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sed

NAME
     sed -- stream editor

SYNOPSIS
     sed [-Ealn] command [file ...]
 sed [-Ealn] [-e command] [-f command_file] [-i extension] [file ...]

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Linux Network information:

Default gateway:

ip route | awk '/^default/ { print $3 }'

IP:

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sha512 hash

Algorithm used:

$1$,  MD5
$2a$, Blowfish
$2y$, Blowfish
$5$,  SHA-256
$6$,  SHA-512

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Route command

route

route

Add route:

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Rsync and SSH

PULL FROM REMOTE HOST (DOWNLOAD):

rsync -ravz -e ssh [email protected]:/opt/ /home/user/directory/

rsync -avz -e "ssh -A -i /home/user/.ssh/id_rsa" [email protected]:/data /home/user/projects/data

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Git prune and delete merged local branches

Prune

git remote prune origin --dry-run

git remote prune origin

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git checkout master
git pull

git checkout -b patch/mypatch
git fetch origin master
git reset --hard origin/master
git cherry-pick -m 1 [commit-hash]
git push origin patch/mypatch

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#!/bin/bash
# Built/tested on:
# NAME="Ubuntu" VERSION="16.04.2 LTS (Xenial Xerus)"
# libgit2/libgit2
# https://github.com/libgit2/libgit2/releases
# libgit2 is a portable, pure C implementation of the Git core methods 
# provided as a re-entrant linkable library with a solid API, allowing 
# you to write native speed custom Git applications in any language with bindings.
libgit2='v0.25.0.tar.gz'
libgit2ver='0.25.0'

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#!/usr/bin/perl
use strict;
use warnings;
use Term::ANSIColor qw(:constants);
use Data::Printer;

$| = 1; # turn off the buffering of STDOUT

my ($choice, $times, $key, $value, @hash);
my @array = 0..9;