David Cao

David Cao

David is a Cloud & DevOps Enthusiast. He has years of experience as a Linux engineer. He had working experience in AMD, EMC. He likes Linux, Python, bash, and more. He is a technical blogger and a Software Engineer. He enjoys sharing his learning and contributing to open-source.

4 ways to check network usage in Linux

By keeping an eye on your network usage, you can make sure that your system is running smoothly and efficiently. If you’re using Linux, there are a few different ways that you can check your network usage. In this blog…

What is sparse file and how to check it?

A sparse file is a type of computer file that has holes in it. These holes don’t contain actual data. A spare file only allocates disk space for the data that are actually stored. This allows a sparse file to…

5 useful Linux network troubleshooting commands

Boost Your Network Skills Must-Learn Linux Commands for Pros

Here are five commands that we can use to troubleshoot network issues in Linux. ifconfig:  the ifconfig command is used to view and configure network interface parameters.  netstat: The netstat command is used to display network connections, routing tables, and…

What is 0.0.0.0 ip address?

Have you ever seen the 0.0.0.0 address and wondered what it means? This is a special IP address that represents all interfaces on a machine. In this blog post, we will discuss what the 0.0.0.0 address is used for and…

6 ways to use netstat command in Linux

The netstat command is one of the most powerful and useful commands in Linux. It can be used to troubleshoot network problems, find out what processes are using network sockets, and much more. In this blog post, we will discuss…

2 Easy ways to fix cd: Permission denied

If you’re getting an error like “cd: Permission denied” when trying to change directories in Bash, don’t worry, you’re not alone. This is a common issue that can be fixed fairly easily. In this blog post, we will discuss two…

Understanding SSH StrictHostKeyChecking Option

The SSH option StrictHostKeyChecking is a security feature that affects how SSH verifies the identity of a remote computer when connecting to it. It determines whether strict host checking is enabled or disabled.  When this option is enabled, the client…