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命令“清除”和“重置”有什么区别？

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命令“清除”和“重置”有什么区别？

命令“clear”和“reset”有什么区别？

（整个问题都在标题中，但网站拒绝让我发表没有正文的帖子，因此重复）

答案1

man clear和man reset详细解释每个命令的作用。

clear 仅有的清除屏幕（如果可能的话，包括回滚缓冲区），并且它仅将执行此操作的终端序列输出到标准输出。其他设置不会被触及，例如，如果设置了背景颜色，clear将以该颜色填充终端：

tput setab 2; clear; echo test

reset完全重置终端：它将各种模式恢复到预期值，重置窗口大小，重置延迟和选项卡扩展，输出终端的“重置”或“初始化”序列，并刷新输出。它尝试各种输入和输出来确定如何与您的终端对话，而不是盲目地使用标准输出；这确保它会对您的终端产生影响。它还等待给终端时间来重置。因此

tput setab 2; reset; echo test

将始终导致具有默认设置的清除终端（在大多数默认设置中为黑底白字）。

如果您尝试两者，您会发现这clear是瞬时的，而reset需要一秒钟多一点（因为它明确地休眠了一秒钟，希望这足以用于重置正在使用的任何终端）。

答案2

NAME
       clear - clear the terminal screen

SYNOPSIS
       clear [-Ttype] [-V] [-x]

DESCRIPTION
       clear  clears your screen if this is possible, including its scrollback
       buffer (if the extended “E3” capability is defined).   clear  looks  in
       the environment for the terminal type given by the environment variable
       TERM, and then in the terminfo database to determine how to  clear  the
       screen.

       clear  writes  to  the  standard output.  You can redirect the standard
       output to a file (which  prevents  clear  from  actually  clearing  the
       screen),  and  later  cat  the  file to the screen, clearing it at that
       point.

NAME
       tset, reset - terminal initialization

SYNOPSIS
       tset [-IQVcqrsw] [-] [-e ch] [-i ch] [-k ch] [-m mapping] [terminal]
       reset [-IQVcqrsw] [-] [-e ch] [-i ch] [-k ch] [-m mapping] [terminal]

   reset - reinitialization
       When invoked as reset, tset sets the terminal modes to “sane” values:

       •   sets cooked and echo modes,
       •   turns off cbreak and raw modes,
       •   turns on newline translation and
       •   resets any unset special characters to their default values

       before doing the terminal initialization described above.  Also, rather
       than  using  the  terminal initialization strings, it uses the terminal
       reset strings.

       The reset command is useful after a program dies leaving a terminal  in
       an abnormal state.

第一个清除屏幕，包括回滚缓冲区。最重要的是，第二个重置输入和输出。reset也有点慢。

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