All About Linux.

date prints the clock, and the argument after the plus sign decides which shape that clock comes out in. I ran date +%F on a UTC machine and got 2026-09-16, where the bare command printed Wed Sep 16 17:43:13 UTC 2026. That switch also produces the epoch number a script compares against and the ISO

CPU temperature on Linux has two correct answers and each one fails on the wrong machine. Install lm-sensors and run sensors, or read a file under /sys/class/thermal. A temperature appears only after a kernel driver recognises a sensor chip and publishes its registers as files. The first command is therefore a detection command, and the

Ping comes back clean and the service still refuses you, so the question moves from the host to the path between you and it. The traceroute command answers that question by making every router on the way report back. Each probe it sends leaves with a small time to live value, and the first router

To open a bin file in Linux, start with the bytes rather than the extension. I ask the file command to name the shape, because the same three letters cover a self-extracting installer, a disk image, a compiled program, and a heap of raw data. Each shape has its own two-command lane below, and I

Steam installs in one command on the distributions that package it, and the instructions that fail name a package their release dropped. Valve’s published apt line for 32-bit OpenGL support still asks for libgl1-mesa-glx, a name Ubuntu kept only as an empty leftover in 22.04. What you install first is a launcher rather than the

Bash keeps your history in two places, and the list that the history command prints is not the file the next shell reads. I ran history -c on a test session and printed the file straight afterwards, and every line was still in it. Clearing bash history means handling both stores, and the file is

Running a Linux command from Python takes one call, and the one you pick decides whether the output lands in a variable. os.system is the short version, and the number it returns is not the exit code you expect. subprocess.run runs the same command and hands back the text, the error text, and the plain

Disk partitioning tools on Linux all edit the same structure, a table that records which sectors belong to which partition. The trouble usually sits one layer below, where a partition entry and the filesystem inside it hold separate sizes. What those tools will do for you comes down to two rules. Unallocated space has to