linux 的包过滤功能,即 linux 防火墙,它由 netfilter 和 iptables 两个组件组成。netfilter 位于内核空间,由一些信息包过滤表组成,这些表包含内核用来控制信息包过滤处理的规则集。iptables 是一个命令行工具,位于用户空间,它使得插入、修改和删除信息包过滤表中的规则变得容易。
Containers and Kubernetes were not here when we started doing agile. But they change what used to be the hardest part: Applying agile beyond a small group, to the whole organization
More companies are trying agile and DevOps for a clear reason: Businesses want more speed and more experiments – which lead to innovations and competitive advantage. DevOps helps you gain that speed. But doing DevOps in a small group or startup and doing it at scale are two very different things. Any of us who’ve worked in a cross-functional group of 10 people, come up with a great solution to a problem, and then tried to apply the same patterns across a team of 100 people know the truth: It often doesn’t work. This path has been so hard, in fact, that it has been easy for IT leaders to put off agile methodology for another year.