Basic Linux commands are key skills for Linux beginners. We collect 10 basic Linux commands to help Linux beginners learn faster. If you want to get a job as Linux admin or Cloud engineer, the command line is fundamental. We…
Linux commands are very important for Linux beginners. Here are 12 basic Linux commands for Linux tasks. Hope this can help beginners learn Linux quickly. pwd command – prints the current working directory It prints the location of your current…
The cat (concatenate) command is one of the most frequently used utilities in Unix/Linux systems. While it’s often seen simply showing file contents, it can do much more—including creating, combining, inspecting, and transforming text streams efficiently. Below are 10 practical,…
You’ve dipped your toes into tcpdump, maybe caught a few web packets or seen your router chatting away. That’s a great start! But what if you need to go deeper? What if you’re chasing a phantom network issue, analyzing application…
When network issues strike, tcpdump is often the first tool professionals reach for. It’s like a microscope for your network — allowing you to see every packet traveling in and out of your system. But without filters, tcpdump captures everything,…
The hardware vendor info or serial number can be very helpful to open a support case for Linux admins. We will cover this topic today to get this info from Linux system. We will use dmidecode command to get this…
“No space left on device” (ENOSPC) usually means exactly what it says—the disk is full. But every so often you hit this error while df still shows plenty of free space, which is understandably confusing. This guide walks through the troubleshooting process…
Rsync is a unique, full-featured file transfer facility. It can perform differential uploads and downloads (synchronization) of files across the network, transferring only data that has changed. For example, if there is a local copy of a 50MB file and…
Sometimes when we ssh to Linux box, we get this error “WARNING: Your password has expired.” You must change your password now and login again! Changing password for user ocp. Changing password for ocp.” What does “WARNING: Your password has…
Rp_filter is short for reverse path filtering on Linux. We can use this to filter packets on Linux. Here are 5 common questions about rp_filter. What is reverse path filtering? Reverse path filtering is a mechanism adopted by the Linux…
