tuxfight3r

Resize a Hard Disk for a Virtual Machine

Our Virtual Machines are provisioned using Vagrant from a Linux base box to run using VirutalBox. If the Hard Disk space runs out and you cannot remove files to free-up space, you can resize the Hard Disk using some VirtualBox and Linux commands.

Some assumptions

The following steps assume you've got a set-up like mine, where:

tuxfight3r

# Start the old vagrant
$ vagrant init centos/7
$ vagrant up


$ vagrant ssh
vagrantup:~$ sudo yum -y install wget kernel-devel kernel-headers gcc
vagrantup:~$ sudo yum -y update & reboot
vagrantup:~$ sudo wget -c http://download.virtualbox.org/virtualbox/5.2.12/VBoxGuestAdditions_5.2.12.iso \
                       -O VBoxGuestAdditions_5.2.12.iso

tuxfight3r

One-liners

Reverse every line:

Input file:

$ cat foo
qwe
123

bar

tuxfight3r

Useful One-Line Scripts for Perl                    Dec 03 2013 | version 1.10
--------------------------------                    -----------   ------------

Compiled by Peteris Krumins (peter@catonmat.net, @pkrumins on Twitter)
http://www.catonmat.net -- good coders code, great reuse

Latest version of this file is always at:

    http://www.catonmat.net/download/perl1line.txt

tuxfight3r

#!/usr/bin/env python
# coding=utf8
# Took from https://gist.github.com/542780 and fixed regex.
#
# Copyright (C) 2010 Saúl ibarra Corretgé <saghul@gmail.com>
#

"""
pydmesg: dmesg with human-readable timestamps
"""

tuxfight3r

realm=Sonatype Nexus Repository Manager
host=nexus.company.com
user=admin
password=admin123

tuxfight3r

• Binary Builds

oc new-build --binary=true --name=ola2 --image-stream=redhat-openjdk18-openshift
oc start-build ola2 --from-file=./target/ola.jar --follow
oc new-app 

• Turn off/on DC triggers to do a batch of changes without spam many deployments

tuxfight3r

UPDATE: A better way! (August 2015)

As pointed out by @johntyree in the comments, using git reflog is easier and more reliable. Thanks for the suggestion!

 $ git reflog
1ed7510 HEAD@{1}: checkout: moving from develop to 1ed7510
3970d09 HEAD@{2}: checkout: moving from b-fix-build to develop
1ed7510 HEAD@{3}: commit: got everything working the way I want
70b3696 HEAD@{4}: commit: upgrade rails, do some refactoring

tuxfight3r

subnet 192.168.0.0 netmask 255.255.255.0 {
	range 192.168.0.100 192.168.0.200;
	option broadcast-address 192.168.0.255;
	option routers 192.168.0.1;
	on commit {
		set ClientIP = binary-to-ascii(10, 8, ".", leased-address);
		set ClientMac = binary-to-ascii(16, 8, ":", substring(hardware, 1, 6));
		log(concat("Commit: IP: ", ClientIP, " Mac: ", ClientMac, "Hostname: ", host-decl-name));
		execute("/usr/local/bin/dhcp-event", "commit", ClientIP, ClientMac, host-decl-name);
	}

tuxfight3r

from bs4 import BeautifulSoup
import requests as r
from json import dumps

class Country:
    def __init__(self, country, place, gold, silver, bronze, total_medals):
        self.country = country
        self.place = place
        self.gold = gold
        self.silver = silver