photonxp’s gists

photonxp / lns_multi_cwd.bash

Last active October 24, 2018 07:54

Make links in current working directory. A "ln -s" wrapper.

	#!/bin/bash

	# How can we eat the fish any more once we can read their minds? -- The dolphin lady

	# Purpose:
	# Make multiple links in current working directory. A "ln -s" wrapper.

	# Usage:
	# lns_multi_cwd.bash lnk_target_path_1 lnk_target_path_2 ...
	# lns_multi_cwd.bash /path/dir/*

photonxp / sed_tagkey_in_dir.bash

Last active September 25, 2018 08:04

Tag line editing, tag key editing

	#!/bin/bash

	# Tag line editing
	# Change the line
	# from
	# vocabulary grammar
	# to
	# tag:: vocabulary grammar
	# Change by given tag value such as "vocabulary" or "grammar"
	# Omit the tag line if they already have the key word of "tag"

photonxp / add_tags_by_excluding_existing_tags.sh

Last active September 25, 2018 08:12

Tag line editing. Exclude lines that have existing "tag:".

	#!/bin/sh

	# Purpose:
	# Exclude lines that have existing "tag:"
	# Find lines that contains target string "voc"
	# Insert new tags "tag::" to the matched lines
	# Use non-extended regex to improve compatibility

	# Methods:
	# Use the backslash syntax \1 \2 \1d \2d ..

photonxp / touchbash

Last active October 7, 2018 10:56

touch sh bash files with additional operations such as give file names and chmod them

	#!/bin/sh

	# Once the global warmth reaches a tipping point,
	# the chain-reaction could be irreversible,
	# so are we ready for the ticking bomb?

	# Usage:
	# ./touchsh file_name
	# No touch operation if file already existed.

photonxp / sha1sum_file_vs_sumstr.sh

Last active September 11, 2018 11:53

compare generated-sha1sum of a given file to a sum_string

	#!/bin/bash

	# Usage:
	# sha1sum_file_vs_sumstr.sh /path/to/file sum_str

	sha1sum "$1"

	sha1_result=$(sha1sum "$1")
	sum=${sha1_result%% *}
	echo

photonxp / notify_boot_in_profile.sh

Last active July 8, 2018 11:11

script to check if the boot partition has enough remaining space

	#!/bin/bash
	# call this file in your profile as background job

	set -e

	# Adjust this value if it's too long or too short to wait
	sleep 600

	# You need to change this path for your own directory
	BASE_DIR=/path/to/your_notify_dir

photonxp / purge_kernel_by_rules.sh

Last active January 12, 2019 11:05

Purge redundant Ubuntu kernel files by rules defined in the script, such as the number of kernels to be preserved

	#!/bin/bash

	# What if we could adjust the clock,
	# making a day of a virtual AI world much shorter than ours?
	# What if a virtual AI being could spend its whole long life
	# in a blink of our eyes?

	#############################################################
	# Purpose:
	# Purge redundant Ubuntu kernel files by rules defined in the script

photonxp / cutmp3_usage.txt

Created April 2, 2018 05:32

Usage of cutmp3 on Ubuntu Linux


	# http://manpages.ubuntu.com/manpages/trusty/man1/cutmp3.1.html

	cutmp3 -i source_file.mp3 -a 0:37 -b 1:25

	cutmp3 -i file.mp3 -a 0:37 -b 1:25 -o file_ -q

	# cut from the start
	cutmp3 -i file.mp3 -a 0:00 -b 1:25 -o file_ -q

photonxp / eog_latest_img.sh

Last active October 28, 2018 03:17

Use EOG to show the latest image file under a given directory dynamically

	#!/bin/sh

	# images are continueously updated in a given directory [img_src_dir]
	# use the `ls -t` command to find the latest image file
	# use eog to show the latest image file dynamically
	# In the eog Preferences/Slideshow, uncheck the "Loop sequence" option

	# So EOG and Entangle can be used together

	img_src_dir="/home/to/Capture"

photonxp / replace_image_with_images_in_loop.sh

Last active January 28, 2018 09:02

copy images from a directory to replace a given test image one by one

	#!/bin/sh

	# https://superuser.com/questions/211561/loop-pictures-from-a-folder-and-display-fullscreen-slideshow
	# It's better to adjust gthumb to "Fit to window" in preferences.
	# Image Viewer(eog) could do the same job as gthumb, if in full screen mode.

	# use absolute path instead of relative path in case something went wrong
	test_img_path="/path/to/test.jpeg"
	img_folder_path="/path/to/testdir_with_images"

testname photonxp