Let me be perfectly clear: ed(1) is the standard Unix text editor. If you don’t know ed, you’re not a sysadmin. You're a mere dabbler. A dilettante. Deficient.

Forty years after ed’s introduction, internationally acclaimed author Michael W Lucas has finally unlocked the mysteries of ed for everyone. With Ed Mastery, you too can become a proper sysadmin.

Ed Mastery will help you:
•understand buffers and addresses
•insert, remove, and mangle text
•master file management and shell escapes
•comprehend regular expressions, searches, and substitutions
•create high-performance scripts for transforming files

You must be at least this competent to use this computer. Read Ed Mastery today!