hfs’s gists

hfs / merge2pdf.sh

Created May 12, 2014 20:39

Merge several JPEGs into one PDF using ImageMagick

	#!/bin/sh
	convert input1.jpg input2.jpg input3.jpg output.pdf

hfs / compress-pdf.sh

Created July 7, 2014 09:32

Compress a PDF file of scanned JPEGs using ImageMagick. Source: http://superuser.com/questions/427851/batch-resize-and-compress-pdf-files

convert -density 200 -compress jpeg -quality 20 input.pdf output.pdf

hfs / dbus_nm_ssid.py

Created July 26, 2014 20:28

Query NetworkManager via DBUS in Python: Get the SSID of the active wireless connection

	#!/usr/bin/env python

	import dbus

	NM = 'org.freedesktop.NetworkManager'
	NMCA = NM + '.Connection.Active'
	NMDW = NM + '.Device.Wireless'
	NMAP = NM + '.AccessPoint'
	DBUS_PROPS = 'org.freedesktop.DBus.Properties'

hfs / exception.oql

Created November 21, 2014 15:49

Java VisualVM query in OQL to find all the different exception messages of one exception class

unique(map(heap.objects("org.apache.avalon.framework.configuration.ConfigurationException"), "it.detailMessage.toString()"))

hfs / backup.sh

Created January 18, 2015 14:05

Run full backup with Dirvish, mount and unmount the external backup drive, and send status output to the desktop environment as notifications

	#!/bin/sh

	MOUNTPOINT=/mnt/backup

	notify() {
	returncode=$1
	summary=$2
	message=$3

	if [ $returncode -gt 0 ]; then

hfs / nasaBackground.sh

Last active October 9, 2015 18:51

Awesome window manager: Fetch the NASA Image of the Day and set it as background

	#!/bin/bash -e

	# Grabs the NASA image of the day by RSS feed and updates the gnome
	# background. add this to your cron jobs to have this happen daily. this is,
	# obviously, a hack, that is likely to break at the slightest change of NASA's
	# RSS implementation. yay standards!
	#
	# Source: https://awesome.naquadah.org/wiki/NASA_IOTD_Wallpaper

	FEED='http://www.nasa.gov/rss/lg_image_of_the_day.rss'

hfs / du-files.sh

Created October 6, 2015 07:43

Sum of sizes of files in a directory structure without counting directory sizes

	#!/bin/sh
	find -type f -printf '%s\n' \| awk '{s+=$1} END {print s}'

hfs / run_command_on_all_slaves.groovy

Created November 12, 2015 15:00

Jenkins: Run a shell command on all slaves using the Groovy console. https://stackoverflow.com/questions/26583979/run-a-remote-command-on-all-jenkins-slaves-via-masterss-script-console

	import hudson.util.RemotingDiagnostics;

	script = 'def proc = "ls -1 /media".execute(); proc.waitFor(); println proc.in.text';

	for (slave in Jenkins.instance.slaves) {
	println slave.name;
	try {
	println RemotingDiagnostics.executeGroovy(script, slave.getChannel());
	} catch (all) {
	all.printStackTrace();

hfs / bt.sh

Created March 31, 2016 11:00

GDB backtrace to file, http://blog.cryptomilk.org/2010/12/23/gdb-backtrace-to-file/

#!/bin/sh

echo 0 | gdb -batch-silent -ex "run" -ex "set logging overwrite on" -ex "set logging file gdb.bt" -ex "set logging on" -ex "set pagination off" -ex "handle SIG33 pass nostop noprint" -ex "echo backtrace:\n" -ex "backtrace full" -ex "echo \n\nregisters:\n" -ex "info registers" -ex "echo \n\ncurrent instructions:\n" -ex "x/16i \$pc" -ex "echo \n\nthreads backtrace:\n" -ex "thread apply all backtrace" -ex "set logging off" -ex "quit" --args "$@"

hfs / hexdump.sh

Created May 3, 2016 14:11

Poor man’s hexdump using “od” if “xxd“ or “hexdump” is not available

	#!/bin/sh
	od -c -t x1 "$@"