https://blog.mulinux.com/en/tags/ssh/ Mulinux - Linux Operations & DevOps blog. Notes on Linux, Kubernetes, Docker and backend engineering. Hugo 0.160.0 & FixIt v0.4.5 en Wed, 17 Feb 2016 10:17:30 +0800 https://blog.mulinux.com/en/set-permitrootlogin-sudo/ Wed, 17 Feb 2016 10:17:30 +0800 https://blog.mulinux.com/en/set-permitrootlogin-sudo/ Operations <h2 class="heading-element" id="禁止root登录"><span>禁止root登录</span> <a href="#%e7%a6%81%e6%ad%a2root%e7%99%bb%e5%bd%95" class="heading-mark"> <svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg> </a> </h2><pre><code>vim /etc/ssh/sshd_config 加入一行： PermitRootLogin no</code></pre><h2 class="heading-element" id="切换到user1登录"><span>切换到user1登录</span> <a href="#%e5%88%87%e6%8d%a2%e5%88%b0user1%e7%99%bb%e5%bd%95" class="heading-mark"> <svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg> </a> </h2><pre><code>su - 用来初始化环境变量 $PATH $HOME等 sudo su到root需要输入root的密码不安全 visudo 编辑/etc/sudoers 配置文件 没有命令需安装 yum install -y sudo 格式： user host=(as_user) commands 比如： user1 ALL=(ALL) NOPASSWD: SU //它的意思是，让user1这个普通用户，拥有root的权限</code></pre>