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A comprehensive walkthrough of GNU coreutils commands in alphabetical order, covering utilities from `[` and `test` through `pr`. Each command gets a practical explanation with real examples, including lesser-known tools like `csplit`, `mkfifo`, `numfmt`, `join`, and `mknod`. Notable highlights include a deep dive into `chroot` with bind mounts, a case for using `cp` instead of `dd` for writing ISOs, and candid opinions on which tools are useful versus obsolete.