Yousuf Ali Yousuf28

⏱️ Running Scheduled Tasks Without Cron: A Simple Bash-Based Scheduler

A complete guide with examples, time customization, and process management

Sometimes you need to automate a task on a Linux server — but crontab isn’t available. This is common on restricted systems, containers, or environments where cron is not installed or disabled.

With a simple Bash loop, you can create your own lightweight scheduler that behaves similarly to cron.

This guide covers:

Emacs 29 + Doom setup for MacOS

Installation (from Doom guide)

https://github.com/doomemacs/doomemacs/blob/master/docs/getting_started.org#with-homebrew

I use emacs-plus because of the emacs-mac issues with emacsclient. See this issue: railwaycat/homebrew-emacsmacport#52

Build emacs

A one-liner to install all dependencies is:

$ sudo apt update
$ sudo apt install build-essential libgtk-3-dev libgnutls28-dev \
  libtiff5-dev libgif-dev libjpeg-dev libpng-dev libxpm-dev \
 libncurses-dev texinfo \

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	####
	# Specify the OS you want to run the Docker container in
	# For the latest version of Ubuntu, use:
	# FROM ubuntu:latest
	# Learn more about this Ubuntu image, and versions (tags):
	# https://hub.docker.com/_/ubuntu
	####
	FROM ubuntu:22.04

	#####

	# from terminal to clipboard
	echo "hello world" > /dev/clipboard
	pass show personal/loom \|head -n 1 > /dev/clipboard

	# from clipboard to terminal

	cat /dev/clipboard > save.txt

	### MATPLOTLIBRC FORMAT

	# This is a sample matplotlib configuration file - you can find a copy
	# of it on your system in
	# site-packages/matplotlib/mpl-data/matplotlibrc. If you edit it
	# there, please note that it will be overwritten in your next install.
	# If you want to keep a permanent local copy that will not be
	# overwritten, place it in the following location:
	# unix/linux:
	# $HOME/.config/matplotlib/matplotlibrc or

	# List all functions and packages used by R scripts in a project.

	library(NCmisc)
	# IMPORTANT: Also load any libraries used by the project

	# Make list of all functions by package
	funcs <-
	list.files(here::here(), pattern ="\\.R$", recursive = TRUE, full.names = TRUE) %>%
	map(list.functions.in.file) %>%
	flatten

	# change prefix to Ctrl-a (like in gnu-screen)

	unbind C-b
	set-option -g prefix C-a
	bind-key C-a send-prefix


	# shell
	set -g default-command /bin/zsh
	set -g default-shell /bin/zsh

	#Change ls colours
	LS_COLORS="ow=01;36;40" && export LS_COLORS

	#make cd use the ls colours
	zstyle ':completion:*' list-colors "${(@s.:.)LS_COLORS}"
	autoload -Uz compinit
	compinit