- temporary:
sudo service stop mydesktop - permanent:
sudo systemctl disable mydesktop
- get local DNS server address:
cat /etc/resolv.conf - get list of DNS servers:
netplan get all - show who is listening on port 53
netstat -peanut(withoutlsof)
Vladimir Kotal vladak
vladak
/ docker-ubuntu.md
Last active
May 27, 2021 15:26
creating docker image behind proxy on Ubuntu
vladak
/ OpenGrok.md
Last active
May 29, 2019 14:48
What is OpenGrok
- blindingly fast source code search and cross-reference engine
- can be used for searching and source code browsing
- “grok” = profoundly understand
- in our case, source code
- the IP/project is still owned by Oracle
- developed as open source (CDDL license)
- Searching computer programs that use different semantics
- written in Java/JSP
- originally developed as a tool perform security vulnerability research quickly
xrandr --addmode DP-2 1440x900
vladak
/ ips-mediator-hell.md
Last active
August 24, 2021 08:01
IPS mediators - mixing version and implementation
Question: is mixing mediator-version with mediator-implementation in Solaris IPS a good idea ?
TLDR answer: no, generally it's not
Suppose we have 2 packages that mediate usr/include/moomin (also they deliver symlinks in lib which is not really mediated since the link names differ), the foo package mediates using the mediator-version, the bar package mediates using mediator-implementation:
uls-0:/builds/vkotal/ips$ grep -v ^# foo.p5m
set name=pkg.fmri [email protected],5.11-0
vladak
/ docker-notes.md
Last active
March 3, 2022 09:54
https://stackoverflow.com/questions/23111631/cannot-download-docker-images-behind-a-proxy
mkdir /etc/systemd/system/docker.service.d
cat << EOF > /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY=http://proxy.example.com:80/"
The LSI card does not support disks larger than 2 GiB.
nice infographics on https://www.reddit.com/r/MechanicalKeyboards/comments/jihbhi/custom_mechanical_keyboard_infographic_v30_is_now/
Cherry MX Brown - to make it similar to the Sun Type 7 keyboard I was using previously (excellent keyboard however too wide).
Fn key - the "house/home" key
vladak
/ solaris-layered-debugging.md
Last active
July 3, 2023 13:22
debugging a problem in Solaris from the top layer (userland) to the bottom layer (hardware)
This is a story about an operating system problem that occupied me at work in 2015 for couple of days. The goal is to give you an overview of debugging techniques and associated tools. I'd like to use this opportunity (writing this article for my students of the Unix programming class at the Mathematical-physical faculty of the Charles university in Prague in 2021) to provide some historical points, some background and some details about operating system work (I feel old writing this). As a bit of a spoiler, the cause of the problem turned out to be completely different than what it seemed initially and involved traversing multiple layers in the operating system. I love this kind of problems because it is fun and great learning experience. I vaguely remember a job advertisement in Netfix bunch of years back that demanded that the applicants posses intimate knowledge of the operating system internals down to (