Instruct: Classify Amazon reviews into positive or negative sentiment
Query: uneven and contains errors

this book starts out promising but the technical info has bad problems. the description of password authentication (p.106) says your login password protects your rsa key, which is flat wrong. some sample commands are plain wrong, like running scp without a destination (p.104) or scp2 with a command on the end which isn't legal (p.160 last line). ssh-keygen is ignored for th first 200 pages, authorized_keys options are not covered period (like "command="). some writing is just confused, like "server keys are what the secure shell daemon uses to recognize that the secure shell server daemon is running". (p.195) i found dozens of more examples. not recommended.