vbarbarosh’s gists

vbarbarosh / shell_bash_spawn_wait

Last active April 10, 2019 17:33

shell_bash_spawn_wait – Create 100 parallel jobs and wait until they are done https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# https://www.percona.com/blog/2017/10/01/one-million-tables-mysql-8-0/

	function long_run
	{

vbarbarosh / shell_escape_html

Last active April 11, 2019 18:18

shell_escape_html – Make a string safe to put into html https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Make a string safe to put into html

	# https://stackoverflow.com/a/12873723/1478566
	sed 's/&/\&/g; s/</\</g; s/>/\>/g; s/"/\"/g; s/'"'"'/\'/g'

vbarbarosh / shell_awk_parse_columns

Last active April 12, 2019 17:17

shell_awk_parse_columns – Parse columns separated by spaces https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Parse columns separated by spaces

	docker ps \| awk '{print $2}'

vbarbarosh / shell_awk_parse_ssh_config

Last active April 13, 2019 16:54

shell_awk_parse_ssh_config – Parse ~/.ssh/config file with awk https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Parse ~/.ssh/config file with awk

	# usage: shell_awk_parse_ssh_config
	# usage: shell_awk_parse_ssh_config \| column -t

vbarbarosh / shell_lines_count

Last active April 14, 2019 14:19

shell_lines_count – Count lines https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Count lines

	find \| wc -l

vbarbarosh / shell_lines_prefix_time

Last active October 3, 2020 22:05

shell_lines_prefix_time – Add a timestamp to beginning of each line https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Add a timestamp to beginning of each line

	# The fastest
	# https://unix.stackexchange.com/a/26797/121657

vbarbarosh / shell_docker_browserless_screencast

Last active April 16, 2019 18:17

shell_docker_browserless_screencast – Make a screencast of a page using Browserless https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Make a screencast of a page usign Browserless

	curl -sf https://chrome.browserless.io/screencast \
	-H Content-Type:application/javascript \

vbarbarosh / shell_docker_browserless_parse_showmyip

Last active April 17, 2019 15:00

shell_docker_browserless_parse_showmyip – Parse a website using css selectors on the example of showmyip.gr https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Parse a website using css selectors on the example of showmyip.gr

	docker run --rm -i browserless/chrome bash << 'EOF'
	node build/index.js &

vbarbarosh / shell_docker_browserless_markdownpdf

Last active April 18, 2019 18:17

shell_docker_browserless_markdownpdf – Convert markdown into pdf using Browserless https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Convert markdown into pdf using Browserless
	# usage: cat input.md \| ./shell_docker_browserless_markdownpdf > a.pdf

	html=`base64 -w0 << EOF

vbarbarosh / shell_docker_browserless_debug

Last active April 19, 2019 17:01

shell_docker_browserless_debug – Debugging Browserless https://codescreens.com

	#!/bin/bash

	# http://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin
	# http://redsymbol.net/articles/unofficial-bash-strict-mode/
	set -o nounset -o errexit -o pipefail

	# Debugging Browserless

	# -e DEBUG=browserless* print only browserless messages
	# -e DEBUG=puppeteer* print only puppeteer messages

Vladimir Barbarosh vbarbarosh