企业官网建设流程全解析

一台服务器做两个网站吗,百度邮箱注册入口,wordpress团购主题,免费企业名录软件一、基本概念首先#xff0c;我们要知道#xff0c;Linux下有两种用户#xff1a;超级用户#xff08;root#xff09;、普通用户。超级用户#xff1a;可以在linux系统下做任何事情#xff0c;不受限制普通用户#xff1a;在linux下做有限的事情。超级用户的命令提示符…一、基本概念首先我们要知道Linux下有两种用户超级用户root、普通用户。超级用户可以在linux系统下做任何事情不受限制普通用户在linux下做有限的事情。超级用户的命令提示符是“#”普通用户的命令提示符是“$”命令su [用户名] 功能切换用户。 例如要从root用户切换到普通用户user则使用su user。 要从普通用户user切换到root用户则使用su rootroot可以省略此时系统会提示输入root用户的口令。 实例在这里插入图片描述在这里我们再介绍一个su -用法是一样的有一点不同su只切换用户身份但保持原用户的工作环境环境变量、工作目录等。 su - 或 su -l切换用户身份并同时切换到该用户的完整登录环境。实例在这里插入图片描述说明基本都知道 从超级用户-普通用户权限降低 从普通用户-超级用户权限提高 提高有什么用简单来说因为很多文件不允许普通用户操作。二、Linux权限管理2.1 “权限”详解首先我们要知道权限是什么权限的本质就是能或者不能做什么事情其次为什么要有权限在日常生活中我们都听过“谁谁谁没有权限做什么操作……” 权限就是为了控制用户的行为防止错误的发生。 这里也很好理解权限首先限制的是角色谁有我的权限权限还要求目标必须具备对应的属性也就是我想在LeetCode上玩游戏但是它不具备玩游戏的“属性”呀。 所以权限角色目标权限属性目标有什么权限 通俗一点哪个角色有目标的什么权限。 在Linux下一切皆文件面对的都是文件那文件有什么权限呢–读、写、执行2.2 权限角色目标权限属性看现象 下面我们来看一下我在一个目录下列出该目录下所以文件和目录的详细信息在这里插入图片描述这里显示的就是文件或者目录的属性因为文件不仅仅是内容文件内容属性。 那我们来详解一下这些属性都代表什么意思在这里插入图片描述在这里插入图片描述在这里插入图片描述角色前面我们说到权限角色目标权限属性那在Linux中角色有什么呢在上图我们看到有所有者所属组那对于每一个角色都要一一列举嘛显然不是除了这两个其它的角色都称为“其它”所以在Linux中www.dongchedi.com/article/7594897166766965272www.dongchedi.com/article/7594897310665245246www.dongchedi.com/article/7594897192310407705www.dongchedi.com/article/7594897631617794585www.dongchedi.com/article/7594896580080435737www.dongchedi.com/article/7594895704896684568www.dongchedi.com/article/7594897374330503705www.dongchedi.com/article/7594895618720449048www.dongchedi.com/article/7594896034183397912www.dongchedi.com/article/7594896087656694334www.dongchedi.com/article/7595300698343260734www.dongchedi.com/article/7595300086620734014www.dongchedi.com/article/7595300794661257753www.dongchedi.com/article/7595300922285146649www.dongchedi.com/article/7595300794661159449www.dongchedi.com/article/7595301535278858814www.dongchedi.com/article/7595300053246837310www.dongchedi.com/article/7595298997771141656www.dongchedi.com/article/7595298747215987224www.dongchedi.com/article/7595298653444080190www.dongchedi.com/article/7595299173835276862www.dongchedi.com/article/7595293834620191257www.dongchedi.com/article/7595294214674596377www.dongchedi.com/article/7595294735703966270www.dongchedi.com/article/7595294214674825753www.dongchedi.com/article/7595269939515703870www.dongchedi.com/article/7595270106293600793www.dongchedi.com/article/7595268901785584153www.dongchedi.com/article/7595268784974545433www.dongchedi.com/article/7595270592459506238www.dongchedi.com/article/7595268816629219865www.dongchedi.com/article/7595267640395235902www.dongchedi.com/article/7595267822872166937www.dongchedi.com/article/7595266120056422936www.dongchedi.com/article/7595265326464795161www.dongchedi.com/article/7595264479055970878www.dongchedi.com/article/7595263814942376472www.dongchedi.com/article/7595263889965924926www.dongchedi.com/article/7595264219466121753www.dongchedi.com/article/7595261441830486590www.dongchedi.com/article/7595257155528409624www.dongchedi.com/article/7595257148431974937www.dongchedi.com/article/7595255577883198014www.dongchedi.com/article/7595257264999858713www.dongchedi.com/article/7595255131160085054www.dongchedi.com/article/7595254038942401086www.dongchedi.com/article/7595272535034430014www.dongchedi.com/article/7595273235844137496www.dongchedi.com/article/7595271162356302398www.dongchedi.com/article/7595269071357231641www.dongchedi.com/article/7595269220477567512www.dongchedi.com/article/7595268287076958782www.dongchedi.com/article/7595269071357264409www.dongchedi.com/article/7595268315833270809www.dongchedi.com/article/7595265492903363096www.dongchedi.com/article/7595265055567299096www.dongchedi.com/article/7595265773019841049www.dongchedi.com/article/7595265891500114494www.dongchedi.com/article/7595264904798978585www.dongchedi.com/article/7595263429863195161www.dongchedi.com/article/7595261995696800280www.dongchedi.com/article/7595258440394818073www.dongchedi.com/article/7595256795065893401www.dongchedi.com/article/7595256961541767704www.dongchedi.com/article/7595257257731408446www.dongchedi.com/article/7595253896583774745www.dongchedi.com/article/7595252944199778841