Debian

Overclocking monitor in Linux

I made 60 Hz monitor to run at 80 Hz at max resolution

How to rename encrypted root volume

The problem: I’ve moved (by using pvmove) my root volume from an encrypted partition on my old drive to a new one. During that process I’ve called underlying device (encrypted partition) new_root. After successful move there is no more ‘old root’, but name stuck. I’m…

Creating VM image out of thin air

thin air == access only to mirrors

thin air == access only to repo mirrors

I got a stupid problem: I need to run a VM on my hypervisor. It’s the problem because my hypervisor is very local (no…

Speeding up CI/CD on dpkg-based systems

if you install packages with apt, you can make it faster

The problem: you have tons of packages to install. You are fine to wait in production (actually, you aren’t, but you have no options), but…

How to become a member of a group without relogin (Linux)

Today I found two things: one useful, an another from a realm of ‘too much’.

Useful part: how to become a member of a newly created group on your workstation without relogin/reboot? Let’s say you’ve…

go packaging: binary renaming

A stupid fight with dh_exec

… which is not the same as the test file we want to collect [pytest + dh_auto_build]

Yet another gory story from devops trenches.

I created a python application. I wanted to package it. I wrote setup.py, I wrote tests in tests/ directory, I got…

How to prevent sleep until script finish

(how to temporary forbid sleep and suspend)

Autosuspend is a great feature. Your PC goes into suspend (sleep) after some inactivity period. But if you have some long-running job (backup, computation…

Buggy timezone module in Ansible

If you ever saw this:

fatal: [server]: FAILED! => {"changed": false, "msg": "Error message:\nstill not desired state, though changes have made\nOther message(s):\nAdded 1 line and deleted 1 line(s) on /etc/timezone"}