overwrites the original file safely.

Conclusion

With this guide, you should have a clearer approach to modifying files through Bash scripts on macOS. By understanding and utilizing tools like awk, you can manage your preferences more effectively. Save time and keep your workspace running just the way you like it!

Got any more scripting questions? Don't hesitate to ask!