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 <p id="2ND0OVCH">权限操作</p><p id="2ND0OVAE">权限：用户针对文件是否拥有 读、写、执行 的权利。</p><p id="2ND0OVAF">权限<strong>本身</strong>划分为：读Read、写Write、执行eXecute</p><p id="2ND0OVAG">权限针对<strong>用户</strong>的划分：主人User、同组用户Group、其他组用户Other</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2Fc8ae1147j00sdmmyg000yd000g0007ap.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p id="2ND0OVAI">zhoudong 写了一个歌词 双节棍.txt</p><p id="2ND0OVAJ">zhoudong(主人) music组 双节棍.txt 权限：读，写，执行</p><p id="2ND0OVAK">liming(同组) music组 双节棍.txt 权限：读，写</p><p id="2ND0OVAL">wangjing(其他组) movie组 双节棍.txt 权限：读</p><p id="2ND0OVAM">rwxrw-r-- zhoudong music 双节棍.txt</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F02067f93j00sdmmyh000ld000fz002tp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p>1. 权限的设置</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2Fdaecde4bj00sdmmyj0011d000g0006kp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F6bf230d6j00sdmmyk0017d000fw007cp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p id="2ND0OVAQ">字母方式设置权限：</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F470fd8cdj00sdmmym000pd000g00062p.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p id="2ND0OVAS">数字绝对方式设置权限：</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F7f74e42fj00sdmmyn000id000g0003kp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2Ffab077e3j00sdmmyo000fd000f60030p.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2Fbb9691b6j00sdmmyp000hd000g0006gp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p id="2ND0OVB0">数字、字母的取舍使用：</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F66aef19bj00sdmmyr000cd000fo0028p.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p>2. 使用权限2.1 文件对权限的使用</p><p id="2ND0OVB2"> 读：是否可以查看文件内容</p><p id="2ND0OVB3"> 写：是否可以修改该文件(可以强制写操作)</p><p id="2ND0OVB4"> 执行：① 二进制文件 ② 批量指令执行文件(windows批处理文件/linux shell脚本文件)</p><p id="2ND0OVB5">linux系统里边可以编写shell脚本程序文件，该文件执行过程中可以批量执行指令。(shell文件类似windows系统的批处理程序bat文件)</p><p id="2ND0OVB6">批处理程序bat文件可以在windows系统批量执行dos相关指令。</p><p id="2ND0OVB7">shell脚本程序文件在linux系统可以批量执行指令。</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F44a6b787j00sdmmyu000dd000g0002np.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F0838aae2j00sdmmyv0007d000ea001hp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F38b97822j00sdmmyx0016d000g0007cp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F9a24e648j00sdmmyz000bd000g0004fp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p id="2ND0OVBC">制作一个简答shell文件：</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F247a0ec2j00sdmmz0000fd000d60050p.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F4c723e4bj00sdmmz4001ad000g0008ap.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F36d051cdj00sdmmz60015d000g0008fp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p>2.2 目录对权限的使用</p><p id="2ND0OVBG"> 读：是否可以查看该目录内部的文件信息</p><p id="2ND0OVBH"> 写：是否可以给该目录创建、删除文件</p><p id="2ND0OVBI"> 执行：指定用户是否可以cd进入该目录</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F878ef186j00sdmmz8001ed000g0008sp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p id="2ND0OVBK">总结：</p><p id="2ND0OVBL">1. vi编辑器</p><p id="2ND0OVBM">a) 三种模式：命令、编辑、尾行</p><p id="2ND0OVBN">b) 尾行模式操作</p><p id="2ND0OVBO">:w :q :wq :w! :q! :wq!</p><p id="2ND0OVBP">:数字</p><p id="2ND0OVBQ">:/内容/</p><p id="2ND0OVBR">:set nu / :set nonu</p><p id="2ND0OVBS">:s/cont1/cont2/</p><p id="2ND0OVBT">:s/cont1/cont2/g</p><p id="2ND0OVBU">:%s/cont1/cont2/g</p><p id="2ND0OVBV">c) 命令模式操作</p><p id="2ND0OVC0">移动：字符级、单词、行级、段落、屏幕、文档</p><p id="2ND0OVC1">删除：dd ndd x cw</p><p id="2ND0OVC2">复制：yy nyy p</p><p id="2ND0OVC3">2. 权限操作</p><p id="2ND0OVC4">① 字母方式 rwx ugo</p><p id="2ND0OVC5">② 数字方式 4读2写1执行</p><p>3. 权限针对文件强制操作</p><p id="2ND0OVC6">对文件没有r或w写权限，还要修改该文件，可以!感叹号强制写保存。</p><p id="2ND0OVC7">A 对文件没有w写权限，可以强制写保存</p><p id="2ND0OVC8">B 对文件有w写权限、没有r读权限，强制写保存，新写入内容会覆盖文件原内容。</p><p id="2ND0OVC9">C 非主人(同组/其他组)用户，没有w写权限，强行写保存(或许成功、或许不成功)</p><p id="2ND0OVCA"> (①该文件的上级目录针对该修改者没有开放w写权限，强行写保存不成功)</p><p id="2ND0OVCB"> (②该文件的上级目录针对该修改者有开放w写权限，强行写保存成功)</p><p id="2ND0OVCC"> 强制修改成功后，文件的<strong>主人、组别</strong>变为修改者的主人、组别。</p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F22a18382j00sdmmza000wd000g0005sp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2Faee0b5baj00sdmmzc000id000g00030p.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2Fb457e145j00sdmmze000dd000g00048p.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p><p class="f_center"><img src="https://nimg.ws.126.net/?url=http%3A%2F%2Fdingyue.ws.126.net%2F2024%2F0517%2F70c7fdd9j00sdmmzg000yd000g0005zp.jpg&thumbnail=660x&quality=80&type=jpg"/><br/></p>