GZIP(1) General Commands Manual GZIP(1) (NAME) gzip, gunzip, zcat - (SYNOPSIS) gzip [ -acdfhklLnNrtvV19 ] [-S suffix] [ name ... ] gunzip [ -acfhklLnNrtvV ] [-S suffix] [ name ... ] zcat [ -fhLV ] [ name ... ] (DESCRIPTION) gzip - (LZ77) . .gz . ( MSDOS OS/2 FAT Windows NT FAT Atari z .) "-" . gzip (regular) . . gzip . gzip . ( .) . gzip.msdos.exe gzi.msd.exe.gz . . gzip . -N . . gzip -d gunzip zcat . . gunzip .gz -gz .z -z _z ( ) (magic number) . gunzip .tgz .taz .tar.gz .tar.Z . gzip .tgz .tar . gunzip gzip zip compress compress -H pack . . gunzip CRC - . pack gunzip . compress . gunzip .Z . .Z .Z uncompress . uncompress . SCO compress -H ( lzh) CRC . zip gzip 'deflation' . tar.zip tar.gz . zip 'gunzip 'gunzip -S .zip foo.zip' . zip gunzip unzip . zcat gunzip -c . ( zcat gzcat compress .) zcat . zcat .gz . gzip - zip PKZIP . . . LZW ( compress) ( pack) (compact) . . gzip . . gzip . . (OPTIONS) -a --ascii : . . MSDOS CR LF LF LF CR LF . -c --stdout --to-stdout . . . -d --decompress --uncompress (). -f --force . gzip --stdout : zcat cat . -f gzip . -h --help . -k --keep ( ) . -l --list : compressed size: uncompressed size: ratio: ( ) uncompressed_name: gzip ( .Z) - . : zcat file.Z | wc -c --verbose : method: crc: CRC - date & time: deflate compress lzh (SCO compress -H) pack. crc gzip ffffffff . --name . --verbose . --quiet . -L --license gzip . -n --no-name . ( .) ( gzip ) ( ). . -N --name (1970-01-01 00:00:01 UTC) 2**32 (2106-02-07 06:28:16 UTC ) . ( ) . . -q --quiet . -r --recursive . gzip ( gunzip ). -S .suf --suffix .suf .suf .gz. .z .gz . .suf . --synchronous (synchronous). gzip . -t --test . . -v --verbose . . -V --version . . -# --fast --best # -1 --fast ( ) -9 --best ( ) . -6 ( ). --rsyncable rsync . . rsync . rsync . (ADVANCED USAGE) . gunzip . : gzip -c file1 > foo.gz gzip -c file2 >> foo.gz gunzip -c foo : cat file1 file2 .gz ( ). : cat file1 file2 | gzip > foo.gz : gzip -c file1 file2 > foo.gz : gzip -cd old.gz | gzip > new.gz CRC --list . : gzip -cd file.gz | wc -c tar zip . GNU tar -z gzip . gzip tar . (ENVIRONMENT) GZIP gzip . . gzip . gzip . (alias) . gzip /usr/bin $HOME/bin PATH $HOME/bin/gzip : #! /bin/sh export PATH=/usr/bin exec gzip -9 "$@" (SEE ALSO) znew(1), zcmp(1), zmore(1), zforce(1), gzexe(1), zip(1), unzip(1), compress(1) gzip : P. Deutsch, GZIP file format specification version 4.3, , Internet RFC 1952 (May 1996). zip : P. Deutsch, DEFLATE Compressed Data Format Specification version 1.3, , Internet RFC 1951 (May 1996). (DIAGNOSTICS) . . Usage: gzip [-cdfhklLnNrtvV19] [-S suffix] [file ...] . file: not in gzip format gunzip . file: Corrupt input. Use zcat to recover some data. . : zcat file > recover file: compressed with xx bits, can only handle yy bits File ( LZW) . gzip . file: already has .gz suffix -- unchanged . . file already exists; do you wish to overwrite (y or n)? "y" "n". gunzip: corrupt input (SIGSEGV) . xx.x% Percentage of the input saved by compression. . ( -v -l .) -- not a regular file or directory: ignored ( FIFO ) . -- has xx other links: unchanged . ln(1) . -f . (CAVEATS) (tape) (pad) . gunzip gunzip . --quiet . (BUGS) --best (-6) . compress gzip . (REPORTING BUGS) : bug-gzip@gnu.org GNU gzip: : (COPYRIGHT) Copyright (C) 1998-1999, 2001-2002, 2012, 2015-2022 Free Software Foundation, Inc. Copyright (C) 1992, 1993 Jean-loup Gailly . . . local GZIP(1)