zldrobit

Apt proxy

Add

Acquire::http::proxy "socks5h://server:port"; 
Acquire::https::proxy "socks5h://server:port"; 

to a apt.conf.d file (like /etc/apt/apt.conf.d/12proxy)

see https://askubuntu.com/questions/35223/syntax-for-socks-proxy-in-apt-conf/1117259#1117259

zldrobit

System Performance

Sampling performance as top

perf top --sort comm,dso

Record performance

perf record --call-graph dwarf

Parse performance record

perf report --call-graph --sort comm,dso

See also

https://dev.to/franckpachot/linux-perf-top-basics-understand-the-316l

zldrobit

How to disable systemd-resolved in Ubuntu

Stages

• Disable and stop the systemd-resolved service:

    sudo systemctl disable --now systemd-resolved.service		
  

• Then put the following line in the [main] section of your /etc/NetworkManager/NetworkManager.conf:

zldrobit

install nvidia driver

sudo apt-get update
sudo apt-get install nvidia-384
sudo reboot

set gpu cards to persistent mode

sudo nvidia-persistenced --persistence-mode

zldrobit

On Ubuntu Server

• Install urxvt sudo apt install rxvt-unicode
• Install ranger pip install ranger-fm (ranger is installed at ~/.local/bin/ranger)
• Edit ranger config file (~/.config/ranger/rc.conf)

set preview_images true
set preview_images_method urxvt

On Client

zldrobit

Prerequisite

apt install git build-essential cmake python3-numpy [python-numpy]

Install FFmpeg (for OpenCV compilation)

apt-get install libavcodec-dev libavformat-dev libavutil-dev libswscale-dev libavresample-dev

zldrobit

in Dream Studio (Stability AI)

teenage boys and girls playing on grass, with warm sun and breeze. by Vincent van Gogh HQ

zldrobit

Vim

Description	Command
Delete a word in terminal mode	C-W .
Paste in terminal mode	C-W ""
Terminal normal mode	C-W N
Last inserted register	.
Go to the last edited location	`.
Go to the previous edited location	g;
Go to the next edited location	g,

zldrobit

#!/usr/bin/perl
# Author: Todd Larason <jtl@molehill.org>
# $XFree86: xc/programs/xterm/vttests/256colors2.pl,v 1.2 2002/03/26 01:46:43 dickey Exp $

# use the resources for colors 0-15 - usually more-or-less a
# reproduction of the standard ANSI colors, but possibly more
# pleasing shades

# colors 16-231 are a 6x6x6 color cube
for ($red = 0; $red < 6; $red++) {

zldrobit

Moved to git-repository: https://github.com/denji/awesome-http-benchmark

Tools

Located in alphabetical order (not prefer)

• ab – slow and single threaded, written in C
• apib – most of the features of ApacheBench (ab), also designed as a more modern replacement, written in C
• autocannon – fast HTTP/1.1 benchmarking tool written in Node.js
• baloo – Expressive end-to-end HTTP API testing made easy, written in Go (golang)