Authn primarily deals with user identity: who is this person? Is she who she says she is? There are a large number of systems that handle this “checkpoint” level of identity and access management and help to reduce the number of credentials that a user needs to provide, often through single sign-on (or SSO).

https://pgbackrest.org/

https://ipfs.io/ https://filecoin.io/

从 MacOS iTerm2 登录 CentOS 7 SSH Server , 出现如下错误：

https://cilium.io/ Cilium: Helping Linux Secure Microservices

qcow2 snapshot 有个内置和外置之分。

如果我们有一台 Linux 服务器有公网IP，如何将将内部IP和端口映射到这台有公网IP的服务器呢？

使用 CentOS 7 Cloud Image 创建 KVM 实例，出现奇怪的问题，etho0 网卡偶尔会失去 IP 。

参考：

hostnamectl 是 systemd 提供的一个非常方便的设置主机名工具。

Cloudflare's PKI and TLS toolkit https://cfssl.org/

openvswitch 与 openflow