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1.1 root 1: Info file gzip.info, produced by Makeinfo, -*- Text -*- from input
2: file gzip.texi.
3:
4: This file documents the the GNU `gzip' command for compressing
5: files.
6:
7: Copyright (C) 1992-1993 Jean-loup Gailly
8:
9: Permission is granted to make and distribute verbatim copies of
10: this manual provided the copyright notice and this permission notice
11: are preserved on all copies.
12:
13: Permission is granted to copy and distribute modified versions of
14: this manual under the conditions for verbatim copying, provided that
15: the entire resulting derived work is distributed under the terms of a
16: permission notice identical to this one.
17:
18: Permission is granted to copy and distribute translations of this
19: manual into another language, under the above conditions for modified
20: versions, except that this permission notice may be stated in a
21: translation approved by the Foundation.
22:
23:
24: File: gzip.info, Node: Top, Up: (dir)
25:
26: This file documents the `gzip' command to compress files.
27:
28: * Menu:
29:
30: * Copying:: How you can copy and share `gzip'.
31: * Overview:: Preliminary information.
32: * Sample:: Sample output from `gzip'.
33: * Invoking gzip:: How to run `gzip'.
34: * Advanced usage:: Concatenated files.
35: * Environment:: The `GZIP' environment variable
36: * Problems:: Reporting bugs.
37: * Concept Index:: Index of concepts.
38:
39:
40: File: gzip.info, Node: Copying, Next: Overview, Up: Top
41:
42: GNU GENERAL PUBLIC LICENSE
43: **************************
44:
45: Version 2, June 1991
46:
47: Copyright (C) 1989, 1991 Free Software Foundation, Inc.
48: 675 Mass Ave, Cambridge, MA 02139, USA
49:
50: Everyone is permitted to copy and distribute verbatim copies
51: of this license document, but changing it is not allowed.
52:
53: Preamble
54: ========
55:
56: The licenses for most software are designed to take away your
57: freedom to share and change it. By contrast, the GNU General Public
58: License is intended to guarantee your freedom to share and change free
59: software--to make sure the software is free for all its users. This
60: General Public License applies to most of the Free Software
61: Foundation's software and to any other program whose authors commit to
62: using it. (Some other Free Software Foundation software is covered by
63: the GNU Library General Public License instead.) You can apply it to
64: your programs, too.
65:
66: When we speak of free software, we are referring to freedom, not
67: price. Our General Public Licenses are designed to make sure that you
68: have the freedom to distribute copies of free software (and charge for
69: this service if you wish), that you receive source code or can get it
70: if you want it, that you can change the software or use pieces of it
71: in new free programs; and that you know you can do these things.
72:
73: To protect your rights, we need to make restrictions that forbid
74: anyone to deny you these rights or to ask you to surrender the rights.
75: These restrictions translate to certain responsibilities for you if you
76: distribute copies of the software, or if you modify it.
77:
78: For example, if you distribute copies of such a program, whether
79: gratis or for a fee, you must give the recipients all the rights that
80: you have. You must make sure that they, too, receive or can get the
81: source code. And you must show them these terms so they know their
82: rights.
83:
84: We protect your rights with two steps: (1) copyright the software,
85: and (2) offer you this license which gives you legal permission to
86: copy, distribute and/or modify the software.
87:
88: Also, for each author's protection and ours, we want to make certain
89: that everyone understands that there is no warranty for this free
90: software. If the software is modified by someone else and passed on,
91: we want its recipients to know that what they have is not the
92: original, so that any problems introduced by others will not reflect
93: on the original authors' reputations.
94:
95: Finally, any free program is threatened constantly by software
96: patents. We wish to avoid the danger that redistributors of a free
97: program will individually obtain patent licenses, in effect making the
98: program proprietary. To prevent this, we have made it clear that any
99: patent must be licensed for everyone's free use or not licensed at all.
100:
101: The precise terms and conditions for copying, distribution and
102: modification follow.
103:
104: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
105:
106: 1. This License applies to any program or other work which contains
107: a notice placed by the copyright holder saying it may be
108: distributed under the terms of this General Public License. The
109: "Program", below, refers to any such program or work, and a "work
110: based on the Program" means either the Program or any derivative
111: work under copyright law: that is to say, a work containing the
112: Program or a portion of it, either verbatim or with modifications
113: and/or translated into another language. (Hereinafter,
114: translation is included without limitation in the term
115: "modification".) Each licensee is addressed as "you".
116:
117: Activities other than copying, distribution and modification
118: are not covered by this License; they are outside its scope. The
119: act of running the Program is not restricted, and the output from
120: the Program is covered only if its contents constitute a work
121: based on the Program (independent of having been made by running
122: the Program). Whether that is true depends on what the Program
123: does.
124:
125: 2. You may copy and distribute verbatim copies of the Program's
126: source code as you receive it, in any medium, provided that you
127: conspicuously and appropriately publish on each copy an
128: appropriate copyright notice and disclaimer of warranty; keep
129: intact all the notices that refer to this License and to the
130: absence of any warranty; and give any other recipients of the
131: Program a copy of this License along with the Program.
132:
133: You may charge a fee for the physical act of transferring a
134: copy, and you may at your option offer warranty protection in
135: exchange for a fee.
136:
137: 3. You may modify your copy or copies of the Program or any portion
138: of it, thus forming a work based on the Program, and copy and
139: distribute such modifications or work under the terms of Section 1
140: above, provided that you also meet all of these conditions:
141:
142: 1. You must cause the modified files to carry prominent notices
143: stating that you changed the files and the date of any
144: change.
145:
146: 2. You must cause any work that you distribute or publish, that
147: in whole or in part contains or is derived from the Program
148: or any part thereof, to be licensed as a whole at no charge
149: to all third parties under the terms of this License.
150:
151: 3. If the modified program normally reads commands interactively
152: when run, you must cause it, when started running for such
153: interactive use in the most ordinary way, to print or
154: display an announcement including an appropriate copyright
155: notice and a notice that there is no warranty (or else,
156: saying that you provide a warranty) and that users may
157: redistribute the program under these conditions, and telling
158: the user how to view a copy of this License. (Exception: if
159: the Program itself is interactive but does not normally
160: print such an announcement, your work based on the Program
161: is not required to print an announcement.)
162:
163: These requirements apply to the modified work as a whole. If
164: identifiable sections of that work are not derived from the
165: Program, and can be reasonably considered independent and
166: separate works in themselves, then this License, and its terms,
167: do not apply to those sections when you distribute them as
168: separate works. But when you distribute the same sections as
169: part of a whole which is a work based on the Program, the
170: distribution of the whole must be on the terms of this License,
171: whose permissions for other licensees extend to the entire whole,
172: and thus to each and every part regardless of who wrote it.
173:
174: Thus, it is not the intent of this section to claim rights or
175: contest your rights to work written entirely by you; rather, the
176: intent is to exercise the right to control the distribution of
177: derivative or collective works based on the Program.
178:
179: In addition, mere aggregation of another work not based on the
180: Program with the Program (or with a work based on the Program) on
181: a volume of a storage or distribution medium does not bring the
182: other work under the scope of this License.
183:
184: 4. You may copy and distribute the Program (or a work based on it,
185: under Section 2) in object code or executable form under the
186: terms of Sections 1 and 2 above provided that you also do one of
187: the following:
188:
189: 1. Accompany it with the complete corresponding machine-readable
190: source code, which must be distributed under the terms of
191: Sections 1 and 2 above on a medium customarily used for
192: software interchange; or,
193:
194: 2. Accompany it with a written offer, valid for at least three
195: years, to give any third party, for a charge no more than
196: your cost of physically performing source distribution, a
197: complete machine-readable copy of the corresponding source
198: code, to be distributed under the terms of Sections 1 and 2
199: above on a medium customarily used for software interchange;
200: or,
201:
202: 3. Accompany it with the information you received as to the
203: offer to distribute corresponding source code. (This
204: alternative is allowed only for noncommercial distribution
205: and only if you received the program in object code or
206: executable form with such an offer, in accord with
207: Subsection b above.)
208:
209: The source code for a work means the preferred form of the
210: work for making modifications to it. For an executable work,
211: complete source code means all the source code for all modules it
212: contains, plus any associated interface definition files, plus
213: the scripts used to control compilation and installation of the
214: executable. However, as a special exception, the source code
215: distributed need not include anything that is normally
216: distributed (in either source or binary form) with the major
217: components (compiler, kernel, and so on) of the operating system
218: on which the executable runs, unless that component itself
219: accompanies the executable.
220:
221: If distribution of executable or object code is made by
222: offering access to copy from a designated place, then offering
223: equivalent access to copy the source code from the same place
224: counts as distribution of the source code, even though third
225: parties are not compelled to copy the source along with the
226: object code.
227:
228: 5. You may not copy, modify, sublicense, or distribute the Program
229: except as expressly provided under this License. Any attempt
230: otherwise to copy, modify, sublicense or distribute the Program is
231: void, and will automatically terminate your rights under this
232: License. However, parties who have received copies, or rights,
233: from you under this License will not have their licenses
234: terminated so long as such parties remain in full compliance.
235:
236: 6. You are not required to accept this License, since you have not
237: signed it. However, nothing else grants you permission to modify
238: or distribute the Program or its derivative works. These actions
239: are prohibited by law if you do not accept this License.
240: Therefore, by modifying or distributing the Program (or any work
241: based on the Program), you indicate your acceptance of this
242: License to do so, and all its terms and conditions for copying,
243: distributing or modifying the Program or works based on it.
244:
245: 7. Each time you redistribute the Program (or any work based on the
246: Program), the recipient automatically receives a license from the
247: original licensor to copy, distribute or modify the Program
248: subject to these terms and conditions. You may not impose any
249: further restrictions on the recipients' exercise of the rights
250: granted herein. You are not responsible for enforcing compliance
251: by third parties to this License.
252:
253: 8. If, as a consequence of a court judgment or allegation of patent
254: infringement or for any other reason (not limited to patent
255: issues), conditions are imposed on you (whether by court order,
256: agreement or otherwise) that contradict the conditions of this
257: License, they do not excuse you from the conditions of this
258: License. If you cannot distribute so as to satisfy
259: simultaneously your obligations under this License and any other
260: pertinent obligations, then as a consequence you may not
261: distribute the Program at all. For example, if a patent license
262: would not permit royalty-free redistribution of the Program by
263: all those who receive copies directly or indirectly through you,
264: then the only way you could satisfy both it and this License
265: would be to refrain entirely from distribution of the Program.
266:
267: If any portion of this section is held invalid or
268: unenforceable under any particular circumstance, the balance of
269: the section is intended to apply and the section as a whole is
270: intended to apply in other circumstances.
271:
272: It is not the purpose of this section to induce you to
273: infringe any patents or other property right claims or to contest
274: validity of any such claims; this section has the sole purpose of
275: protecting the integrity of the free software distribution
276: system, which is implemented by public license practices. Many
277: people have made generous contributions to the wide range of
278: software distributed through that system in reliance on
279: consistent application of that system; it is up to the
280: author/donor to decide if he or she is willing to distribute
281: software through any other system and a licensee cannot impose
282: that choice.
283:
284: This section is intended to make thoroughly clear what is
285: believed to be a consequence of the rest of this License.
286:
287: 9. If the distribution and/or use of the Program is restricted in
288: certain countries either by patents or by copyrighted interfaces,
289: the original copyright holder who places the Program under this
290: License may add an explicit geographical distribution limitation
291: excluding those countries, so that distribution is permitted only
292: in or among countries not thus excluded. In such case, this
293: License incorporates the limitation as if written in the body of
294: this License.
295:
296: 10. The Free Software Foundation may publish revised and/or new
297: versions of the General Public License from time to time. Such
298: new versions will be similar in spirit to the present version,
299: but may differ in detail to address new problems or concerns.
300:
301: Each version is given a distinguishing version number. If the
302: Program specifies a version number of this License which applies
303: to it and "any later version", you have the option of following
304: the terms and conditions either of that version or of any later
305: version published by the Free Software Foundation. If the
306: Program does not specify a version number of this License, you
307: may choose any version ever published by the Free Software
308: Foundation.
309:
310: 11. If you wish to incorporate parts of the Program into other free
311: programs whose distribution conditions are different, write to
312: the author to ask for permission. For software which is
313: copyrighted by the Free Software Foundation, write to the Free
314: Software Foundation; we sometimes make exceptions for this. Our
315: decision will be guided by the two goals of preserving the free
316: status of all derivatives of our free software and of promoting
317: the sharing and reuse of software generally.
318:
319: NO WARRANTY
320:
321: 12. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
322: WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
323: LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
324: HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
325: WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT
326: NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
327: FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE
328: QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
329: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY
330: SERVICING, REPAIR OR CORRECTION.
331:
332: 13. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
333: WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY
334: MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE
335: LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
336: INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
337: INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS
338: OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
339: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH
340: ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN
341: ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
342:
343: END OF TERMS AND CONDITIONS
344:
345: How to Apply These Terms to Your New Programs
346: =============================================
347:
348: If you develop a new program, and you want it to be of the greatest
349: possible use to the public, the best way to achieve this is to make it
350: free software which everyone can redistribute and change under these
351: terms.
352:
353: To do so, attach the following notices to the program. It is safest
354: to attach them to the start of each source file to most effectively
355: convey the exclusion of warranty; and each file should have at least
356: the "copyright" line and a pointer to where the full notice is found.
357:
358: ONE LINE TO GIVE THE PROGRAM'S NAME AND AN IDEA OF WHAT IT DOES.
359: Copyright (C) 19YY NAME OF AUTHOR
360:
361: This program is free software; you can redistribute it and/or
362: modify it under the terms of the GNU General Public License
363: as published by the Free Software Foundation; either version 2
364: of the License, or (at your option) any later version.
365:
366: This program is distributed in the hope that it will be useful,
367: but WITHOUT ANY WARRANTY; without even the implied warranty of
368: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
369: GNU General Public License for more details.
370:
371: You should have received a copy of the GNU General Public License
372: along with this program; if not, write to the Free Software
373: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
374:
375: Also add information on how to contact you by electronic and paper
376: mail.
377:
378: If the program is interactive, make it output a short notice like
379: this when it starts in an interactive mode:
380:
381: Gnomovision version 69, Copyright (C) 19YY NAME OF AUTHOR
382: Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
383: type `show w'. This is free software, and you are welcome
384: to redistribute it under certain conditions; type `show c'
385: for details.
386:
387: The hypothetical commands `show w' and `show c' should show the
388: appropriate parts of the General Public License. Of course, the
389: commands you use may be called something other than `show w' and `show
390: c'; they could even be mouse-clicks or menu items--whatever suits your
391: program.
392:
393: You should also get your employer (if you work as a programmer) or
394: your school, if any, to sign a "copyright disclaimer" for the program,
395: if necessary. Here is a sample; alter the names:
396:
397: Yoyodyne, Inc., hereby disclaims all copyright
398: interest in the program `Gnomovision'
399: (which makes passes at compilers) written
400: by James Hacker.
401:
402: SIGNATURE OF TY COON, 1 April 1989
403: Ty Coon, President of Vice
404:
405: This General Public License does not permit incorporating your
406: program into proprietary programs. If your program is a subroutine
407: library, you may consider it more useful to permit linking proprietary
408: applications with the library. If this is what you want to do, use
409: the GNU Library General Public License instead of this License.
410:
411:
412: File: gzip.info, Node: Overview, Next: Sample, Prev: Copying, Up: Top
413:
414: Overview
415: ********
416:
417: `Gzip' reduces the size of the named files using Lempel-Ziv coding
418: (LZ77). Whenever possible, each file is replaced by one with the
419: extension ".z", while keeping the same ownership modes, access and
420: modification times. (The extension is "-z" for VMS, "z" for MSDOS,
421: OS/2 and Atari.) If no files are specified, the standard input is
422: compressed to the standard output. If the new file name is too long,
423: `gzip' truncates it and keeps the original file name in the compressed
424: file. `gzip' will only attempt to compress regular files. In
425: particular, it will ignore symbolic links.
426:
427: Compressed files can be restored to their original form using
428: "`gzip' -d" or `gunzip' or `zcat'.
429:
430: `gunzip' takes a list of files on its command line and replaces
431: each file whose name ends with ".z" or ".Z" and which begins with the
432: correct magic number with an uncompressed file without the original
433: extension. `gunzip' also recognizes the special extensions ".tgz" and
434: ".taz" as shorthands for ".tar.z" or ".tar.Z".
435:
436: `gunzip' can currently decompress files created by `gzip', `zip',
437: `compress' or `pack'. The detection of the input format is automatic.
438: When using the first two formats, `gunzip' checks a 32 bit CRC (cyclic
439: redundancy check). For `pack', `gunzip' checks the uncompressed
440: length. The `compress' format was not designed to allow consistency
441: checks. However `gunzip' is sometimes able to detect a bad .Z file. If
442: you get an error when uncompressing a .Z file, do not assume that the
443: .Z file is correct simply because the standard `uncompress' does not
444: complain. This generally means that the standard `uncompress' does
445: not check its input, and happily generates garbage output.
446:
447: Files created by `zip' can be uncompressed by `gzip' only if they
448: have a single member compressed with the 'deflation' method. This
449: feature is only intended to help conversion of `tar.zip' files to the
450: `tar.z' format. To extract `zip' files with several members, use
451: `unzip' instead of `gunzip'.
452:
453: `zcat' is identical to "`gunzip' -c". `zcat' uncompresses either a
454: list of files on the command line or its standard input and writes the
455: uncompressed data on standard output. `zcat' will uncompress files
456: that have the correct magic number whether they have a ".z" suffix or
457: not.
458:
459: `gzip' uses the Lempel-Ziv algorithm used in `zip' and PKZIP. The
460: amount of compression obtained depends on the size of the input and
461: the distribution of common substrings. Typically, text such as source
462: code or English is reduced by 60-70%. Compression is generally much
463: better than that achieved by LZW (as used in `compress'), Huffman
464: coding (as used in `pack'), or adaptive Huffman coding (`compact').
465:
466: Compression is always performed, even if the compressed file is
467: slightly larger than the original. The worst case expansion is a few
468: bytes for the gzip file header, plus 5 bytes every 32K block, or an
469: expansion ratio of 0.015% for large files. `gzip' preserves the mode,
470: ownership and timestamps of files when compressing or decompressing.
471:
472:
473: File: gzip.info, Node: Sample, Next: Invoking gzip, Prev: Overview, Up: Top
474:
475: Sample Output
476: *************
477:
478: Here are some realistic examples of running `gzip'.
479:
480: This is the output of the command `gzip':
481:
482: usage: gzip [-cdfhLrv19] [file ...]
483: For more help, type: gzip -h
484:
485: This is the output of the command `gzip -h':
486:
487: gzip 1.0.5 (4 Mar 93)
488: usage: gzip [-cdfhLrtvV19] [file ...]
489: -c --stdout write on standard output, keep original files unchanged
490: -d --decompress decompress
491: -f --force force overwrite of output file and compress links
492: -h --help give this help
493: -L --license display software license
494: -q --quiet suppress all warnings
495: -r --recurse recurse through directories
496: -t --test test compressed file integrity (implies -d)
497: -v --verbose verbose mode
498: -V --version display version number
499: -1 --fast compress faster
500: -9 --best compress better
501: file... files to (de)compress. If none given, use standard input
502:
503: This is the output of the command `gzip -v gzip.c':
504:
505: gzip.c: 69.8% -- replaced with gzip.c.z
506:
507:
508: File: gzip.info, Node: Invoking gzip, Next: Advanced usage, Prev: Sample, Up: Top
509:
510: Invoking `gzip'
511: ***************
512:
513: The format for running the `gzip' program is:
514:
515: gzip OPTION ...
516:
517: `gzip' supports the following options:
518:
519: `--help'
520: `-h'
521: Print an informative help message describing the options.
522:
523: `--stdout'
524: `-c'
525: Write output on standard output; keep original files unchanged.
526: If there are several input files, the output consists of a
527: sequence of independently compressed members. To obtain better
528: compression, concatenate all input files before compressing them.
529:
530: `--decompress'
531: `-d'
532: Decompress.
533:
534: `--force'
535: `-f'
536: Force compression or decompression even if the file has multiple
537: links or the corresponding file already exists. If -f is not
538: given, and when not running in the background, `gzip' prompts to
539: verify whether an existing file should be overwritten.
540:
541: `--help'
542: `-h'
543: Display a help screen.
544:
545: `--license'
546: `-L'
547: Display the `gzip' license.
548:
549: `--recurse'
550: `-r'
551: Travel the directory structure recursively. If any of the file
552: names specified on the command line are directories, `gzip' will
553: descend into the directory and compress all the files it finds
554: there (or decompress them in the case of `gunzip').
555:
556: `--test'
557: `-t'
558: Test. Check the compressed file integrity.
559:
560: `--verbose'
561: `-v'
562: Verbose. Display the name and percentage reduction for each file
563: compressed.
564:
565: `--version'
566: `-V'
567: Version. Display the version number and compilation options.
568:
569: `--fast'
570: `--best'
571: `-#'
572: Regulate the speed of compression using the specified digit #,
573: where -1 or --fast indicates the fastest compression method (less
574: compression) and --best or -9 indicates the slowest compression
575: method (optimal compression). The default compression level is
576: -5.
577:
578:
579: File: gzip.info, Node: Advanced usage, Next: Environment, Prev: Invoking gzip, Up: Top
580:
581: Advanced usage
582: **************
583:
584: Multiple compressed files can be concatenated. In this case,
585: `gunzip' will extract all members at once. If one member is damaged,
586: other members might still be recovered after removal of the damaged
587: member. Better compression can be usually obtained if all members are
588: decompressed then recompressed in a single step.
589:
590: This is an example of concatenating gzip files:
591:
592: gzip -c file1 > foo.z
593: gzip -c file2 >> foo.z
594:
595: Then
596:
597: gunzip -c foo
598:
599: is equivalent to
600:
601: cat file1 file2
602:
603: In case of damage to one member of a .z file, other members can
604: still be recovered (if the damaged member is removed). However, you
605: can get better compression by compressing all members at once:
606:
607: cat file1 file2 | gzip > foo.z
608:
609: compresses better than
610:
611: gzip -c file1 file2 > foo.z
612:
613: If you want to recompress concatenated files to get better
614: compression, do:
615:
616: zcat old.z | gzip > new.z
617:
618:
619: File: gzip.info, Node: Environment, Next: Problems, Prev: Advanced usage, Up: Top
620:
621: Environment
622: ***********
623:
624: The environment variable `GZIP' can hold a set of default options
625: for gzip. These options are interpreted first and can be ovewritten by
626: explicit command line parameters. For example:
627:
628: for sh: GZIP="-8 -v"; export GZIP
629: for csh: setenv GZIP "-8 -v"
630: for MSDOS: set GZIP=-8 -v
631:
632: On Vax/VMS, the name of the environment variable is `GZIP_OPT', to
633: avoid a conflict with the symbol set for invocation of the program.
634:
635:
636: File: gzip.info, Node: Problems, Next: Concept Index, Prev: Environment, Up: Top
637:
638: Reporting Bugs
639: **************
640:
641: If you find a bug in `gzip', please send electronic mail to
642: `[email protected]' or, if this fails, to
643: `[email protected]'. Include the version number, which
644: you can find by running `gzip -V'. Also include in your message the
645: hardware and operating system, the compiler used to compile, a
646: description of the bug behavior, and the input to gzip that triggered
647: the bug.
648:
649:
650: File: gzip.info, Node: Concept Index, Prev: Problems, Up: Top
651:
652: Concept Index
653: *************
654:
655: * Menu:
656:
657: * Environment: Environment.
658: * bugs: Problems.
659: * concatenated files: Advanced usage.
660: * invoking: Invoking gzip.
661: * options: Invoking gzip.
662: * overview: Overview.
663: * sample: Sample.
664:
665:
666:
667: Tag Table:
668: Node: Top864
669: Node: Copying1297
670: Node: Overview20555
671: Node: Sample23686
672: Node: Invoking gzip24889
673: Node: Advanced usage26751
674: Node: Environment27787
675: Node: Problems28340
676: Node: Concept Index28842
677:
678: End Tag Table
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