10 important Linux File System Terminology and Concepts
File system is an important part of Linux world. We collect 10 useful file system concepts below to help you understand what file system is. Important File system Concepts
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.
Linux File System: Raw IO and Direct IO
Raw IO and Direct IO are both bypassing file system cache. Here are more details about these two IOs. This can help us understand the difference and troubleshoot easier when we get a file system issue. Difference Between RAW IO…
How to Check if a Disk is Busy in Linux
This article is part of the following series. Disk utilization in iostat command is a key metric to check if a disk is busy or not in Linux. It is used to calculate the time percent that a disk…
Understanding Maxdepth Mindepth Depth In Linux Find Command
The find command walks a directory tree and acts on files that match your criteria. By default it descends into every subdirectory, no matter how deep. That’s often more than you want. Three options give you control over how deep find goes and in what order it reports results:…
What is IOwait on Linux
Linux IOwait is a common Linux performance issue. Today we will look at what iowait means and what contributes to this problem. Hope this can give you more ideas about high IOwait issue. IOwait on Linux The iowait column on…
Check DNS Records with Examples – PTR MX SRV CNAME AAAA
DNS is a very critical part of the Linux operation world. We will cover the most common DNS records today. All domains are required to have at least a few essential DNS records for a user to be able to…
4 ways to Check DNS Record with dig Command in Linux
The most efficient way to check DNS records in Linux is using dig command. This command will send the DNS query to the name servers listed in the resolver(). It allows you to query information about various DNS records, including…
4 Commands to Check HBA WWN WWNN WWPN on Linux
Introduction If you work with Fibre Channel (FC) storage, sooner or later you’ll need to find your server’s HBA (Host Bus Adapter) identifiers. Whether you’re zoning a SAN switch, presenting a LUN from a storage array, or troubleshooting a multipath…
How to Find disk SCSI ID WWIDS In Linux
On Linux disk SCSI ID uniquely identifies each SCSI device on the SCSI bus. A unique SCSI ID is generated when a scsi disk is added to Linux system. SCSI ID can be used for representing a disk in the…
3 Ways to Open a port in Linux
How to open a port on Linux is a common question when testing a firewall-related problem. In this article, we will use nc command and Python code to open a TCP port manually on Linux and check if this port…