ex man page on 4.4BSD

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EX(1)			  BSD General Commands Manual			 EX(1)

     ex, edit — text editor

     ex [-] [-v] [-t tag] [-r] [[+command]] [-l] name ...
     edit [ex options]

     Ex is the root of a family of editors: edit, ex and vi.  Ex is a superset
     of ed, with the most notable extension being a display editing facility.
     Display based editing is the focus of vi(1) and requires a CRT.

     For users unfamiliar with ed(1), the editor edit is probably easier to
     learn.  It avoids some of the complexities of ex used mostly by systems
     programmers and persons comfortable with the ed(1) editor.

     The following documentation is found in the “UNIX User's Manual
     Supplementary Documents”:

     Edit: A tutorial provides a comprehensive introduction to edit assuming
     no previous knowledge of computers or the UNIX system.

     Ex Reference Manual - Version 3.7 is a comprehensive and complete manual
     for the command mode features of ex, but you cannot learn to use the edi‐
     tor by reading it.	 For an introduction to more advanced forms of editing
     using the command mode of ex see the editing documents written by Brian
     Kernighan for the editor ed(1); the material in the introductory and
     advanced documents works also with ex.

     An Introduction to Display Editing with Vi introduces the display editor
     vi(1) and provides reference material on vi(1).  In addition, the Vi
     Quick Reference card summarizes the commands of vi(1) in a useful, func‐
     tional way, and is useful with the introduction.

     The ex command uses the following environment variables.

     EXINIT   User specified startup values for ex.

     HOME     Default directory to search for the file ~/.exrc

     SHELL    Shell used for escaped commands (with the ! command).

     TERM     Terminal type.

     TERMCAP  Alternate termcap file.

     /usr/libexec/ex?.?strings	 error messages
     /usr/libexec/ex?.?recover	 recover command
     /usr/libexec/ex?.?preserve	 preserve command
     /usr/share/misc/termcap	 describes capabilities of terminals
     ~/.exrc			 editor startup file
     /tmp/Exnnnnn		 editor temporary
     /tmp/Rxnnnnn		 named buffer temporary
     /var/preserve		 preservation directory

     awk(1), ed(1), grep(1), sed(1), grep(1), vi(1), termcap(5), environ(7)

     Ex appeared in 3BSD.

     The undo command causes all marks to be lost on lines changed and then
     restored if the marked lines were changed.

     Undo never clears the buffer modified condition.

     The z command prints a number of logical rather than physical lines.
     More than a screen full of output may result if long lines are present.

     File input/output errors don't print a name if the command line ‘-’
     option is used.

     There is no easy way to do a single scan ignoring case.

     The editor does not warn if text is placed in named buffers and not used
     before exiting the editor.

     Null characters are discarded in input files, and cannot appear in resul‐
     tant files.

4th Berkeley Distribution	 June 21, 1993	     4th Berkeley Distribution

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