On Linux and other Unix-based operating systems, sudo is used to run a program with the privileges of another user, often root. When we need to modify a file which requires administrative privileges to be edited, if we launch our favorite text editor directly with sudo, it will run without the customization and settings we use when we invoke it normally, since the environment of the invoking user is not preserved. In this tutorial we will see how can we easily solve this problem and how we can modify system files securely by using sudoedit.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-edit-a-system-file-with-sudoedit-preserving-the-invoking-user-environment