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.

How to use Linux systemctl command

systemctl is a command-line utility in Linux operating systems that is used to control and manage the system’s services, daemons, and other processes. It is an essential tool for system administrators and developers as it allows them to monitor and…

3 ways to check FIPS mode in Linux

FIPS is an acronym that stands for Federal Information Processing Standards. It is a set of standards and guidelines developed by the United States federal government to establish uniform requirements for information security, including computer security, data protection, and cryptography.…

2 ways to check selinux status in Linux

Security-Enhanced Linux (SELinux) is a security architecture for Linux systems that allows administrators to have more control over who can access the system. It was originally developed by the United States National Security Agency (NSA) as a series of patches…

3 ways to get AWS S3 bucket size

When it comes to Amazon Web Services (AWS), S3 is one of the most popular services. This is because S3 provides a secure and scalable storage solution for businesses of all sizes. In order to ensure that your S3 buckets…

3 ways to get AWS EC2 Instance ID

If you’re running a business on Amazon Web Services (AWS), then you know that instances are an important part of your infrastructure. It’s crucial to be able to identify your instances easily, so that you can manage them effectively. In…

Understanding /etc/resolv.conf file in Linux

The file is a configuration file used by the Linux operating system to store information about Domain Name System (DNS) servers. This file contains a list of DNS server addresses, as well as other options that control how DNS…

How to list repository in Linux

In Linux, a repository is a collection of software packages that are available for installation on your system. Think of it as an app store for Linux systems. Repositories make it easier to find, install and update applications, without having…

How to Find Your IP Address in Ubuntu Linux

If you’re having trouble connecting to the internet or other devices on the network, checking your IP address can help you determine if the issue is related to your network configuration. The ip addr command is used to display information…

2 ways to use Linux ip addr command

Are you tired of constantly struggling with network connectivity issues and not being able to identify the root cause? Look no further than the ‘ip addr’ command! This powerful command allows you to view and manipulate your network interfaces, providing…