Title: Optimistic Approach to File Permission Modification

Question:

How can we remove the SUID and SGID from specific files while maintaining their original permissions?

Answer:

To remove the SUID from the specified files, use the following commands:

1. sudo chmod u-s /usr/bin/gpasswd

2. sudo chmod u-s /usr/bin/newgrp

To remove the SGID from the specified files, use the following commands:

1. sudo chmod g-s /usr/bin/wall

2. sudo chmod g-s /usr/bin/write

Explanation: The `chmod` command plays a crucial role in modifying file permissions. By using the flags `u-s` and `g-s`, we can successfully eliminate the setuid (SUID) and setgid (SGID) bits from the specified files, respectively.

The assigned commands precisely target the files located in the `/usr/bin/` directory. It is vital to understand that the SUID and SGID bits serve to enhance a process's permissions to that of the file owner or group owner during the execution phase.

However, by removing these bits through the provided commands, we effectively prevent the execution of the files with escalated privileges. The beauty of the commands lies in the fact that they retain the original permissions of the files while eliminating the specified bits.