zcat

GZIP(1)                     General Commands Manual                    GZIP(1)



å称
       gzip, gunzip, zcat - ãã¡ã¤ã«ã®å§ç¸®ã伸é·ãè¡ãªã

æ¸å¼
       gzip [ -acdfhlLnNrtvV19 ] [-S suffix] [ name ...  ]
       gunzip [ -acfhlLnNrtvV ] [-S suffix] [ name ...  ]
       zcat [ -fhLV ] [ name ...  ]

解説
       gzip ã¯ãLempel-Ziv ã¢ã«ã´ãªãºã  (LZ77) ãå©ç¨ãã¦ãã¡ã¤ã«ã®ãµã¤ãºãæ¸ããã¾ãã
       ããå¯è½ãªå ´åã¯ããã¡ã¤ã«åã« .gz ã®æ¡å¼µåãã¤ãã
       ãã¡ã¤ã«ã®ææèãã¢ã¯ã»ã¹æéã¨æ´æ°æéãä¿åãã¾ãã (ããã©ã«ãã®æ¡å¼µåã¯ã VMS ã§ã¯
       -gz ãMSDOS, OS/2 FAT, Windows NT FAT, Atari ã§ã¯ z ã¨ãªãã¾ãã)
       ããããã¡ã¤ã«åãæå®ãããªãã£ããããã¡ã¤ã«åã¨ã㦠"-" ãæå®ãããã°ã
       æ¨æºå¥åãå§ç¸®ããçµæãæ¨æºåºåã¸åºåãã¾ãã gzip ã¯ãä¸è¬ãã¡ã¤ã«ã®ã¿ãå§ç¸®ãã¾ãã
       ç¹ã«ãã·ã³ããªãã¯ãªã³ã¯ã¯ç¡è¦ããã¾ãã

       ãããå§ç¸®ããããã¡ã¤ã«åããã¡ã¤ã«ã·ã¹ãã ã«ã¨ã£ã¦é·ããã°ã gzip
       ã¯ããã®ååã縮ãã¾ãã gzip ã¯ããã¡ã¤ã«åã® 3 æå‐
       以ä¸ã®é¨åã«ã®ã¿ååã®ç¸®å°ã試ã¿ã¾ãã (é¨åã¨ã¯ããããã«ãã£ã¦åããããæã§ãã)
       ããããã¡ã¤ã«åãçããé¨åã®ã¿ã§
       æ§æããã¦ããæã¯ãæãé·ãé¨åã縮å°ãã¾ããä¾ãã°ããã¡ã¤ã«åã 14 æå ã¨ããå¶éãããæã
       gzip.msdos.exe 㯠gzi.msd.exe.gz ã¨ãªãã¾ãã ãã¡ã¤ã«åã®æå‐
       æ°ãå¶éãæããªãã·ã¹ãã ã§ã¯ã ãã¡ã¤ã«åã®ç¸®å°ã¯è¡ããã¾ããã

       ããã©ã«ã㧠gzip ã¯ããªãªã¸ãã«ã®ãã¡ã¤ã«åã¨ã¿ã¤ã ã¹ã¿ã³ããå§ç¸®ããããã¡ã¤ã«ä¸‐
       ã«ä¿åãã¾ãã ãããã¯ã -N
       ãªãã·ã§ã³ä»ãã§ä¼¸é·ãããæã«ã使ããã¾ããããã¯ãå§ç¸®ããããã¡ã¤ã«åã
       縮å°ããã¦ãããããã¡ã¤ã«è»¢éå¾ã«ã¿ã¤ã ã¹ã¿ã³ããä¿åãããªãã£ãæ㫠便å©ã§ãã

       å§ç¸®ããããã¡ã¤ã«ã¯ã gzip -d ã gunzip ã zcat
       ãç¨ãããªãªã¸ãã«ã«æ»ããã¨ãåºæ¥ã¾ãã ãããå§ç¸®ããããã¡ã¤ã«ã«ä¿å‐
       ããããªãªã¸ãã«ã®ãã¡ã¤ã«åããã¡ã¤ã«ã·ã¹ãã ã«
       åããªããã°ããªãªã¸ãã«ã®ãã¡ã¤ã«åããæ°ãããã¡ã¤ã«åãä½ããã¾ãã

       gunzip ã¯ãã³ãã³ãã©ã¤ã³ä¸ã®ãã¡ã¤ã«ã®ãªã¹ãã åãåãã.gz, -gz, .z, -z, _z, .Z
       ã§çµã£ã¦ãã¦ãæ£ãããã¸ãã¯ãã³ã㧠å§ã¾ã£ã¦ãããã¡ã¤ã«ãã åã®æ¡å¼µå‐
       ãåãé¤ããå§ç¸®ããã¦ããªããã¡ã¤ã«ã«ãã¾ãã gunzip ã¯ã .tar.gz ã .tar.Z ãçç¥ãã
       .tgz ã .taz ãèªèãã¾ãã å§ç¸®ããæã gzip ã¯ã .tar
       ãã¡ã¤ã«ã®ãã¡ã¤ã«åã縮ãããããã« .tgz ã使ãã¾ãã

       gunzip ã¯ã gzip, zip, compress, compress -H, pack
       ã§ä½ããããã¡ã¤ã«ã伸é·ã§ãã¾ãã
       å¥åããããã¡ã¤ã«ãã©ã®æ¹å¼ã§å§ç¸®ããã¦ãããã¯èªåçã«å¤å¥ããã¾ãã
       æåã®äºã¤ã®æ¹å¼ã使ãã¨ã gunzip 㯠32ããã CRC ããã§ãã¯ãã¾ãã pack ã®å ´åã
       gunzip ã¯ä¼¸é·ããã大ããããã§ãã¯ãã¾ããæ¨æºã® compress
       ã¯ä¸è²«æ§ã®ãã§ãã¯ãããããã«è¨è¨ããã¦ãã¾ããã§ãããã gunzip 㯠.Z ãã¡ã¤ã«ãæ‐
       £ãããªããã¨ãæ¤åºã§ãããã¨ãããã¾ãã ãã .Z
       ãã¡ã¤ã«ã伸é·ããæã«ã¨ã©ã¼ã«ä¼ãå ´åã«ã¯ã æ¨æºã® uncompress
       ãã¨ã©ã¼ãåºããªãã¨ããçç±ã§ .Z ãã¡ã¤ã«ã¯æ£ãã ã¨æããªãã§ä¸ããã
       ããã¯ä¸è¬çã«ãæ¨æºã® uncompress
       ãå¥åããã§ãã¯ãããã´ãã§ããåºåããã¦ãã¾ãã¨ããäºãæå³ãã¦ãã¾ãã SCO compress -H æ¹å¼
       (lzh å§ç¸®ææ³) 㯠CRC ãå«ã¿ã¾ãããã ããç¨åº¦ã®ä¸è²«æ§ã®ãã§ãã¯ã®ä½å°ãããã¾ãã

       zip ã§ä½ããããã¡ã¤ã«ã¯ã 'deflation' ææ³ã§å§ç¸®ãããä¸ã¤ã®ã¡ã³ãã ãã¤æã®ã¿
       gzip ã§ä¼¸é·ã§ãã¾ãããã®ç¹å¾´ã¯ tar.zip ãã¡ã¤ã«ã tar.gz ãã¡ã¤ã«ã«
       ããã®ãå©ãããã¨ã®ã¿ãæå³ãã¦ãã¾ããè¤æ°ã®ã¡ã³ããæã£ã zip ãã¡ã¤ã«ã åãåºãæã«ã¯
       gunzip ã§ã¯ãªã unzip ã使ã£ã¦ä¸ããã

       zcat ã¯ã gunzip -c ã¨åä¸ã§ãã (ããã¤ãã®ã·ã¹ãã ã§ã¯ã zcat 㯠compress
       ã¸ã®ãªãªã¸ãã«ã®ãªã³ã¯ãä¿åãã¦ããããã« gzcat
       ã¨ãã¦ã¤ã³ã¹ãã¼ã«ããã¦ããããããã¾ããã) zcat
       ã¯ãã³ãã³ãã©ã¤ã³ã§æå®ããããã¡ã¤ã«ãæ¨æºå¥åããã®å¥åã伸é·ãã
       æ¨æºåºåã¸ä¼¸é·ãããã¼ã¿ãåºåãã¾ãã zcat ã¯ã .gz æ¡å¼µå‐
       ã§ãããã¨ãªãããã¨ããã¸ãã¯ãã³ããæ£ãããã°ãã¡ã¤ã«ãä¼¸é· ãã¾ãã

       gzip ã¯ã zip ã PKZIP ã§ä½¿ããã¦ãã Lempel-Ziv ã¢ã«ã´ãªãºã ã使ã£ã¦ãã¾ãã
       å§ç¸®çã¯å¥åã®å¤§ãããå±éã®æååã®åå¸ã«ããã¾ãã
       ä¸è¬ã«ãã½ã¼ã¹ã³ã¼ããè±èªã®ãããªããã¹ã㯠60-70% 縮å°ããã¾ãã ã¾ãã LZW (
       compress ã§ä½¿ããã¦ãã)ã Huffman coding ( pack ã§ä½¿ããã¦ãã)ã é©å¿æ§
       Huffman coding (compact) ãããå§ç¸®çãè¯ãã§ãã

       å§ç¸®ããããã¡ã¤ã«ããªãªã¸ãã«ã®ãã¡ã¤ã«ãããããã§ã大ããã¨ãã¦ãã
       å§ç¸®ã¯å¸¸ã«è¡ããã¾ããææªã®ä¼¸é·ã¯ gzip ãã¡ã¤ã«ãããã®æ°ãã¤ãã 32K ãããã¯æ¯ã«
       5 ãã¤ãã®å¢å ãããªãã¡ä¼¸é·ç 0.015% ã§ãã 使ç¨ãã¦ãããã£ã¹ã¯ãã‐
       ãã¯ã®å®éã®æ°ã¯ã»ã¨ãã©ã®å ´å決ãã¦å¢å ããªãäºã« 注æãã¦ãã ããã gzip
       ã¯ãå§ç¸®ã伸é·ãè¡ãæãã¡ã¤ã«ã®ã¢ã¼ããææèãã¿ã¤ã ã¹ã¿ã³ããä¿åãã¾ãã


ãªãã·ã§ã³
       -a --ascii
              è¡æ«ã®å¤æãè¡ãã¾ãããã®ãªãã·ã§ã³ã¯é Unix ç°å¢ã§ã®ã¿
              ãµãã¼ãããã¦ãã¾ããä¾ãã°MSDOSã§ã¯ãå§ç¸®æã« CR LF ã LF ã«å¤æããã
              伸é·æã« LF ã CR LF ã«å¤æããã¾ãã

       -c --stdout --to-stdout
              ãªãªã¸ãã«ãã¡ã¤ã«ã¯ãã®ã¾ã¾ã§ãçµæãæ¨æºåºåã¸æ¸ãåºãã¾ãã
              ãããè¤æ°ã®ãã¡ã¤ã«ãå¥åãããã°ãçµæã¯ä¸ç¶ãã®ç¬ç«ãããã®ã«
              ãªãã¾ããããããå§ç¸®ãããããã«ã¯ãå§ç¸®ãããåã«ãã¹ã¦ã®å¥å
              ãã¡ã¤ã«ãçµåããã¨ããã§ãã

       -d --decompress --uncompress
              伸é·ãè¡ãã¾ãã

       -f --force
              ãã¡ã¤ã«ãè¤æ°ã®ãªã³ã¯ãæã£ã¦ãããããã§ã«ãã¡ã¤ã«ãåå¨ãã¦ããã¨ãã¦ãã
              ã¾ãå§ç¸®ããããã¼ã¿ã端æ«ããèªã¿æ¸ããããã¨ããã¨ãã§ãå§ç¸®ã伸é·ã
              å¼·è¡ãã¾ããããå¥åããããã¼ã¿ã gzip ã§èªèåºæ¥ãªãå½¢å¼ã§ãããªãã·ã§ã³
              --stdout ãæå®ãããå ´åã
              å¤æ´ããããã¨ãªãå¥åããããã¼ã¿ã¯æ¨æºåºåã¸ã³ãã¼ããã¾ã: zcat 㯠cat
              ã¨ãã¦æ¯èãã¾ãããã -f ãæå®ããã¦ããã
              ããã¯ã°ã©ã¦ã³ãã§å®è¡ããã¦ããªãå ´åã«ã¯ã gzip
              ã¯ãã¡ã¤ã«ãä¸æ¸ããã¦ããã確èªãæ±ãã¾ãã

       -h --help
              ãã«ãã表示ããçµäºãã¾ãã

       -l --list
              å§ç¸®ããããã¡ã¤ã«ããããã«ä»¥ä¸ã®ãã£ã¼ã«ãã表示ããã

                  compressed size: å§ç¸®ããããã¡ã¤ã«ã®å¤§ãã
                  uncompressed size: 伸é·ããããã¡ã¤ã«ã®å¤§ãã
                  ratio: å§ç¸®ç (åãããªããã° 0.0%)
                  uncompressed_name: 伸é·ããããã¡ã¤ã«ã®åå

              uncompressed size ã -1 ãªãã°ããã¡ã¤ã«ã¯ gzip å½¢å¼ã§ã¯ãªã .Z
              ãã¡ã¤ã«çã§ãã ãã®ãããªãã¡ã¤ã«ã®ä¼¸é·ããããã¡ã¤ã«ã®å¤§ããã
              ç¥ãã«ã¯ã以ä¸ã®ããã«ãã¦ä¸ããã

                  zcat file.Z | wc -c

              --verbose ãªãã·ã§ã³ãå±ã«æå®ããã¨ã以ä¸ã®ãã£ã¼ã«ãã追å ããã¾ãã

                  method: å§ç¸®ææ³
                  crc: 伸é·ããããã¡ã¤ã«ã® 32-bit CRC
                  date & time: 伸é·ããããã¡ã¤ã«ã®ã¿ã¤ã ã¹ã¿ã³ã

              å§ç¸®ææ³ã¯ä»ã®ã¨ãã deflate, compress, lzh (SCO compress -H),
              pack ã ãµãã¼ããã¦ãã¾ããcrc ã ffffffff ãªãã°ãgzip å½¢å¼ã§ã¯ããã¾ããã

              --name ãªãã·ã§ã³ãå±ã«æå®ããã¨ã表示ãã伸é·ããããã¡ã¤ã«ã®ååãæ¥ä»ãæé
              ã¯å§ç¸®ããããã¡ã¤ã«ã«ä¿åããããã®ã«ãªãã¾ãã

              --verbose ãªãã·ã§ã³ãå±ã«æå®ããã¨ã
              å¨ã¦ã®ãã¡ã¤ã«ã®ãµã¤ãºã®ãã¼ã¿ã«ãå§ç¸®çã 表示ããã¾ã
              (ãã¡ã¤ã«ãµã¤ãºãåãããªããã®ãããå ´åãé¤ãã¾ã)ã --quiet
              ãªãã·ã§ã³ãå±ã«æå®ããã¨ãã¿ã¤ãã«ããã¼ã¿ã«ã©ã¤ã³ã¯è¡¨ç¤ºããã¾ããã

       -L --license
              gzip ã©ã¤ã»ã³ã¹ã表示ããçµäºãã¾ãã

       -n --no-name
              å§ç¸®ããæãããã©ã«ãã§ãªãªã¸ãã«ã®ãã¡ã¤ã«åãã¿ã¤ã ã¹ã¿ã³ããä¿åãã¾ããã
              (ãããã¡ã¤ã«åã縮ãããããªãã°ããªãªã¸ãã«ã®ãã¡ã¤ã«åã¯å¸¸ã« ä¿åããã¾ãã)
              伸é·ããæããããªãªã¸ãã«ã®ãã¡ã¤ã«åãåå¨ãã¦ã 復åãã¾ãã
              (å§ç¸®ããããã¡ã¤ã«ã®ååãã gzip
              ãµãã£ãã¯ã¹ã®ã¿ãåãé¤ãã¾ã)ããããªãªã¸ãã«ã®ã¿ã¤ã ã¹ã¿ã³ãã å‐
              å¨ãã¦ã復åãã¾ãã (å§ç¸®ããããã¡ã¤ã«ããã³ãã¼ãã¾ã)ããã®
              ãªãã·ã§ã³ã¯ä¼¸é·ããæã®ããã©ã«ãã§ãã

       -N --name
              å§ç¸®ããæã常ã«ãªãªã¸ãã«ã®ãã¡ã¤ã«åã¨ã¿ã¤ã ã¹ã¿ã³ããä¿åãã¾ãã
              ããã¯ããã©ã«ãã§ãã伸é·ããæããããªãªã¸ãã«ã®ãã¡ã¤ã«åãã¿ã¤ã  ã¹ã¿ã³ããå‐
              å¨ããã°å¾©åãã¾ããããã¯ãã¡ã¤ã«åã®é·ãã«å¶éã®ãã
              ã·ã¹ãã ãã¿ã¤ã ã¹ã¿ã³ãããã¡ã¤ã«è»¢éå¾ã«å¤±ãããæã«å½¹ã«ç«ã¡ã¾ãã

       -q --quiet
              ãã¹ã¦ã®è¦åãæå¶ãã¾ãã

       -r --recursive
              ãã£ã¬ã¯ããªæ§é ãå帰çã«é²ã¿ã¾ãããããã³ãã³ãã©ã¤ã³ã§æå®ããã
              ãã¡ã¤ã«åã®ãã£ã¬ã¯ããªãããã°ã gzip ã¯ãã®ãã£ã¬ã¯ããªã¸é²ã¿ã
              ãã®ãã£ã¬ã¯ããªã§çºè¦ããå¨ã¦ã®ãã¡ã¤ã«ãå§ç¸®ãã¾ã ( gunzip
              ã®å ´åã¯ãããã伸é·ãã¾ã)ã

       -S .suf --suffix .suf
              .gz ã®ä»£ããã« .suf ã¨ãããµãã£ãã¯ã¹ã使ãã¾ããã©ã®ãããªãµãã£ãã¯ã¹
              ã§ã使ãäºãåºæ¥ã¾ããããã¡ã¤ã«ãä»ã®ã·ã¹ãã ã«è»¢éããæã®æ··ä¹±ãé¿ãã
              ããã«ã.z ã .gz 以å¤ã®ãµãã£ãã¯ã¹ã¯é¿ããã¹ãã§ãããµãã£ãã¯ã¹ã«
              ãã«ãæå®ããã¨ã 以ä¸ã®ããã« gunzip
              ã¯ãµãã£ãã¯ã¹ã«ããããããã¹ã¦ã®ãã¡ã¤ã«ã 伸é·ãããã¨ãã¾ãã

                  gunzip -S "" *       (MSDOS ã§ã¯ *.*)

              gzip ã®ä»¥åã®ãã¼ã¸ã§ã³ã§ã¯ .z ãµãã£ãã¯ã¹ã使ã£ã¦ãã¾ããã ããã¯ã
              pack(1) ã¨ã®è¡çªãé¿ããããã«å¤æ´ããã¾ããã

       -t --test
              ãã¹ããå§ç¸®ããããã¡ã¤ã«ãå®å¨ãªãã®ããã§ãã¯ãã¾ãã

       -v --verbose
              åé·ã¡ãã»ã¼ã¸ã表示ãã¾ããå§ç¸®/伸é·ãããåãã¡ã¤ã«åã¨å§ç¸®çã
              表示ãã¾ãã

       -V --version
              ãã¼ã¸ã§ã³ãã³ãããªãã·ã§ã³ã表示ããå¾ãçµäºãã¾ãã

       -# --fast --best
              å§ç¸®ã®é度ãæ°å¤ # ã§èª¿ç¯ãã¾ããä¾ãã°ã -1 ã --fast
              ã¯å§ç¸®é度ãæãéãã (å§ç¸®çã¯æä½)ã -9 ã --best
              ã¯å§ç¸®é度ãæãéããã¾ã (å§ç¸®çã¯æé«)ã ããã©ã«ãã®å§ç¸®ã¬ãã«ã¯ -6
              (ã¤ã¾ã é度ããé«ãå§ç¸®çãéè¦ãã¦ãã)ã

é²ãã 使ç¨æ³
       è¤æ°ã®å§ç¸®ããããã¡ã¤ã«ã¯çµåããäºãã§ãã¾ãããã®å ´åã gunzip
       ã¯åæã«ãã¹ã¦ã®ã¡ã³ããåãåºãã¾ããä¾ãã°ã

             gzip -c file1  > foo.gz
             gzip -c file2 >> foo.gz ãã®å¾ã
             gunzip -c foo

       ã¯

             cat file1 file2

       ã¨åãäºã§ãã.gz ãã¡ã¤ã«ã®ä¸ã¤ã®ã¡ã³ããå£ããå ´åãä»ã®ã¡ã³ã㯠復åã§ãã¾ã
       (å£ããã¡ã³ããåãé¤ãã°)ããããã åæã«ãã¹ã¦ã®ã¡ã³ããå§ç¸®ããæã

             gzip -c file1 file2 > foo.gz

       ã¨å®è¡ããããã以ä¸ã®ããã«å®è¡ããã¨ããå§ç¸®çãä¸ããäºãåºæ¥ã¾ãã

             cat file1 file2 | gzip > foo.gz

       ããçµåããããã¡ã¤ã«ãããå§ç¸®çãä¸ããããã«åå§ç¸®ããããã°ã 以ä¸ã®ããã«å®è¡ãã¦ä¸ããã

             gzip -cd old.gz | gzip > new.gz

       ããå§ç¸®ããããã¡ã¤ã«ãããã¤ãã®ã¡ã³ããæã¤ã®ãªãã --list
       ãªãã·ã§ã³ã§å ±åããã伸é·å¾ã®å¤§ããã CRC ã¯æå¾ã®ã¡ã³ãã®ã¿ã
       示ãã¦ãã¾ãããã¹ã¦ã®ã¡ã³ãã®ä¼¸é·å¾ã®å¤§ãããå¿è¦ãªãã以ä¸ã®ããã«
       å®è¡ãã¦ä¸ããã

             gzip -cd file.gz | wc -c

       è¤æ°ã®ã¡ã³ããæã¡ãå¾ããããã¡ã³ããæãåãäºãã§ãããããª
       åä¸ã®ã¢ã¼ã«ã¤ããã¡ã¤ã«ãä½ããããã°ã tar ã zip ã®ãããªã¢ã¼ã«ã¤ãã使ã£ã¦ä¸ããã
       GNU tar 㯠gzip ãå¼ã³åºã -z ãªãã·ã§ã³ããµãã¼ããã¦ãã¾ãã gzip 㯠tar
       ã®ä»£æ¿ã§ã¯ãªã tar ã®è£è¶³ã¨ãã¦è¨è¨ããã¦ãã¾ãã

ç°å¢å¤æ°
       ç°å¢å¤æ° GZIP ã«ã¯ã gzip
       èµ·åæã«ã³ãã³ãã©ã¤ã³ã«ä»å ãããªãã·ã§ã³ãæå®ã§ãã¾ãã
       ãããã®ãªãã·ã§ã³ãã¾ã解éãããã³ãã³ãã©ã¤ã³ã®ãã©ã¡ã¼ã¿
       ã«ãã£ã¦ä¸æ¸ãããã¾ããä¾ãã°ã
             sh ã§ã¯:    GZIP="-8v --name"; export GZIP
             csh ã§ã¯:   setenv GZIP "-8v --name"
             MSDOS ã§ã¯: set GZIP=-8v --name

       Vax/VMS ã§ã¯ãç°å¢å¤æ°ã®åå㯠GZIP_OPT ã§ããããã¯ããã°ã©ã ã®
       å§åã®ããã®ã·ã³ãã«ã»ããã¨ã®è¡çªãé¿ããããã§ãã

é¢é£é ç®
       znew(1), zcmp(1), zmore(1), zforce(1), gzexe(1), compress(1)

診æ
       çµäºã³ã¼ãã¯é常 0 ã§ã; ã¨ã©ã¼ãèµ·ãã£ãå ´å㯠1 ãè¿ãã¾ãã è¦åãåºãæ㯠2
       ãè¿ãã¾ãã

       Usage: gzip [-cdfhlLnNrtvV19] [-S suffix] [file ...]
               ç¡å¹ãªãªãã·ã§ã³ãã³ãã³ãã©ã¤ã³ã«æå®ããã¦ãã¾ãã
       file: not in gzip format
               gunzip ã«æå®ããããã¡ã¤ã«ã¯å§ç¸®ããã¦ãã¾ããã
       file: Corrupt input. Use zcat to recover some data.
               å§ç¸®ããããã¡ã¤ã«ãå£ãã¦ãã¾ããå£ãã¦ããé¨åã¾ã§ã®ãã¼ã¿ã
               以ä¸ã®ããã«ãã¦å¾©åã§ãã¾ãã
                       zcat file > recover
       file: compressed with xx bits, can only handle yy bits
               file ãããã®ãã·ã³ã®ä¼¸é·ããã°ã©ã ãããå¤ãã® bit ãå¦çã§ããããã°ã©ã ã«ãã
               (LZW ã使ã) å§ç¸®ããã¦ãã¾ãã ãã¡ã¤ã«ã gzip ã§åå§ç¸®ãã¦ãã ããã
               å§ç¸®çãè¯ããªãã¡ã¢ãªä½¿ç¨éãå°ãªããªãã¾ãã
       file: already has .gz suffix -- no change
               ãã¡ã¤ã«ãæ¢ã«å§ç¸®ããã¦ããããããã¾ããããã¡ã¤ã«ããªãã¼ã ãã¦
               ããä¸åº¦è©¦ãã¦ãã ããã
       file already exists; do you wish to overwrite (y or n)?
               ããåºåãã¡ã¤ã«ãç½®ãæããããã°ã"y" ã¨çãã¦ãã ãããããã§ãªããã° "n" ã¨ç‐
               ãã¦ãã ããã
       gunzip: corrupt input
               SIGSEGV éåãæ¤åºããã¾ãããããã¯é常ãå¥åããããã¡ã¤ã«ãå£ãã¦ããäºã
               æå³ãã¦ãã¾ãã
       xx.x%
               å§ç¸®ã§ä¿åãããå¥åã®å²å ( -v 㨠-l ã«ã®ã¿é¢ä¿ããã¾ã)ã
       -- not a regular file or directory: ignored
               å¥åãã¡ã¤ã«ãé常ãã¡ã¤ã«ããã£ã¬ã¯ããªã§ãªãæ
               (ã·ã³ããªãã¯ãªã³ã¯ãã½ã±ãããFIFOãããã¤ã¹ãã¡ã¤ã«)ãããã㯠å¤æ´ããã¾ããã
       -- has xx other links: unchanged
               å¥åãã¡ã¤ã«ããªã³ã¯ããã£ã¦ãã¾ã; å¤æ´ãããªãã¾ã¾ã§ãããã詳ããäºã¯ ln(1)
               ãåç§ãã¦ä¸ãããè¤æ°ã®ãªã³ã¯ãæã¤ãã¡ã¤ã«ãå§ç¸®ããããã«ã¯ -f
               ãã©ã°ã使ç¨ãã¦ä¸ããã

注æ
       å§ç¸®ããããã¼ã¿ããã¼ãã«æ¸ãæãä¸è¬ã«ãããã¯å¢çã¾ã§ 0 ã§åããå¿è¦ã
       ããã¾ãããã¼ã¿ãèªã¿ãå¨ãããã¯ã gunzip ã§ä¼¸é·ããæã gunzip
       ã¯å§ç¸®ããããã¼ã¿ã®å¾ã«ã´ããããã¨æ¤åºããããã©ã«ãã§ã¯è¦åãåºåãã¾ãã ãã®è‐
       ¦åãæããã«ã¯ --quiet ãªãã·ã§ã³ã使ããªããã°ãªãã¾ããã
       ãã®ãªãã·ã§ã³ã¯ã以ä¸ã®ããã« GZIP ç°å¢å¤æ°ã«ã»ããåºæ¥ã¾ãã
         sh ã§ã¯:  GZIP="-q"  tar -xfz --block-compress /dev/rst0
         csh ã§ã¯: (setenv GZIP -q; tar -xfz --block-compr /dev/rst0

       ä¸è¨ã®ä¾ã§ã¯ãgzip 㯠GNU tar ã® -z ãªãã·ã§ã³ã«ãã£ã¦
       æé»çã«å¼ã³åºããã¦ãã¾ãã ãã¼ãã§å§ç¸®ããããã¼ã¿ãèªã¿æ¸ãããã®ã«åããããã¯ãµã¤ãº
       (tar ã® -b ãªãã·ã§ã³) ã使ãã㦠ããã確èªãã¦ä¸ããã(ãã®ä¾ã§ã¯ tar 㯠GNU
       Version ã使ã£ã¦ãã㨠仮å®ãã¦ãã¾ãã)

ãã°
       ãµã¤ãºã 2GB ãè¶ããå ´åã®ãªãã·ã§ã³ --list ã«ããåºåã¯ãæ£ãããªããã®ã§ãã
       å§ç¸®ãã¡ã¤ã«ãã·ã¼ã¯ã§ããªãåªä½ä¸ã«åå¨ããå ´åã ãªãã·ã§ã³ --list ã«ããåºåã¯ã
       ãµã¤ãºã -1 ã¨ããããåã® CRC ã 0xffffffffã¨ãã¾ãã

       ã¾ãã«ããªãã·ã§ã³ --best ãä»å ãã¦å§ç¸®ããå ´åããããããã©ã«ãã®å§ç¸® æ (-6)
       ã®æ¹ãå§ç¸®çãè¯ããã¨ãããã¾ãããã¡ã¤ã«ã«é«ãåé·æ§ãããã°ã compress ã®æ¹ã gzip
       ããå§ç¸®çãããã§ãã



                                                                       GZIP(1)