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Double Dash

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[系统(linux) 所属分类 系统(linux) | 发布者 店小二05 | 时间 2016 | 作者 红领巾 ] 0人收藏点击收藏

If you're anything like me you'll find your directories liberally scattered with some pretty strange directory and file names.

$ ls -la -rw-r--r-- 1 gypsydave5 1482096370 647 11 Oct 20:15 :w drwxr-xr-x 2 gypsydave5 1482096370 68 10 Feb 08:55 -p/ -rw-r--r-- 1 gypsydave5 1482096370 2900 11 Oct 20:15 \(

Hopefully you're nothing like me and you never get this, but I'm both a sloppy and impatient typist and so I will

occasionally often mash the keyboard in Vim and name a file after the write command, or somehow create a directory called -p because I was using the recursive flag on mkdir

.

On that subject, let's try and get rid of the -p directory:

$ rm -rf -p rm: illegal option -- p usage: rm [-f | -i] [-dPRrvW] file ... unlink file

Hmmm, that sucks. What about...

$ rm -rf "-p" rm: illegal option -- p usage: rm [-f | -i] [-dPRrvW] file ... unlink file

Boo. Happily there's a *nix convention to help with these situations: -- . Double-dash tells the command you're running that everything that comes after it is not to be treated as a command option, but is instead a filename. So:

$ rm -rf -- -p $ ls -la -rw-r--r-- 1 gypsydave5 1482096370 647 11 Oct 20:15 :w -rw-r--r-- 1 gypsydave5 1482096370 2900 11 Oct 20:15 (

DISCO!

This behaviour is implemented in most of the command line tools you'll use on a *nix system - it's useful to know.

本文系统(linux)相关术语:linux系统 鸟哥的linux私房菜 linux命令大全 linux操作系统

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