Understanding Disabling Done Messages in Shell Scripts
In this article, we will discuss how to disable the "Done" message that appears in the terminal after executing a shell script. This is a common question among Unix and Linux users, and the answer is simple. We will also cover some key concepts related to this topic, such as the difference between a profile and a bashrc file, and how to use them to customize your shell environment.
Why Disable Done Messages?
When you run a shell script, the terminal displays a "Done" message after the script has finished executing. This message can be useful in some cases, but it can also be annoying if you are running many scripts in quick succession. By disabling the "Done" message, you can keep your terminal output clean and easy to read.
How to Disable Done Messages
To disable the "Done" message in a shell script, you can use the set +m command at the beginning of the script. This command disables the monitoring of background jobs, which is what causes the "Done" message to be displayed. Here is an example:
#!/bin/bash
set +m
# Your script goes here
Alternatively, you can add the set +m command to your profile or bashrc file to disable the "Done" message for all shell scripts. We will discuss how to do this in the next section.
Profile vs Bashrc
A profile is a script that runs automatically when you log in to your Unix or Linux system. It is typically used to set environment variables and configure your shell environment. A bashrc file, on the other hand, is a script that runs automatically every time you start a new bash shell. It is typically used to set shell options and configure shell behavior.
In general, you should use your profile to set environment variables and configure your shell environment for your entire login session. You should use your bashrc file to set shell options and configure shell behavior for individual shells. However, the distinction between the two is not always clear-cut, and you can use either file for either purpose.
Adding set +m to Your Profile or Bashrc File
To add the set +m command to your profile or bashrc file, you can use a text editor such as nano or vim. Here is an example of how to do this using nano:
nano ~/.bashrc
This will open your bashrc file in the nano text editor. You can then add the set +m command to the end of the file, save your changes, and exit the editor.
After adding the set +m command to your profile or bashrc file, all new shell scripts will run without displaying the "Done" message. However, this change will not affect existing shell scripts. To disable the "Done" message for existing shell scripts, you will need to modify them individually.
- Disabling the "Done" message in shell scripts can help keep your terminal output clean and easy to read.
- To disable the "Done" message, use the
set +mcommand at the beginning of your script. - You can also add the
set +mcommand to your profile or bashrc file to disable the "Done" message for all shell scripts. - The difference between a profile and a bashrc file is not always clear-cut, but in general, you should use your profile to set environment variables and configure your shell environment for your entire login session, and you should use your bashrc file to set shell options and configure shell behavior for individual shells.