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-<!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=2"><meta name="theme-color" content="#FFF"><link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon.png"><link rel="icon" type="image/ico" sizes="32x32" href="/images/favicon.ico"><meta http-equiv="Cache-Control" content="no-transform"><meta http-equiv="Cache-Control" content="no-siteapp"><link rel="alternate" type="application/rss+xml" title="涛声依旧" href="https://blog.jingxiyuan.cn/rss.xml"><link rel="alternate" type="application/atom+xml" title="涛声依旧" href="https://blog.jingxiyuan.cn/atom.xml"><link rel="alternate" type="application/json" title="涛声依旧" href="https://blog.jingxiyuan.cn/feed.json"><link rel="stylesheet" href="//fonts.googleapis.com/css?family=Mulish:300,300italic,400,400italic,700,700italic%7CFredericka%20the%20Great:300,300italic,400,400italic,700,700italic%7CNoto%20Serif%20JP:300,300italic,400,400italic,700,700italic%7CNoto%20Serif%20SC:300,300italic,400,400italic,700,700italic%7CInconsolata:300,300italic,400,400italic,700,700italic&display=swap&subset=latin,latin-ext"><link rel="stylesheet" href="/css/app.css?v=0.0.0"><link rel="canonical" href="https://blog.jingxiyuan.cn/categories/Linux/Shell/"><title>分类：Shell | ☆∵∴Hito∴∵★ = 涛声依旧 = 天下事有难易乎？为之，则难者亦易矣</title><meta name="generator" content="Hexo 6.3.0"></head><body itemscope itemtype="http://schema.org/WebPage"><div id="loading"><div class="cat"><div class="body"></div><div class="head"><div class="face"></div></div><div class="foot"><div class="tummy-end"></div><div class="bottom"></div><div class="legs left"></div><div class="legs right"></div></div><div class="paw"><div class="hands left"></div><div class="hands right"></div></div></div></div><div id="container"><header id="header" itemscope itemtype="http://schema.org/WPHeader"><div class="inner"><div id="brand"><div class="pjax"><h1 itemprop="name headline">分类于"Shell"的文章</h1></div></div><nav id="nav"><div class="inner"><div class="toggle"><div class="lines" aria-label="切换导航栏"><span class="line"></span> <span class="line"></span> <span class="line"></span></div></div><ul class="menu"><li class="item title"><a href="/" rel="start">☆∵∴Hito∴∵★</a></li></ul><ul class="right"><li class="item theme"><i class="ic i-sun"></i></li><li class="item search"><i class="ic i-search"></i></li></ul></div></nav></div><div id="imgs" class="pjax"><ul><li class="item" data-background-image="https://tva3.sinaimg.cn/large/6833939bly1giclwuom7cj20zk0m8dvn.jpg"></li><li class="item" data-background-image="https://tva3.sinaimg.cn/large/6833939bly1giciub8ja1j20zk0m81ky.jpg"></li><li class="item" data-background-image="https://tva3.sinaimg.cn/large/6833939bly1gipeubcbajj20zk0m8h1h.jpg"></li><li class="item" data-background-image="https://tva3.sinaimg.cn/large/6833939bly1gicitf0kl1j20zk0m87fe.jpg"></li><li class="item" data-background-image="https://tva3.sinaimg.cn/large/6833939bly1gipeybxm1pj20zk0m8niv.jpg"></li><li class="item" data-background-image="https://tva3.sinaimg.cn/large/6833939bly1gipewkhf1zj20zk0m81kx.jpg"></li></ul></div></header><div id="waves"><svg class="waves" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto"><defs><path id="gentle-wave" d="M-160 44c30 0 58-18 88-18s 58 18 88 18 58-18 88-18 58 18 88 18 v44h-352z"/></defs><g class="parallax"><use xlink:href="#gentle-wave" x="48" y="0"/><use xlink:href="#gentle-wave" x="48" y="3"/><use xlink:href="#gentle-wave" x="48" y="5"/><use xlink:href="#gentle-wave" x="48" y="7"/></g></svg></div><main><div class="inner"><div id="main" class="pjax"><div class="collapse wrap"><h2 class="item header"><a href="/categories">全部</a> <small>/</small> <a href="/categories/Linux/">Linux</a> <small>/</small> Shell <small>分类</small></h2><article class="item normal" itemscope itemtype="http://schema.org/Article"><div class="meta"><time itemprop="dateCreated" datetime="2022-11-02T16:29:00+08:00" content="2022-11-02">11-02</time></div><div class="title"><a href="/2022/11/02/2-dev-null%E5%92%8C-dev-null-2-1%E5%92%8C2-1-dev-null%E7%9A%84%E5%8C%BA%E5%88%AB/" itemprop="url"><span itemprop="name">2>/dev/null和>/dev/null 2>&1和2>&1>/dev/null的区别</span></a></div></article></div></div><div id="sidebar"><div class="inner"><div class="panels"><div class="inner"><div class="contents panel pjax" data-title="文章目录"></div><div class="related panel pjax" data-title="系列文章"></div><div class="overview panel" data-title="站点概览"><div class="author" itemprop="author" itemscope itemtype="http://schema.org/Person"><img class="image" itemprop="image" alt="Hito Li" data-src="/images/avatar.jpg"><p class="name" itemprop="name">Hito Li</p><div class="description" itemprop="description">天生Line truncated
+<!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=2"><meta name="theme-color" content="#FFF"><link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon.png"><link rel="icon" type="image/ico" sizes="32x32" href="/images/favicon.ico"><meta http-equiv="Cache-Control" content="no-transform"><meta http-equiv="Cache-Control" content="no-siteapp"><link rel="alternate" type="application/rss+xml" title="涛声依旧" href="https://blog.jingxiyuan.cn/rss.xml"><link rel="alternate" type="application/atom+xml" title="涛声依旧" href="https://blog.jingxiyuan.cn/atom.xml"><link rel="alternate" type="application/json" title="涛声依旧" href="https://blog.jingxiyuan.cn/feed.json"><link rel="stylesheet" href="//fonts.googleapis.com/css?family=Mulish:300,300italic,400,400italic,700,700italic%7CFredericka%20the%20Great:300,300italic,400,400italic,700,700italic%7CNoto%20Serif%20JP:300,300italic,400,400italic,700,700italic%7CNoto%20Serif%20SC:300,300italic,400,400italic,700,700italic%7CInconsolata:300,300italic,400,400italic,700,700italic&display=swap&subset=latin,latin-ext"><link rel="stylesheet" href="/css/app.css?v=0.0.0"><link rel="canonical" href="https://blog.jingxiyuan.cn/categories/Linux/Shell/"><title>分类：Shell | ☆∵∴Hito∴∵★ = 涛声依旧 = 天下事有难易乎？为之，则难者亦易矣</title><meta name="generator" content="Hexo 6.3.0"></head><body itemscope itemtype="http://schema.org/WebPage"><div id="loading"><div class="cat"><div class="body"></div><div class="head"><div class="face"></div></div><div class="foot"><div class="tummy-end"></div><div class="bottom"></div><div class="legs left"></div><div class="legs right"></div></div><div class="paw"><div class="hands left"></div><div class="hands right"></div></div></div></div><div id="container"><header id="header" itemscope itemtype="http://schema.org/WPHeader"><div class="inner"><div id="brand"><div class="pjax"><h1 itemprop="name headline">分类于"Shell"的文章</h1></div></div><nav id="nav"><div class="inner"><div class="toggle"><div class="lines" aria-label="切换导航栏"><span class="line"></span> <span class="line"></span> <span class="line"></span></div></div><ul class="menu"><li class="item title"><a href="/" rel="start">☆∵∴Hito∴∵★</a></li></ul><ul class="right"><li class="item theme"><i class="ic i-sun"></i></li><li class="item search"><i class="ic i-search"></i></li></ul></div></nav></div><div id="imgs" class="pjax"><ul><li class="item" data-background-image="https://tva1.sinaimg.cn/large/6833939bly1gipeubcbajj20zk0m8h1h.jpg"></li><li class="item" data-background-image="https://tva1.sinaimg.cn/large/6833939bly1gicljgocqbj20zk0m8e81.jpg"></li><li class="item" data-background-image="https://tva1.sinaimg.cn/large/6833939bly1giciusoyjnj219g0u0x56.jpg"></li><li class="item" data-background-image="https://tva1.sinaimg.cn/large/6833939bly1giclg5ms2rj20zk0m8u0x.jpg"></li><li class="item" data-background-image="https://tva1.sinaimg.cn/large/6833939bly1gicit4jrvuj20zk0m8785.jpg"></li><li class="item" data-background-image="https://tva1.sinaimg.cn/large/6833939bly1giclimtf7dj20zk0m8qav.jpg"></li></ul></div></header><div id="waves"><svg class="waves" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto"><defs><path id="gentle-wave" d="M-160 44c30 0 58-18 88-18s 58 18 88 18 58-18 88-18 58 18 88 18 v44h-352z"/></defs><g class="parallax"><use xlink:href="#gentle-wave" x="48" y="0"/><use xlink:href="#gentle-wave" x="48" y="3"/><use xlink:href="#gentle-wave" x="48" y="5"/><use xlink:href="#gentle-wave" x="48" y="7"/></g></svg></div><main><div class="inner"><div id="main" class="pjax"><div class="collapse wrap"><h2 class="item header"><a href="/categories">全部</a> <small>/</small> <a href="/categories/Linux/">Linux</a> <small>/</small> Shell <small>分类</small></h2><article class="item normal" itemscope itemtype="http://schema.org/Article"><div class="meta"><time itemprop="dateCreated" datetime="2022-11-02T16:29:00+08:00" content="2022-11-02">11-02</time></div><div class="title"><a href="/2022/11/02/2-dev-null%E5%92%8C-dev-null-2-1%E5%92%8C2-1-dev-null%E7%9A%84%E5%8C%BA%E5%88%AB/" itemprop="url"><span itemprop="name">2>/dev/null和>/dev/null 2>&1和2>&1>/dev/null的区别</span></a></div></article></div></div><div id="sidebar"><div class="inner"><div class="panels"><div class="inner"><div class="contents panel pjax" data-title="文章目录"></div><div class="related panel pjax" data-title="系列文章"></div><div class="overview panel" data-title="站点概览"><div class="author" itemprop="author" itemscope itemtype="http://schema.org/Person"><img class="image" itemprop="image" alt="Hito Li" data-src="/images/avatar.jpg"><p class="name" itemprop="name">Hito Li</p><div class="description" itemprop="description">天生Line truncated