The highlighting here:

> **The dynamic linker** then finishes **the linking task**

misses the important word, “**finishes**”. The linker, `ld`, starts the linking task, performing as much as possible at build-time and preparing the data structures required to finish it.

The loader can then finish the linking task as it loads the program and the libraries it needs: matching up symbols, and performing the necessary relocation.

In CSAPP’s terminology, the dynamic loader is the in-kernel ELF loader, and the dynamic linker is `ld-linux.so`.

The GNU C library’s own documentation refers to `ld.so` as [the dynamic linker/loader](https://man7.org/linux/man-pages/man8/ld.so.8.html).