X11 server cheat sheet

Number of supported clients / servers

/etc/X11/xorg.conf.d/99-maxclients.conf

Section "ServerFlags"
    Option "MaxClients" "512"
EndSection

henri / neverend.bash

Last active January 6, 2026 03:53

long running process bash monitoring process PID and time

	#!/usr/bin/env bash

	#
	# Create a long running process which may be used for experimentation
	#

	#
	# check how long a process is running in seconds
	# ps -p <PID> -o etimes=
	#

henri / linux_ssd_maintantace_cheat_sheet.txt

Last active June 23, 2026 21:25

ssd maintance / types of flash memory storage

	#
	# SSD's and flash memory is available in a variety of different flavours.
	# As power drains from souch a system you stand to lose those bits!
	#
	# Firmware plays an important role in all of this.
	#
	# If your SSD is not powered up then the firmware will not be able
	# help you out. Most firmware is propriortary and as such, you can
	# power the drive up for a while (...?...) and hope for the best.
	#

henri / linux_networking_cheatsheet.txt

Last active July 27, 2026 22:38

linux networking cheatsheet

	# display - ephemeral port range
	cat /proc/sys/net/ipv4/ip_local_port_range

	# show ports in use (all ports, numeric, processe name)
	ss -anp

henri / open_files_linux_cheat_sheet.txt

Last active November 18, 2025 20:48

open file linux cheat sheet

	# show the limits in place on the system
	ulimit -a

	# system wide ulmits
	ulimit -Sn # soft limit
	ulimit -Hn # hard limit

	# list open files for all processes and sort them by how many files are open
	for pid in /proc/[0-9]*; do echo "PID = $(basename $pid) : $(ls $pid/fd 2>/dev/null \| wc -l) open files"; done \| sort -n -k5,5

henri / linux_quick_look_systems_cheat_sheet.txt

Created November 17, 2025 20:04

linux quick look systems

	preview / quicklook systems

	# nemo
	sudo apt install nemo-preview ffmpegthumbnailer tumbler

	# nutilus
	sudo apt install gnome-sushi

henri / dict_setup_cheat_sheet.txt

Last active November 17, 2025 19:58

dictonary setup cheatsheet linux

	# install on debian dirivitve (commdn line program)
	sudo apt install dict dictd dict-gcide dict-wn

	# look up english word
	dict "word"

	# lookup word just int he collabrative internation dictonary of Ensligh
	dict -d gcide "hello"

henri / txt-2-speech-english-local.bash

Last active December 8, 2025 04:16

elevenlabs.io and localai.io API scripts

	#!/bin/bash
	#
	# (C)Copyright 2025
	# Henri Shustak
	# Released Under the MIT licence
	#
	# Script which takes text via standard in and generates an audio file and then plays that audio file.
	# Text to speach is processed via LocalAI API. You will require a API Key to get a valid response
	# You will also need to setup LocalAI and specify your the host and port number (within the URL varable).
	# Learn more about LocalAI : https://localai.io/

henri / parecord_cheatsheet.txt

Created October 24, 2025 01:06

parecord cheatsheet (record and play audio)

	# list audio soruces # look for .minitor
	pactl list short sources

	# record in flac
	parecord --channels=2 --file-format=flac --device=your.monitor output.flac

	# play back flac
	parecord -play output.flac

	# play back with play

henri / ssh_tunnel_cheatsheet.txt

Last active October 23, 2025 09:31

ssh tunnel cheatsheet

	#
	# ssh using the -N falg for establishing a tunnel is great.... but somtimes it is difficult to know if authentication has
	# been successful (especially if you have any kind of extended login delays setup on a remote system) and you are
	# authenticating with a password (did I type that correctly).
	#
	# this approach requires little additional setup and prevents lots of verbosity regarding the login.
	#

	# recive notification that authentication succeeded - bash
	ssh -v <user>@<remote-host> -p <port> -L <localport>:<tunnel-host>:<remoteport> -N 2> >(grep Authenticated >&2)