yum工具在linux环境下都是事先预装好的，当我们使用时，会出现Error: rpmdb open failed。那么，我们怎么解决呢？依次输入以下命令：cd /var/lib/rpm; rm -f __db.*; rpm --rebuilddb; yum clean all; 这几个命令的意思...

阿里云ECS Linux服务器用Putty进行SSH连接超时(Network error:Conection timed out)

刚买的ECS Linux服务器，准备用Putty进行本地SSH连接，结果死活连不上，一直是下面这图。百思不解，不知什么原因。PS：公网ip可以ping通，且安全组内的22端口已放行，阿里云管理控制台的远程连接可以正常使用。

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更新时间 2024-02-16 09:34:18

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