What is the correct statement describing the normal location of certain files in a POSIX system?
The correct statement describing the normal location of certain files in a POSIX system is that /bin contains executable programs. /usr contains folders that can be written to by normal (non-root) users. /etc contains system-wide configuration files.
Understanding POSIX in Operating Systems
POSIX (Portable Operating System Interface) is a standard specification that defines the API (Application Programming Interface) of the operating system and the environment interface. It is the name given to the family of standards specified by the IEEE (Institute of Electrical and Electronics Engineers) to define operating systems compatibility. The standard is intended to be applied to all operating systems such as Unix and Windows, which can meet the requirements of the standard.
In a POSIX system, the normal location of certain files are as follows:
/bin
The /bin directory contains the executable binary programs. These programs are generally available to all users and can be executed by them.
/usr
The /usr directory contains programs, libraries, and data files that are not required for the system to boot or run correctly but are used by the system's users. Non-root users may write to some directories within /usr.
/etc
This directory contains system-wide configuration files that control the system's behavior. Only root may write to this directory.
Therefore, the correct statement describing the normal location of certain files in a POSIX system is that /bin contains executable programs, /usr contains folders that can be written to by normal (non-root) users, and /etc contains system-wide configuration files.