Library Unistd H Site

: Checks if a file descriptor is actually a terminal (useful for deciding if you should print colorful text). ⚠️ Pro-Tip: Portability

: Finds the "Current Working Directory" (where your program is sitting right now). Library Unistd H

: Pauses execution for seconds or microseconds. : Checks if a file descriptor is actually

: Replaces the current process image with a new one (how your terminal launches other apps). getpid() : Tells the program its own unique process ID. ⏱️ System & Time Library Unistd H

: The rawest way to move data between your program and a file or socket.