Tag

#Linux

8 articles found

Diagram of Why a 9 GB build dies at 6 GB: 1. Job starts on ubuntu-26.04, 2. Build writes temp files, 3. Quota reached, 4. disk quota exceeded, 5. Fix applied.

Ubuntu 26.04 Puts /tmp in RAM: Big CI Builds Run Out

Ubuntu 26.04 mounts /tmp as a RAM disk with a per-user quota, so large builds fail with disk quota exceeded on the ubuntu-26.04 runner. How to check your job and the two-line fix.

#GitHub Actions#Linux#CI/CD

Neeraj Jha

October 28, 2026

Diagram of Will pip install here?: 1. You run pip install, 2. Inside a venv?, 3. Marker file present?, 4. pip.conf override?, 5. Refused.

3 min

ScriptingBeginnerNew

pip Says externally-managed-environment: What to Do

Why pip install now fails with externally-managed-environment on Ubuntu 24.04, Debian 12 and Homebrew, and the three fixes that work: a venv, pipx, or apt. Plus why it passes in GitHub Actions and fails in docker build.

#Python#Docker#Linux

Neeraj Jha

October 27, 2026

Diagram of What a stop and start does to one instance: 1. Stop pressed, 2. Charges pause, 3. Host released, 4. Public IP released, 5. Start pressed, 6. New public IP.

4 min

Cloud ComputingBeginnerNew

Stop, Start, Surprise: What Your EC2 Instance Forgets

What rebooting, stopping, hibernating and terminating an EC2 instance each keep and lose, from AWS's own comparison. Four actions that sound similar and are not, including the public IP that changes and the disk that vanishes.

#AWS#Linux

Neeraj Jha

October 23, 2026

A Bash script using set -euo pipefail, an ERR trap, a required argument and quoted expansions, each annotated.

9 min

ScriptingBeginner

Shell Scripting for DevOps: Essential Bash Automation

Learn essential Bash scripting for DevOps — variables, conditionals, loops, functions, error handling, cron jobs, and practical one-liners.

#Linux

Neeraj Jha

Updated October 24, 2026

159

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A five-step container hardening list beside a docker run command that drops capabilities and runs read-only.

10 min

SecurityAdvanced

Securing Docker Containers, in Order of What It Buys You

The same ten-item checklist, ordered by the threat each item actually closes — and honest about which three matter most and what none of them protect you from.

#Docker#Linux

Neeraj Jha

Updated October 31, 2026

169

Diagram: an Ansible control node running a playbook over SSH against three web hosts from its inventory.

7 min

InfrastructureBeginner

Ansible for DevOps: Automating Server Configuration

Get started with Ansible for server automation — inventory, playbooks, roles, common modules, and best practices for DevOps workflows.

#Ansible#Linux

Neeraj Jha

September 11, 2026

157

Diagram: nginx terminating TLS for a client and proxying to three upstream application servers.

7 min

InfrastructureIntermediate

Nginx as a Reverse Proxy: The Config, and What Breaks

The six lines that proxy, the four headers most examples omit, and the three failures a reverse proxy actually produces — 502, 504 and the 499 nobody receives.

#Nginx#Linux#SRE

Neeraj Jha

March 5, 2026

529