gzip [OPTIONS] [FILE]

gunzip [OPTIONS] [FILE]

-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 converted 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 compressed 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 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.

    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
    When compressing, use suffix .suf instead of .gz. Any non-empty suffix can be given, but suffixes other than .z and .gz should be avoided to avoid confusion when files are transferred to other systems.

    When decompressing, add .suf to the beginning of the list of suffixes to try, when deriving an output file name from an input file name.

    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 compression method (best compression). The default compression level is -6 (that is, biased towards high compression at expense of speed).

gzip file1

gzip -k file1

gzip -d file.gz

gzip -r folder1

gzip -1 file1
gzip -9 file1

gunzip file1.gz

gunzip -c file1.gz > file1

gunzip -c file1.gz > /home/justin-p/file1

zcat file1.gz

zcat -l file1.gz

zcat -q file.gz