Tag: linux
All the articles with the tag "linux".
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Understanding printf vs echo in Bash
echo is convenient but inconsistent across systems; printf is portable and precise — know when to use each and avoid the gotchas.
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Understanding Grep: A Comprehensive Guide
grep is more powerful than you think — regex patterns, context flags, recursive search, and piping tricks that save hours of log digging.
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The Role of Antivirus and Endpoint Detection and Response Systems
AV vs EDR — traditional antivirus signatures vs behavioral endpoint detection. What each catches, what it misses, and what you actually need.
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Switch Ubuntu to Hardware Enablement (HWE)
The Ubuntu HWE kernel brings newer hardware support to LTS releases — how to switch from generic to HWE and what you gain.
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Essential Linux Commands for Daily Use
The Linux commands every sysadmin reaches for daily — file ops, process management, networking, and text manipulation you can't live without.
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Ubuntu Debian packages have been kept back error
Packages have been kept back during apt upgrade — what it means, why it happens, and how to safely install or hold those packages.
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Update a Single Package Using APT
Update just one package with apt without upgrading everything else — the right flags, version pinning, and held package gotchas.
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How to Transfer docker Images Without a Repository
Move Docker images between hosts without a registry using docker save and docker load — air-gapped deployments made simple.
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Copying Files Between Docker Containers and Host Machines
Use docker cp to move files between running containers and your host machine — no volumes needed for one-off file transfers.
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Docker Networking: Connecting to the Host from a Container
Access services on the host machine from inside a Docker container using host-gateway or host.docker.internal — no hardcoded IPs.
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Understanding Docker vs. Full Virtual Machines (VMs)
Containers share the kernel; VMs have their own. Understand the isolation trade-offs, overhead differences, and when to use which.
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Understanding the regreSSHion Vulnerability in OpenSSH
regreSSHion (CVE-2024-6387) is a remote code execution bug in OpenSSH — what it is, which versions are affected, and how to patch fast.