--- title: "David Cao (@linux732) | Hashnode" description: "Owner of howtouselinux.com. I work as a Linux engineer for over 20 years. Now I am a technical blogger and Software Engineer. I enjoy sharing learning and co..." url: "https://hashnode.com/@linux732" --- @linux732 # David Cao @linux732 · Joined March 2021 ### [Top 5 DevOps Engineer Interview Questions and Tips](https://howtouselinux.hashnode.dev/top-5-devops-engineer-interview-questions-and-tips?utm_source=hashnode&utm_medium=feed) https://www.howtouselinux.com/web-stories/devops-engineer-interview-questions 1 min read · [howtouselinux.hashnode.dev](https://howtouselinux.hashnode.dev/top-5-devops-engineer-interview-questions-and-tips?utm_source=hashnode&utm_medium=feed) [Feb 21, 2024](https://hashnode.com/posts/top-5-devops-engineer-interview-questions-and-tips/65d5883b8e0450c65439e5c2) ### [Top 5 Key Points to Master Linux Networking: A Detailed Look](https://howtouselinux.hashnode.dev/top-5-key-points-to-master-linux-networking-a-detailed-look?utm_source=hashnode&utm_medium=feed) Hello, dear Linux community! Linux, an open-source powerhouse, is renowned for its robustness in handling intricate networking tasks. Whether you're a seasoned system administrator or just starting your journey in the Linux world, a solid grasp on Li... 3 min read · [howtouselinux.hashnode.dev](https://howtouselinux.hashnode.dev/top-5-key-points-to-master-linux-networking-a-detailed-look?utm_source=hashnode&utm_medium=feed) [Jul 16, 2023](https://hashnode.com/posts/top-5-key-points-to-master-linux-networking-a-detailed-look/64b368942704fc807e7e9b82) ### [Linux mac address](https://howtouselinux.hashnode.dev/linux-mac-address?utm_source=hashnode&utm_medium=feed) https://www.howtouselinux.com/post/linux-mac-address 1 min read · [howtouselinux.hashnode.dev](https://howtouselinux.hashnode.dev/linux-mac-address?utm_source=hashnode&utm_medium=feed) [Jun 17, 2023](https://hashnode.com/posts/linux-mac-address/648d5dafbd4f472d0902a873) ### [check directory size in linux](https://howtouselinux.hashnode.dev/check-directory-size-in-linux?utm_source=hashnode&utm_medium=feed) https://www.howtouselinux.com/post/check-directory-size-in-linux 1 min read · [howtouselinux.hashnode.dev](https://howtouselinux.hashnode.dev/check-directory-size-in-linux?utm_source=hashnode&utm_medium=feed) [Jun 4, 2023](https://hashnode.com/posts/check-directory-size-in-linux/647c71b8161dd026d3f8e6dd) ### [Howtouselinux newsletter](https://howtouselinux.hashnode.dev/howtouselinux-newsletter?utm_source=hashnode&utm_medium=feed) We hope this newsletter finds you well. This past month has been a busy one for HowToUseLinux, as we've been working hard to bring you the latest and greatest information. Firstly, we have two ways to fix the "cp Permission denied" error. This is a ... 2 min read · [howtouselinux.hashnode.dev](https://howtouselinux.hashnode.dev/howtouselinux-newsletter?utm_source=hashnode&utm_medium=feed) [May 2, 2023](https://hashnode.com/posts/howtouselinux-newsletter/6450ddc53776acc6304d11fd)