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learn(1) [bsd man page]

LEARN(1)						      General Commands Manual							  LEARN(1)

learn - computer aided instruction about UNIX SYNOPSIS
learn [ -directory ] [ subject [ lesson ] ] DESCRIPTION
Learn gives Computer Aided Instruction courses and practice in the use of UNIX, the C Shell, and the Berkeley text editors. To get started simply type learn. If you had used learn before and left your last session without completing a subject, the program will use information in $HOME/.learnrc to start you up in the same place you left off. Your first time through, learn will ask questions to find out what you want to do. Some questions may be bypassed by naming a subject, and more yet by naming a lesson. You may enter the lesson as a number that learn gave you in a previous session. If you do not know the lesson number, you may enter the lesson as a word, and learn will look for the first lesson containing it. If the lesson is `-', learn prompts for each lesson; this is useful for debugging. The subject's presently handled are files editor vi morefiles macros eqn C There are a few special commands. The command `bye' terminates a learn session and `where' tells you of your progress, with `where m' telling you more. The command `again' re-displays the text of the lesson and `again lesson' lets you review lesson. There is no way for learn to tell you the answers it expects in English, however, the command `hint' prints the last part of the lesson script used to evaluate a response, while `hint m' prints the whole lesson script. This is useful for debugging lessons and might possibly give you an idea about what it expects. The -directory option allows one to exercise a script in a nonstandard place. FILES
/usr/share/learn subtree for all dependent directories and files /usr/tmp/pl* playpen directories $HOME/.learnrc startup information SEE ALSO
csh(1), ex(1) B. W. Kernighan and M. E. Lesk, LEARN - Computer-Aided Instruction on UNIX BUGS
The main strength of learn, that it asks the student to use the real UNIX, also makes possible baffling mistakes. It is helpful, espe- cially for nonprogrammers, to have a UNIX initiate near at hand during the first sessions. Occasionally lessons are incorrect, sometimes because the local version of a command operates in a non-standard way. Occasionally a lesson script does not recognize all the different correct responses, in which case the `hint' command may be useful. Such lessons may be skipped with the `skip' command, but it takes some sophistication to recognize the situation. To find a lesson given as a word, learn does a simple fgrep(1) through the lessons. It is unclear whether this sort of subject indexing is better than none. Spawning a new shell is required for each of many user and internal functions. The `vi' lessons are provided separately from the others. To use them see your system administrator. 7th Edition October 22, 1996 LEARN(1)

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EX(1)							      General Commands Manual							     EX(1)

ex, edit - text editor SYNOPSIS
ex [ - ] [ -v ] [ -t tag ] [ -r ] [ +command ] [ -l ] name ... edit [ ex options ] DESCRIPTION
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. If you have not used ed, or are a casual user, you will find that the editor edit is convenient for you. It avoids some of the complexi- ties of ex used mostly by systems programmers and persons very familiar with ed. If you have a CRT terminal, you may wish to use a display based editor; in this case see vi(1), which is a command which focuses on the display editing portion of ex. DOCUMENTATION
The document Edit: A tutorial (USD:14) provides a comprehensive introduction to edit assuming no previous knowledge of computers or the UNIX system. The Ex Reference Manual - Version 3.7 (USD:16) is a comprehensive and complete manual for the command mode features of ex, but you cannot learn to use the editor 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; the material in the introductory and advanced documents works also with ex. An Introduction to Display Editing with Vi (USD:15) introduces the display editor vi and provides reference material on vi. In addition, the Vi Quick Reference card summarizes the commands of vi in a useful, functional way, and is useful with the Introduction. FILES
/usr/share/misc/exstrings error messages /usr/libexec/exrecover recover command /usr/sbin/expreserve preserve command /etc/termcap describes capabilities of terminals ~/.exrc editor startup file /tmp/Exnnnnn editor temporary /tmp/Rxnnnnn named buffer temporary /usr/preserve preservation directory SEE ALSO
awk(1), ed(1), grep(1), sed(1), grep(1), vi(1), termcap(5), environ(7) AUTHOR
Originally written by William Joy Mark Horton has maintained the editor since version 2.7, adding macros, support for many unusual terminals, and other features such as word abbreviation mode. BUGS
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 resultant files. 4th Berkeley Distribution October 21, 1996 EX(1)
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