Cool book!

Humble suggestion: Give more specific examples of what the reader will learn on the landing page. From the landing page, I don't know if this is for total command line beginners or has helpful tips for people familiar with bash already. I had to hunt around to find sample pages, and they provided much better sense of what's in the book.

Also, spotted some small issues in the copy:

"Fresh out of press" - The more common expression is "hot off the press." "Out of press" sounds similar to "out of print" (i.e., no longer sold)

"Grok the Linux command line on only 120 pages" - should be "in only 120 pages"