MacOS 常用命令同 GNU/Linux 发行版不太一样。

gitlab runner 解析自定义域名有些问题，因此搭建一个 dnsmasq 服务.

访问 https://www.draw.io/ 可以使用在线版本画图。也是本地部署：

在容器(Docker)中运行 nginx 常遇到一些“特别”的问题。

ZFS Snapshot 非常方便，开销小。不过，对于备份数据来讲，创建 snapshot 的频率越高（比如1小时一次）， 占用存储空间越大，因此定期删除非常重要。

简单方法：

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。