Small errors on LFS201 course
The 11.12.d knowledge check shows check boxes, but the only good answer is "all of the above" as if they were radio buttons. It's not consistent.
In 13.6.b, the vmstat "bi" and "bo" meanings are inverted. It should be "read from" for "bi" and "written to" for "bo". At least, it's what the man page says (bi: Blocks received from a block device).