-This is gzip.info-t, produced by makeinfo version 6.0 from gzip.texi.
+This is gzip.info, produced by makeinfo version 6.3 from gzip.texi.
-This manual is for GNU Gzip (version 1.8, 7 March 2016), and documents
+This manual is for GNU Gzip (version 1.9, 7 January 2018), and documents
commands for compressing and decompressing data.
- Copyright © 1998-1999, 2001-2002, 2006-2007, 2009-2016 Free Software
+ Copyright © 1998-1999, 2001-2002, 2006-2007, 2009-2018 Free Software
Foundation, Inc.
Copyright © 1992, 1993 Jean-loup Gailly
END-INFO-DIR-ENTRY
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-File: gzip.info-t, Node: Top, Next: Overview, Up: (dir)
+File: gzip.info, Node: Top, Next: Overview, Up: (dir)
GNU Gzip: General file (de)compression
**************************************
-This manual is for GNU Gzip (version 1.8, 7 March 2016), and documents
+This manual is for GNU Gzip (version 1.9, 7 January 2018), and documents
commands for compressing and decompressing data.
- Copyright © 1998-1999, 2001-2002, 2006-2007, 2009-2016 Free Software
+ Copyright © 1998-1999, 2001-2002, 2006-2007, 2009-2018 Free Software
Foundation, Inc.
Copyright © 1992, 1993 Jean-loup Gailly
* Concept index:: Index of concepts.
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-File: gzip.info-t, Node: Overview, Next: Sample, Prev: Top, Up: Top
+File: gzip.info, Node: Overview, Next: Sample, Prev: Top, Up: Top
1 Overview
**********
‘gzip’ reduces the size of the named files using Lempel–Ziv coding
(LZ77). Whenever possible, each file is replaced by one with the
extension ‘.gz’, while keeping the same ownership modes, access and
-modification times. (The default extension is ‘-gz’ for VMS, ‘z’ for
-MSDOS, OS/2 FAT and Atari.) If no files are specified or if a file name
-is ‘-’, the standard input is compressed to the standard output. ‘gzip’
-will only attempt to compress regular files. In particular, it will
-ignore symbolic links.
+modification times. (The default extension is ‘z’ for MSDOS, OS/2 FAT
+and Atari.) If no files are specified or if a file name is ‘-’, the
+standard input is compressed to the standard output. ‘gzip’ will only
+attempt to compress regular files. In particular, it will ignore
+symbolic links.
If the new file name is too long for its file system, ‘gzip’
truncates it. ‘gzip’ attempts to truncate only the parts of the file
compressed to gzi.msd.exe.gz. Names are not truncated on systems which
do not have a limit on file name length.
- By default, ‘gzip’ keeps the original file name and time stamp in the
+ By default, ‘gzip’ keeps the original file name and timestamp in the
compressed file. These are used when decompressing the file with the
‘-N’ option. This is useful when the compressed file name was truncated
-or when the time stamp was not preserved after a file transfer.
-However, due to limitations in the current ‘gzip’ file format,
-fractional seconds are discarded. Also, time stamps must fall within
-the range 1970-01-01 00:00:00 through 2106-02-07 06:28:15 UTC, and hosts
-whose operating systems use 32-bit time stamps are further restricted to
-time stamps no later than 2038-01-19 03:14:07 UTC. The upper bounds
-assume the typical case where leap seconds are ignored.
+or when the timestamp was not preserved after a file transfer. However,
+due to limitations in the current ‘gzip’ file format, fractional seconds
+are discarded. Also, timestamps must fall within the range 1970-01-01
+00:00:01 through 2106-02-07 06:28:15 UTC, and hosts whose operating
+systems use 32-bit timestamps are further restricted to timestamps no
+later than 2038-01-19 03:14:07 UTC. The upper bounds assume the typical
+case where leap seconds are ignored.
Compressed files can be restored to their original form using ‘gzip
-d’ or ‘gunzip’ or ‘zcat’. If the original name saved in the compressed
bytes for the ‘gzip’ file header, plus 5 bytes every 32K block, or an
expansion ratio of 0.015% for large files. Note that the actual number
of used disk blocks almost never increases. ‘gzip’ normally preserves
-the mode, ownership and time stamps of files when compressing or
+the mode, ownership and timestamps of files when compressing or
decompressing.
The ‘gzip’ file format is specified in P. Deutsch, GZIP file format
specification version 4.3, Internet RFC 1952
-(http://www.ietf.org/rfc/rfc1952.txt) (May 1996). The ‘zip’ deflation
+(https://www.ietf.org/rfc/rfc1952.txt) (May 1996). The ‘zip’ deflation
format is specified in P. Deutsch, DEFLATE Compressed Data Format
Specification version 1.3, Internet RFC 1951
-(http://www.ietf.org/rfc/rfc1951.txt) (May 1996).
+(https://www.ietf.org/rfc/rfc1951.txt) (May 1996).
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-File: gzip.info-t, Node: Sample, Next: Invoking gzip, Prev: Overview, Up: Top
+File: gzip.info, Node: Sample, Next: Invoking gzip, Prev: Overview, Up: Top
2 Sample output
***************
-k, --keep keep (don't delete) input files
-l, --list list compressed file contents
-L, --license display software license
- -n, --no-name do not save or restore the original name and time stamp
- -N, --name save or restore the original name and time stamp
+ -n, --no-name do not save or restore the original name and timestamp
+ -N, --name save or restore the original name and timestamp
-q, --quiet suppress all warnings
-r, --recursive operate recursively on directories
--rsyncable make rsync-friendly archive
sh -e
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+File: gzip.info, Node: Invoking gzip, Next: Advanced usage, Prev: Sample, Up: Top
3 Invoking ‘gzip’
*****************
The format for running the ‘gzip’ program is:
- gzip OPTION …
+ gzip OPTION ...
‘gzip’ supports the following options:
method: compression method (deflate,compress,lzh,pack)
crc: the 32-bit CRC of the uncompressed data
- date & time: time stamp for the uncompressed file
+ date & time: timestamp for the uncompressed file
The CRC is given as ffffffff for a file not in gzip format.
‘--no-name’
‘-n’
- When compressing, do not save the original file name and time stamp
+ When compressing, do not save the original file name and timestamp
by default. (The original name is always saved if the name had to
be truncated.) When decompressing, do not restore the original
file name if present (remove only the ‘gzip’ suffix from the
- compressed file name) and do not restore the original time stamp if
+ compressed file name) and do not restore the original timestamp if
present (copy it from the compressed file). This option is the
default when decompressing.
‘--name’
‘-N’
- When compressing, always save the original file name and time
- stamp; this is the default. When decompressing, restore the
- original file name and time stamp if present. This option is
- useful on systems which have a limit on file name length or when
- the time stamp has been lost after a file transfer.
+ When compressing, always save the original file name and timestamp;
+ this is the default. When decompressing, restore the original file
+ name and timestamp if present. This option is useful on systems
+ which have a limit on file name length or when the timestamp has
+ been lost after a file transfer.
‘--quiet’
‘-q’
of speed).
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+File: gzip.info, Node: Advanced usage, Next: Environment, Prev: Invoking gzip, Up: Top
4 Advanced usage
****************
replacement.
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+File: gzip.info, Node: Environment, Next: Tapes, Prev: Advanced usage, Up: Top
5 Environment
*************
export PATH=/usr/bin
exec gzip -9 "$@"
- On VMS, the name of the obsolescent environment variable is
-‘GZIP_OPT’, to avoid a conflict with the symbol set for invocation of
-the program.
-
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+File: gzip.info, Node: Tapes, Next: Problems, Prev: Environment, Up: Top
6 Using ‘gzip’ on tapes
***********************
You can use the ‘--quiet’ option to suppress the warning.
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+File: gzip.info, Node: Problems, Next: GNU Free Documentation License, Prev: Tapes, Up: Top
7 Reporting Bugs
****************
the bug behavior, and the input to ‘gzip’ that triggered the bug.
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+File: gzip.info, Node: GNU Free Documentation License, Next: Concept index, Prev: Problems, Up: Top
Appendix A GNU Free Documentation License
*****************************************
Version 1.3, 3 November 2008
Copyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
- <http://fsf.org/>
+ <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
the GNU Free Documentation License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns. See
- <http://www.gnu.org/copyleft/>.
+ <https://www.gnu.org/copyleft/>.
Each version of the License is given a distinguishing version
number. If the Document specifies that a particular numbered
Free Documentation License''.
If you have Invariant Sections, Front-Cover Texts and Back-Cover
-Texts, replace the “with…Texts.” line with this:
+Texts, replace the “with...Texts.” line with this:
with the Invariant Sections being LIST THEIR TITLES, with
the Front-Cover Texts being LIST, and with the Back-Cover Texts
their use in free software.
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+File: gzip.info, Node: Concept index, Prev: GNU Free Documentation License, Up: Top
Appendix B Concept index
************************
Tag Table:
Node: Top\7f1472
Node: Overview\7f2701
-Node: Sample\7f8188
-Node: Invoking gzip\7f10336
-Node: Advanced usage\7f16626
-Node: Environment\7f18259
-Node: Tapes\7f19273
-Node: Problems\7f19833
-Node: GNU Free Documentation License\7f20321
-Node: Concept index\7f45675
+Node: Sample\7f8164
+Node: Invoking gzip\7f10308
+Node: Advanced usage\7f16590
+Node: Environment\7f18221
+Node: Tapes\7f19082
+Node: Problems\7f19640
+Node: GNU Free Documentation License\7f20126
+Node: Concept index\7f45480
\1f
End Tag Table
projects / debian / gzip / blobdiff