vigr is a command used to edit the group file in Unix-like operating systems. The group file contains information about each group on the system, such as the group name and the list of users who are members of the group. By using vigr, you can edit this file and make modifications to the group settings.

Use case 1: Edit the group file

Code:

vigr

Motivation: The vigr command is used when you want to edit the group file directly. This can be useful in scenarios where you need to add or remove a user from a specific group, change the group name, or make any other modifications to the group settings.

Explanation: The vigr command opens the group file in your default text editor, allowing you to make changes to its contents. It uses the system’s default editor, as specified by the EDITOR environment variable. If EDITOR is not set, vigr will use the vi editor by default.

Example Output: With the vigr command, the group file will open in your text editor, displaying the current group settings. You can then make your desired modifications and save the file to apply the changes.

Use case 2: Display version

Code:

vigr --version

Motivation: Sometimes, you may need to check the version of the vigr command installed on your system. This can be helpful for troubleshooting purposes or when you want to ensure you have the latest version with all the bug fixes and enhancements.

Explanation: When you run vigr with the --version option, it displays the version information of the command. This typically includes the command name and the version number.

Example Output: Running vigr --version might produce output similar to the following:

vigr (GNU coreutils) 8.30
Packaged by David Binetti
...

Conclusion:

The vigr command is a powerful tool for editing the group file in Unix-like systems. By using this command, you can make changes to group settings, such as adding or removing users from groups, changing group names, or modifying group permissions. Additionally, you can check the version of vigr installed on your system to ensure you have the latest updates.