Jean-Pierre van Riel JPvRiel

## gnupg_scdaemon.md

      
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                artizirk
                / gnupg_scdaemon.md
            
            
              Last active
              April 22, 2025 18:10
            
              
                OpenPGP SSH access with Yubikey and GnuPG
              
          
    NB: This document describles a 'Old-School' way of using Yubikey with SSH

Modern OpenSSH has native support for FIDO Authentication. Its much simpler and should also be more stable with less moving parts. OpenSSH also now has support for signing arbitary files witch can be used as replacement of gnupg. Git also supports signing commits/tags with ssh keys.
Pros of FIDO


Simpler stack / less moving parts
Works directly with ssh, ssh-add and ssh-keygen on most computers
Simpler
Private key can never leave the FIDO device

Cons of FIDO


## timejson.sh
alias timejson='/usr/bin/time -f '"'"'{"exit_code" : %x, "time_user_seconds" : %U, "time_system_seconds" : %S, "time_wall_clock_seconds" : %e, "rss_max_kbytes" : %M, "rss_avg_kbytes" : %t, "page_faults_major" : %F, "page_faults_minor" : %R, "io_inputs" : %I, "io_outputs" : %O, "context_switches_voluntary" : %w, "context_switches_involuntary" : %c, "cpu_percentage" : "%P", "signals_received" : %k}'"'"

## pprint_color.py
from pprint import pformat
from typing import Any

from pygments import highlight
from pygments.formatters import Terminal256Formatter
from pygments.lexers import PythonLexer


def pprint_color(obj: Any) -> None:
    """Pretty-print in color."""

## verbos-argpary-example.py
import argparse
import logging

parser = argparse.ArgumentParser()
parser.add_argument('--verbose', '-v', action='count', default=1)
args = parser.parse_args()

args.verbose = 70 - (10*args.verbose) if args.verbose > 0 else 0

logging.basicConfig(level=args.verbose, format='%(asctime)s %(levelname)s: %(message)s',

## delete_git_submodule.md

      
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                myusuf3
                / delete_git_submodule.md
            
            
              Created
              November 3, 2014 17:36
            
              
                How effectively delete a git submodule.
              
          
    To remove a submodule you need to:

Delete the relevant section from the .gitmodules file.
Stage the .gitmodules changes git add .gitmodules
Delete the relevant section from .git/config.
Run git rm --cached path_to_submodule (no trailing slash).
Run rm -rf .git/modules/path_to_submodule (no trailing slash).
Commit git commit -m "Removed submodule "
Delete the now untracked submodule files rm -rf path_to_submodule


## gcd_and_lcm.py
# Greatest common divisor of 1 or more numbers.
from functools import reduce


def gcd(*numbers):
    """
    Return the greatest common divisor of 1 or more integers

    Examples
    --------
	from pprint import pformat
	from typing import Any

	from pygments import highlight
	from pygments.formatters import Terminal256Formatter
	from pygments.lexers import PythonLexer


	def pprint_color(obj: Any) -> None:
	"""Pretty-print in color."""
	import argparse
	import logging

	parser = argparse.ArgumentParser()
	parser.add_argument('--verbose', '-v', action='count', default=1)
	args = parser.parse_args()

	args.verbose = 70 - (10*args.verbose) if args.verbose > 0 else 0

	logging.basicConfig(level=args.verbose, format='%(asctime)s %(levelname)s: %(message)s',
	# Greatest common divisor of 1 or more numbers.
	from functools import reduce


	def gcd(*numbers):
	"""
	Return the greatest common divisor of 1 or more integers

	Examples
	--------