From Free Knowledge Base- The DUCK Project: information for everyone
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=== ed ===An editor for UNIX written in PDP-11/20 assembler in 1971 by Ken Thompson. Now there is GUN-ed for Linux. ed is a line-oriented text editor. It is used to create, display, modify and otherwise manipulate text files. red is a restricted ed: it can only edit files in the current directory and cannot execute shell commands. === nvi ===