“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（1）， 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（1） 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（1） Mastery today！

This edition uses feminine pronouns。 See the other edition for masculine pronouns。