定期删除 ZFS Snapshot

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。

MacOS 下安装 python3 & pip3

简单方法:

authz & authn

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).

PostgreSQL 备份

https://pgbackrest.org/

IPFS

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

SSH 登录出现 LC_CTYPE 错误

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

cilium - API-aware Networking and Security

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

qcow2 snapshot

qcow2 snapshot 有个内置和外置之分。

通过 iptables 完成端口转发

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?

CentOS 7 DHCP (dhclient) 错误跟踪

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 。

owncloud 使用总结

参考:

使用 hostnamectl 配置主机名

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