如何正确管道命令在Cygwin（使用Windows）？ [英] How to correctly pipe commands in Cygwin (Using Windows)?

问题描述

我试图在文本文件上运行实验来获取字频率。我尝试使用以下命令：

  gawk -F[，'\。]-v RS = '{for（i = 1; i <= NF; i ++）words [$ i] ++;} END {for（i in words）print words [i]i}'myfile.txt | uniq -c | sort -nr | head -10 
  

但我得到以下错误：

  gawk：cmd。line：1：fatal：无法打开文件'|'进行读取（无此文件或目录）
  

我读某处在Windows机器上可以使用';'代替'|'，虽然这会导致类似的错误。 p>

似乎它正在读取'|'作为文件名的第一个实例，这是在Windows机器上的管道的正确方法吗？机器使用Cygwin？

编辑：我添加cygwin到windows的PATH变量，然后使用cmd窗口如果我想真正使用cygwin.exe，这意味着我会有要在C：/ cygwin中放置我想要编辑的任何文件？

解决方案

！从cygwin执行cygwin命令，而不是从Windows。要对任何文件执行cygwin命令，只需给命令文件的完整路径（但以 / cygdrive / 开头），它不必在 C：/ cygwin ，例如从cygwin shell窗口查看常见的Windows文件夹中的内容 C：\Documents和设置：

  $ ls -Q'/ cygdrive / c /文档和设置'
所有用户默认默认用户desktop.iniemorton b $ b  

I'm trying to run experiments on a text file to get word frequencies. I tried using the following command:

gawk -F"[ ,'\".]" -v RS="" '{for(i=1;i<=NF;i++) words[$i]++;}END{for (i in words) print words[i]" "i}' myfile.txt | uniq -c | sort -nr | head  -10

But I get the following error:

gawk: cmd. line:1: fatal: cannot open file '|' for reading (No such file or directory)

I read somewhere that ';' may be used instead of '|' on Windows machines, although this results in a similar error.

It seems as though it is reading the first instance of '|' as a file name. Is this the correct way of piping on a windows machine? Is piping possible on a windows machine using Cygwin?

EDIT: I added cygwin to windows PATH variable and then used cmd window. If i wanted to actually use cygwin.exe, does that mean I would have to place any files I wanted to edit within C:/cygwin ?

解决方案

OK, now I understand - don't do that! Execute cygwin commands from cygwin, not from Windows. To execute a cygwin command on any file, just give the command the full path to the file (but starting with /cygdrive/), it doesn't have to be under C:/cygwin, e.g. from a cygwin shell window to see what's in the common Windows folder C:\Documents and Settings:

$ ls -Q '/cygdrive/c/Documents and Settings'
"All Users"  "Default"  "Default User"  "desktop.ini"  "emorton" etc...

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