“I’m glad someone’s finally giving ed the attention it deserves.”

– Ken Thompson, co-creator of Unix

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!