☰

如何在手册页中搜索“！”（感叹号）？

tag-icon • tag-icon documentation manpage
如何在手册页中搜索“！”（感叹号）？

我想获得!选项的解释（这意味着排除)find在 的指挥下man find。

然后我按下/，弹出shift + 1一个，而不是所以我的问题是如何在手册页中 搜索？Non-match!!

图像

答案1

默认man寻呼机是less。如果你查看less的帮助（h在帮助中按），你会看到：

                          SEARCHING

  /pattern          *  Search forward for (N-th) matching line.
  ?pattern          *  Search backward for (N-th) matching line.
  n                 *  Repeat previous search (for N-th occurrence).
  N                 *  Repeat previous search in reverse direction.
  ESC-n             *  Repeat previous search, spanning files.
  ESC-N             *  Repeat previous search, reverse dir. & spanning files.
  ESC-u                Undo (toggle) search highlighting.
  &pattern          *  Display only matching lines
        ---------------------------------------------------
        A search pattern may be preceded by one or more of:
        ^N or !  Search for NON-matching lines.

或者man less：

/pattern
      Search forward in the file for the N-th line containing the pat‐
      tern.  N defaults to 1.  The pattern is a regular expression, as
      recognized  by  the  regular expression library supplied by your
      system.  The search starts at the first line displayed (but  see
      the -a and -j options, which change this).

      Certain  characters  are  special if entered at the beginning of
      the pattern; they modify the type of search rather  than  become
      part of the pattern:

      ^N or !
             Search for lines which do NOT match the pattern.

因此，just 模式!是一个空模式（匹配任何内容）否定- 因此没有什么可以匹配它。

您必须通过使用反斜杠 ( ) 或以其他方式使其成为正则表达式的第一个字符（例如），来逃避!模式开始时的意义。\!/[!]

另一种方法是使用grep：

$ man find | grep !
       with  `-', or the argument `(' or `!'.  That argument and any following
       ! expr True  if  expr  is false.  This character will also usually need
              Same as ! expr, but not POSIX compliant.
       The POSIX standard specifies parentheses `(', `)', negation `!' and the
       find /sbin /usr/sbin -executable \! -readable -print
       find . -perm -444 -perm /222 ! -perm /111
       find . -perm -a+r -perm /a+w ! -perm /a+x
       -perm  /222 or -perm /a+w) but are not executable for anybody ( ! -perm
       /111 and ! -perm /a+x respectively).
       find . -name .snapshot -prune -o \( \! -name *~ -print0 \)|

答案2

您需要\在输入之前输入!，这样它才不会被解释为搜索中的否定正则表达式。

答案3

另一种方法是：

man --html=firefox find

在 Firefox 中打开手册页后，按CTRL+F可搜索任意字符。

相关内容