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: o understand buffers and addresses o insert, remove, and mangle text o master file management and shell escapes o comprehend regular expressions, searches, and substitutions o create high-performance scripts for transforming files You must be at least this competent to use this computer. Read Ed Mastery today!