coldfix

Zsh — print command examples ( with help document )

print is zsh law layer command.

For example it probably build zle command behaviour.

If you master it you will get so beautifule zsh style.

Examples

coldfix

Recovering deleted files in Ubuntu with ext4 filesystem

Recently, I deleted some files by mistake in a Ubuntu machine with an ext4 fs. These notes document the steps I took to get them back.

Important

• this procedure assumes that the partition that contained the deleted files is different from the root partition, as that was the scenario with which I had to deal (deleted files were in my home dir). The procedure needs that the partition that contained the files is unmounted, so if the deleted files were in the root partition, the process would be a bit different (e.g. storing the fs journal in a USB stick, using a live CD/USB to boot and issue the commands, etc.)
• if something is not clear, you need more information, etc. check the sources below

With that out the way, let's begin.

coldfix

#! /usr/bin/env bash

# Substitutes shell-like templates in input files.
#
# Usage:
#   template.sh [-x COMMAND] [-f FILE] [VAR=value]...
#
# Options:
#     -f FILE       Read template from this file [default: -]
#     -x COMMAND    Send output to this command [default: cat]

coldfix

#!/bin/ash
#ash shell for openwrt, it also works with bash

#curl -s 192.168.44.1/logout
rURL=`curl -s -I "http://192.168.44.1" | grep "Location:" | cut -d : -f 2- | cut -c 2-`
if echo $rURL | grep -q "res=notyet"; then
        echo "notyet"
        challenge=`echo $rURL | cut -d '&' -f 4 | cut -d= -f2`
        echo "challenge=$challenge"

coldfix

#!/usr/bin/env python

import sys
import re
from subprocess import check_output, PIPE

import pyflakes.api


def git_file_content(fname):

coldfix

#! /bin/zsh
prefix=$HOME/.texdoc
pkg=$1
doc=$(hrefbytext http://ctan.org/pkg/$pkg 'Pack­age doc­u­men­ta­tion') &&
mkdir -p $prefix
cache=$prefix/$(basename $doc) && (
if [[ ! -e $cache ]]; then
    wget $doc -O $cache
fi
) &&

coldfix

import numpy as np
from timeit import timeit


def timing(neg_ratio=0.5):
    a0 = np.random.uniform(0, 1, 20000000) - neg_ratio
    globals = {
        'a0': a0,
        'np': np,
    }

coldfix

Windows Registry Editor Version 5.00


[HKEY_CLASSES_ROOT\Directory\Background\shell\mingw32]
@="MinGW &32 Bash Here"
"Icon"="\"C:\\msys64\\mingw32.exe\""

[HKEY_CLASSES_ROOT\Directory\Background\shell\mingw64]
@="MinGW &64 Bash Here"
"Icon"="\"C:\\msys64\\mingw64.exe\""

coldfix

#! /usr/bin/zsh

if [[ $# = 0 ]]; then
    echo "Usage: $0 PID [INTERVAL]"
    exit
fi


pid=$1
pgid=$(ps -o pgid= $pid)