- -a --ascii
- Ascii text mode: convert end-of-lines using local con-
- ventions. This option is supported only on some non-
- Unix systems. For MSDOS, CR LF is converted to LF when
- compressing, and LF is converted to CR LF when decom-
- pressing.
-
- -c --stdout --to-stdout
-
-SunOS 5.8 Last change: local 2
-
-User Commands GZIP(1)
-
- Write output on standard output; keep original files
- unchanged. If there are several input files, the out-
- put consists of a sequence of independently compressed
- members. To obtain better compression, concatenate all
- input files before compressing them.
-
- -d --decompress --uncompress
- Decompress.
-
- -f --force
- Force compression or decompression even if the file has
- multiple links or the corresponding file already
- exists, or if the compressed data is read from or writ-
- ten to a terminal. If the input data is not in a format
- recognized by gzip, and if the option --stdout is also
- given, copy the input data without change to the stan-
- dard ouput: let zcat behave as cat. If -f is not
- given, and when not running in the background, gzip
- prompts to verify whether an existing file should be
- overwritten.
-
- -h --help
- Display a help screen and quit.
-
- -l --list
- For each compressed file, list the following fields:
-
- compressed size: size of the compressed file
- uncompressed size: size of the uncompressed file
- ratio: compression ratio (0.0% if unknown)
- uncompressed_name: name of the uncompressed file
-
- The uncompressed size is given as -1 for files not in
- gzip format, such as compressed .Z files. To get the
- uncompressed size for such a file, you can use:
-
- zcat file.Z | wc -c
-
- In combination with the --verbose option, the following
- fields are also displayed:
-
- method: compression method
- crc: the 32-bit CRC of the uncompressed data
- date & time: time stamp for the uncompressed file
-
- The compression methods currently supported are
- deflate, compress, lzh (SCO compress -H) and pack. The
- crc is given as ffffffff for a file not in gzip format.
-
- With --name, the uncompressed name, date and time are
- those stored within the compress file if present.
-
-SunOS 5.8 Last change: local 3
-
-User Commands GZIP(1)
-
- With --verbose, the size totals and compression ratio
- for all files is also displayed, unless some sizes are
- unknown. With --quiet, the title and totals lines are
- not displayed.
-
- -L --license
- Display the gzip license and quit.
-
- -n --no-name
- When compressing, do not save the original file name
- and time stamp by default. (The original name is always
- saved if the name had to be truncated.) When decom-
- pressing, do not restore the original file name if pre-
- sent (remove only the gzip suffix from the compressed
- file name) and do not restore the original time stamp
- if present (copy it from the compressed file). This
- option is the default when decompressing.
-
- -N --name
- When compressing, always save the original file name
- and time stamp; this is the default. When decompress-
- ing, 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.
-
- -q --quiet
- Suppress all warnings.
-
- -r --recursive
- Travel the directory structure recursively. If any of
- the file names specified on the command line are direc-
- tories, gzip will descend into the directory and com-
- press all the files it finds there (or decompress them
- in the case of gunzip ).
-
- -S .suf --suffix .suf
- Use suffix .suf instead of .gz. Any suffix can be
- given, but suffixes other than .z and .gz should be
- avoided to avoid confusion when files are transferred
- to other systems. A null suffix forces gunzip to try
- decompression on all given files regardless of suffix,
- as in:
-
- gunzip -S "" * (*.* for MSDOS)
-
- Previous versions of gzip used the .z suffix. This was
- changed to avoid a conflict with pack(1).
-
- -t --test
- Test. Check the compressed file integrity.
-
-SunOS 5.8 Last change: local 4
-
-User Commands GZIP(1)
-
- -v --verbose
- Verbose. Display the name and percentage reduction for
- each file compressed or decompressed.
-
- -V --version
- Version. Display the version number and compilation
- options then quit.
-
- -# --fast --best
- Regulate the speed of compression using the specified
- digit #, where -1 or --fast indicates the fastest com-
- pression method (less compression) and -9 or --best
- indicates the slowest compression method (best compres-
- sion). The default compression level is -6 (that is,
- biased towards high compression at expense of speed).
+ -a --ascii
+ Ascii text mode: convert end-of-lines using local conventions.
+ This option is supported only on some non-Unix systems. For
+ MSDOS, CR LF is converted to LF when compressing, and LF is con-
+ verted to CR LF when decompressing.
+
+ -c --stdout --to-stdout
+ Write output on standard output; keep original files unchanged.
+ If there are several input files, the output consists of a
+ sequence of independently compressed members. To obtain better
+ compression, concatenate all input files before compressing
+ them.
+
+ -d --decompress --uncompress
+ Decompress.
+
+ -f --force
+ Force compression or decompression even if the file has multiple
+ links or the corresponding file already exists, or if the com-
+ pressed data is read from or written to a terminal. If the input
+ data is not in a format recognized by gzip, and if the option
+ --stdout is also given, copy the input data without change to
+ the standard output: let zcat behave as cat. If -f is not
+ given, and when not running in the background, gzip prompts to
+ verify whether an existing file should be overwritten.
+
+ -h --help
+ Display a help screen and quit.
+
+ -l --list
+ For each compressed file, list the following fields:
+
+ compressed size: size of the compressed file
+ uncompressed size: size of the uncompressed file
+ ratio: compression ratio (0.0% if unknown)
+ uncompressed_name: name of the uncompressed file
+
+ The uncompressed size is given as -1 for files not in gzip for-
+ mat, such as compressed .Z files. To get the uncompressed size
+ for such a file, you can use:
+
+ zcat file.Z | wc -c
+
+ In combination with the --verbose option, the following fields
+ are also displayed:
+
+ method: compression method
+ crc: the 32-bit CRC of the uncompressed data
+ date & time: time stamp for the uncompressed file
+
+ The compression methods currently supported are deflate, com-
+ press, lzh (SCO compress -H) and pack. The crc is given as
+ ffffffff for a file not in gzip format.
+
+ With --name, the uncompressed name, date and time are those
+ stored within the compress file if present.
+
+ With --verbose, the size totals and compression ratio for all
+ files is also displayed, unless some sizes are unknown. With
+ --quiet, the title and totals lines are not displayed.
+
+ -L --license
+ Display the gzip license and quit.
+
+ -n --no-name
+ When compressing, do not save the original file name and time
+ stamp 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 present (copy it from the compressed file). This option
+ is the default when decompressing.
+
+ -N --name
+ 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.
+
+ -q --quiet
+ Suppress all warnings.
+
+ -r --recursive
+ Travel the directory structure recursively. If any of the file
+ names specified on the command line are directories, gzip will
+ descend into the directory and compress all the files it finds
+ there (or decompress them in the case of gunzip ).
+
+ -S .suf --suffix .suf
+ Use suffix .suf instead of .gz. Any suffix can be given, but
+ suffixes other than .z and .gz should be avoided to avoid confu-
+ sion when files are transferred to other systems. A null suffix
+ forces gunzip to try decompression on all given files regard-
+ less of suffix, as in:
+
+ gunzip -S "" * (*.* for MSDOS)
+
+ Previous versions of gzip used the .z suffix. This was changed
+ to avoid a conflict with pack(1).
+
+ -t --test
+ Test. Check the compressed file integrity.
+
+ -v --verbose
+ Verbose. Display the name and percentage reduction for each file
+ compressed or decompressed.
+
+ -V --version
+ Version. Display the version number and compilation options then
+ quit.
+
+ -# --fast --best
+ Regulate the speed of compression using the specified digit #,
+ where -1 or --fast indicates the fastest compression method
+ (less compression) and -9 or --best indicates the slowest com-
+ pression method (best compression). The default compression
+ level is -6 (that is, biased towards high compression at expense
+ of speed).