home *** CD-ROM | disk | FTP | other *** search
-
- LHA v2.11 HELP GUIDE
-
- by Irv Hoff, cleared by Yoshi-san
-
- 3 March 1991
-
-
- LHA v2.11 - WHAT IS IT?
- -----------------------
-
- LHA v2.11 is a dual purpose archive program.
-
- 1) Its primary purpose is to take normal binary or text files
- and make them smaller in size. This saves great amounts of
- storage space, with typical results being approximately 1/4
- to 1/3 of original size. It can handle any size file that
- can be placed on the disk, together with the compressed file
- it then makes. Files in excess of 1 Mb may be easily used,
- even though perhaps only 200 Kb RAM might be available.
-
- This eliminates any potential problems from one computer to
- another.
-
- It does this with by using special "compression tables."
- These are automatically built into the program and involve
- mathematical procedures which are simple for a computer.
-
- 2) The secondary purpose is to take more than one of these
- programs and include them in just one file, although each
- will have its own individual name inside that file.
-
- This is called an "archive." In the days of
- CP/M, they were called "library" files. In the
- early days of MS-DOS (and other comparable pro-
- grams used by IBM computers) they were called
- .ARC files.
-
- However, as other comparable programs appeared,
- they were given various "extents" to identify
- the program used. Some sample names are .ARC,
- .DWC, .LZH, .PAK, .ZIP, .ZOO, etc.
-
- Each has its own special characteristics.
- Lists comparing the various programs are
- available.
-
-
- ARCHIVE FILES
- -------------
-
- LHA v2.11 can have hundreds of files in a single .LZH archive.
- This allows storing complete hard disk directories in a space
- typically 1/2 or less the original total - although many of the
- files might already be archived.
-
- One such check we tried, made a file we called "TEST.LZH." It
- had 200 files and was 41% the original directory size.
-
- Not only is this a great saving in size for storage, but puts
- (in this case), the 200 files into one, single file. This is
- often beneficial. Among other things, all files associated with
- one program are kept together in the same archive.
-
-
- ------------------------------------------------------------------------
-
- SIMPLE INSTRUCTIONS FOR USING LHA v2.11
- ---------------------------------------
-
- 1) To compress one file called ABC.TXT. (It will make a
- file called ABC.LZH.)
-
- 'a' LHA a ABC ABC.TXT
- or
- 'a' LHA a ABC.LZH ABC.TXT
- ^ ^ ^
- a b c
-
-
- a = command
- b = archive program name
- c = pgm (or pgms) to be added/compressed
-
-
- Either is suitable, one requires more typing.
-
- a) In this case, the "a" is called a command. There are
- 12 of those available (shown below). A few are dupli-
- cates to initially help users more familiar with other
- programs.
-
- Typing LHA <ret> will display this list on the screen.
- It also gives a very short summary what the command
- does.
-
-
- 2) ADDING a program to an existing file:
-
- 'a' LHA a ABC ABC.DOC
- ^
- archive name
-
-
- 3) ADDING SEVERAL files at one time:
-
- 'a' LHA a ABC PGM1.EXT PGM2.EXT PGM3.EXT
- ^
- archive name
-
-
- 4) DELETING a file called PGM4.EXT:
-
- 'd' LHA d ABC PGM4
- ^
- archive name
-
-
- 5) EXTRACTING a file called PGM4.EXT:
-
- 'e' (or 'x') LHA e ABC PGM4
- ^
- archive name
-
-
- 6) LOOKING at the archive contents:
-
- 'l' (or 'v') LHA l ABC PGM4
- ^
- archive name
-
-
- 7) MOVES files into archive and deletes file from directory:
-
- 'm' LHA m ABC PGM1 PGM2 PGM3
- ^
- archive name
-
-
- 8) DISPLAY a text file in an archive:
-
- 'p' LHA p ABC PGM4
- ^
- archive name
-
-
- 9) TEST the integrity of an archive:
-
- 't' LHA t ABC PGM4
- ^
- archive name
-
-
- NOTE: LHA.EXE makes both "long and short SFX files."
- Check the advanced .DOC file for information.
- It has a quite extensive discussion on the SFX
- files.
-
-
- COMMANDS:
- ---------
-
- There are 12 commands available.
-
- The 'l' and 'v' are very slightly different, the 'v' putting
- the file name on a line by itself.) The 'e' and 'x' are
- slightly different, as well.
-
- These are listed by typing just LHA without any command of
- file name:
-
- -------------------------------------------------------------------------------
-
- <command>
- a: Add files u: Update files m: Move files
- f: Freshen files d: Delete files p: disPlay files
- e: Extract files x: eXtract files with pathnames
- l: List of files v: View listing of files with pathnames
- s: make a Self-extracting archive t: Test the integrity of an archive
-
-
- OPTIONS
- -------
-
- There are 15 "options" which many users will not need/use.
- They will be explained in detail in the LHA211.DOC manual for
- advanced users. Those are:
-
-
- <option>
- r: Recursively collect files w: assign Work directory
- x: allow eXtended file names m: no Message for query
- p: distinguish full Path names c: skip time-stamp Check
- a: allow any Attributes of files z: Zero compression (only store)
- t: archive's Time-stamp option h: select Header level (default = 1)
- o: use Old compatible method n: display No indicator a/o pathname
- i: not Ignore lower case l: display Long name with indicator
- -: '-' or '@' as the first letter of filenames
- ===============================================================================
-
- - end -
-