What is the octal notation used for modifying permissions in Linux?

The correct choice demonstrates the concept of using symbolic notation to modify file permissions in Linux, which includes options like 'u' for user and 'g' for group. The command reflects how permissions can be managed by specifying what users or groups can do with a file.

In Linux, file permissions are commonly manipulated using both symbolic and numeric (octal) notation. While option C provides a symbolic representation, other choices illustrate numeric values that indicate permissions. For example, the octal notation is typically used to represent permissions in the form of three digits, where each digit corresponds to a specific set of permissions (read, write, execute) assigned to the owner, group, and others.

To clarify octal values:

• "chmod 777" grants full permissions (read, write, execute) to everyone.
• "chmod 644" provides read and write permissions to the owner and read-only permissions to the group and others.
• "chmod 455" assigns read and execute permissions for the owner, and read-only permissions for the group, with no permissions for others.

The symbolic method, represented by "chmod ug", allows more granular permission setting by indicating which users or groups have certain permissions, making it a versatile option for modifying file access controls without