gzip 和 gunzip的区别

gzip 和gunzip的区别是什么呢？

结论是没有区别。

看实际情况：

现用操作系统是ubuntu 20.04

 cat /etc/issue
Ubuntu 20.04.2 LTS \n \l
查看gunzip，

pp@arms:~/work/tdf/randread$ which gunzip
/usr/bin/gunzip
pp@arms:~/work/tdf/randread$ ll /usr/bin/gunzip
-rwxr-xr-x 2 root root 2346 Apr  8  2022 /usr/bin/gunzip*
pp@arms:~/work/tdf/randread$ file /usr/bin/gunzip
/usr/bin/gunzip: POSIX shell script, ASCII text executable
pp@arms:~/work/tdf/randread$ vi /usr/bin/gunzip

/usr/bin/gunzip的内容： 打印了一下help的内容，然后直接调用gzip去了。

#!/bin/sh
# Uncompress files.  This is the inverse of gzip.

# Copyright (C) 2007, 2010-2018 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

version="gunzip (gzip) 1.10
Copyright (C) 2007, 2011-2018 Free Software Foundation, Inc.
This is free software.  You may redistribute copies of it under the terms of
the GNU General Public License .
There is NO WARRANTY, to the extent permitted by law.

Written by Paul Eggert."

usage="Usage: $0 [OPTION]... [FILE]...
Uncompress FILEs (by default, in-place).

Mandatory arguments to long options are mandatory for short options too.

  -c, --stdout      write on standard output, keep original files unchanged
  -f, --force       force overwrite of output file and compress links
  -k, --keep        keep (don't delete) input files
  -l, --list        list compressed file contents
  -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
  -S, --suffix=SUF  use suffix SUF on compressed files
      --synchronous synchronous output (safer if system crashes, but slower)
  -t, --test        test compressed file integrity
  -v, --verbose     verbose mode
      --help        display this help and exit
      --version     display version information and exit

With no FILE, or when FILE is -, read standard input.

Report bugs to ."

case $1 in
--help)    printf '%s\n' "$usage"   || exit 1; exit;;
--version) printf '%s\n' "$version" || exit 1; exit;;
esac

exec gzip -d "$@"