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- *** Pirate Magazine Issue IV / File 4 of 10 ***
- *** >Zipping and Archiving< ***
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- Swapping warez requires considerable zipping, unzipping, and rezipping, and we
- offer the following tips to help assure that we get the most out of our ZIP
- programs and procedures. ALthough most boards will accept any reputable
- compression, there's not much disagreement on which compression method is the
- best: Phil Katz's PKZIP is the standard. It's fast, tight, and offers many
- options. Although some, such as ICE 1.14, may have higher compression ratios,
- no other program has the all around power and utility as PKware.
- Unfortunately, too many warez hobbyists don't use PKZIP to it's full potential,
- and this can result in lost files, confused archives, or incomplete files on
- uploading. We offer the following tips to improve zipping procedures.
-
- 1. Always zip from the original disks or programs when possible rather then do
- a file dump and then rezip. In a file dump, it is easy to forget to include
- subdirectories.
-
- 2. *ALWAYS* put a zip comment in each zip file so you (or others) know what
- that file is. If you are zipping up a program called "LAWRITE" that has 6
- disks, with the first being the program disk, type this command:
- PKZIP LRT21-1 (for "Law Rite, ver. 2.1, disk 1). Then, type: PKZIP -Z
- LRT21-1 (this will allow a zip comment) and type at the prompt something
- like: "LAWRITE BY MACON, VER. 2.1, PROGRAM DISK (1/6). This lets you (or
- whoever) know what the program is, what the disk is should the installation
- procedure ask for the specific disk, and give you the version so it won't
- be confused with an upgrade.
-
- 3. Experienced hobbyists keep their backup zip files as they come
- off the disk, and this means *KEEPING SUBDIRECTORIES INTACT AND SEPARATE FROM
- OTHER FILES.** There are two ways to do this. The first is to INSTALL a
- complete program, including all options, so a complete program exists on hard
- disk. Then, we go into each subdirectory and zip the files. For example, if
- LAWRITE has a main directory called LAWRITE and three subdirectories called a)
- FILES, b) LAW, and c) DICTNRY, you first go into each of the three
- subdirectories and zip the the files with the command: PKZIP -M FILES (or LAW
- or DICTNRY). This will zip all the files in that directory and remove them
- after zipping. This saves the need to delete files individually. THEN: Go into
- the LAWRITE directory and type the command:
- PKZIP -m -P -r LRT21 (note lower case m & r and UPPER case P)
- This will zip the entire program, Law Rite 2.1. The -m command
- removes individual files, the -P switch retains the file's original
- path, and the -r recurses the subdirectories. For a helpful article on
- this, even for experienced users, see Steven J. Vaughan-Nichols:
- "Zippity PKzip" in PC COMPUTING, Feb., 1990 (p. 96-99).
-
- When finished, you should have one main zip file that contains all the files
- from the LAWRITE directory and three additional zip files from the three
- subdirectories. BE SURE TO ADD A "README.NOW" note and explain that, when
- unzipping, these directories and subdirectories should be created, unzipped in
- the LAWRITE directory (with the PKUNZIP command). If you have a large program
- with several zip files in it (ALWAYS RUN THE PKUNZIP -v *.zip command to see
- what's in a zip file before unzipping), you might first create subdirectoriese
- named after those zip files just to be safe, and keep your fingers crossed that
- whoever zipped it knew what they were doing. That's why it is crucial to name
- those other zip files exactly as the subdirectory appears.
-
- The disadvantage of this kind of zipping for hobbyists is that when unzipping,
- the files will be from an installed program and not the original disk. This
- means that if unzipped on a different computer, some needed files may be
- missing. Besides, it's always helpful to have a second backup that
- doesn't take much space that is complete. That's why we prefer
- to keep zips off the original disks, because you never know what
- kind of system it will be unzipped on, and installation programs
- rarely copy over all files, but only those needed during the
- initial configuration.
-
- We suggest creating a test directory with a few subdirectories and placed some
- short, unneeded files in them and then spending an hour practicing with the
- PKzip/UNzip commands until you are familiar with them. You might also consider
- experimenting with various batch commands, and use wildcards to create an
- auto-zip program that saves typing time.
-
- There have been reports that ICE 1.14 is a hacked version of LHarc, but this
- does not appear true. A nice summary of other compression programs appeared in
- PC COMPUTING (see above):
-
- ----------
- FOUR OTHER DATA COMPRESSORS PKzip stands above other data-compression shareware
- in terms of overall performance. Here are some more very popular utilities:
-
- ARC 5.02. Long the industry standard, Arc 6.02 has deteriorated into a
- middle-of-the-road performer in terms of speed and compression ratios. It has
- the bad habit of aborting a job and leaving a file half-compressed if it
- doesn't have enough disk space to complete the operation....
-
- ICE .14. One of the newest entries in the data-compression arena, Ice (also
- known as LHarc) emerged as a popular shareware program in Japan. It has the
- highest compression ratio of any program mentioned here, but it's painfully
- slow--and very difficult to use, in part because of its limited documentation.
- Ice .14 is currently available on GEnie.
-
- PAK 2.1. Though it's been around for a while, Pak has never had the prominence
- of either Arc or PKzip, mostly because its performance lags behind that of the
- other two programs. Pak excels at handling multiple file specifications and can
- create and convert files read by Arc.
-
- Zoo 2.01. Neither the fastest nor the most efficient compression utility
- available, Zoo offers some advantages. This shareware program allows you to
- selectively extract multiple generations of the same file--a terrific feature
- for programmers and writers. It also spans several operating systems, including
- Xenix, VAX/VMS, and Amiga DOS, so that you can archive files across platforms.
- It's a difficult program to master, and the documentation isn't much help in
- figuring it out.
-
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