ethagnawl

The i3-wm does not come with a keybinding to lock the screen or a preconfigured auto lockscreen. This gist describes how to setup both using i3lock and xautolock. i3lock is a minimalistic lockscreen and xautolock monitors mouse and keyboard activities to automatically lock the screen after a certain time of beiing inactive.

First get the tools if neccessary. E.g. sudo apt install i3lock xautolock.

To setup the keybinding Ctrl+Alt+l (last one is a lowercase L) to lock the screen append the following lines to the i3 configuration file located at ~/.config/i3/config.

# keybinding to lock screen

ethagnawl

In this article, I will share some of my experience on installing NVIDIA driver and CUDA on Linux OS. Here I mainly use Ubuntu as example. Comments for CentOS/Fedora are also provided as much as I can.

Table of Contents

• Install NVIDIA Graphics Driver via apt-get
• Install NVIDIA Graphics Driver via runfile
  • Remove Previous Installations (Important)
  • Download the Driver
  • Install Dependencies
  • Creat Blacklist for Nouveau Driver

• Stop lightdm/gdm/kdm

ethagnawl

# tmux config file

# the rest of your config file ...

# This example creates a variable named `custom_pane_title` which will be 
# displayed if and only if it has been set -- in this case by by your 
# tmuxinator pane commands.
# This feature doesn't seem to be documented, otherwise I'd provide a link. 
# I _believe_ this feature requires tmux >= 3.0
set -g pane-border-format "#{pane_index}#{?@custom_pane_title,:#{@custom_pane_title},}:#{pane_title}"

ethagnawl

sudo arp-scan --localnet 2> /dev/null | grep Pi | awk '{print $1}'

ethagnawl

# https://www.postgresqltutorial.com/postgresql-indexes/postgresql-list-indexes/
SELECT
    tablename,
    indexname,
    indexdef
FROM
    pg_indexes
WHERE
    schemaname = 'public'
ORDER BY

ethagnawl

select pid as process_id, 
       usename as username, 
       datname as database_name, 
       client_addr as client_address, 
       application_name,
       backend_start,
       state,
       state_change
from pg_stat_activity;

ethagnawl

import code; code.interact(local=dict(globals(), **locals()))

ethagnawl

[Unit]
Description=Reverse SSH Tunnel
After=network.target

[Service]
ExecStart=/usr/bin/ssh -N -R 27276:localhost:22 -o "ExitOnForwardFailure yes" server
KillMode=process
Restart=always

[Install]

ethagnawl

du -s * | sort -k 1,1 -V

ethagnawl

set-hook after-split-window 'run "echo split > ~/tmux.log'
set-hook before-new-window 'run "date >> ~/tmux.log"'