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@nrocco
nrocco / README.md
Last active December 15, 2023 00:41
Alpine Playground with libvirt

First download alpine-make-vm-image from https://github.com/alpinelinux/alpine-make-vm-image

wget https://raw.githubusercontent.com/alpinelinux/alpine-make-vm-image/v0.4.0/alpine-make-vm-image \
    && echo '5fb3270e0d665e51b908e1755b40e9c9156917c0  alpine-make-vm-image' | sha1sum -c \
    || exit 1
mv alpine-make-vm-image /usr/local/bin/
chmod +x /usr/local/bin/alpine-make-vm-image

Create a new alpine qcow2 image

@rufo
rufo / .vimrc
Created June 2, 2017 20:07
Change vim settings settings based on power status
" requires vim 8 for timer support
function! UpdatePowerSaving(timerId)
if executable('pmset')
call system("pmset -g batt | head -1 | grep 'Battery'")
if !v:shell_error
" on battery
let g:ale_lint_delay=10000
else
" power adapter
@ipbastola
ipbastola / clean-up-boot-partition-ubuntu.md
Last active June 5, 2024 21:05
Safest way to clean up boot partition - Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64

Safest way to clean up boot partition - Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64

Reference

Case I: if /boot is not 100% full and apt is working

1. Check the current kernel version

$ uname -r 
@askn
askn / query_planner.markdown
Created May 4, 2016 14:22 — forked from hgmnz/query_planner.markdown
PostgreSQL query plan and SQL performance notes

Types of index scans

Indexes

Sequential Scan:

  • Read every row in the table
  • No reading of index. Reading from indexes is also expensive.
@bcardiff
bcardiff / mtry.cr
Created February 18, 2016 14:58
mtry macro for crystal
# sample of a macro that flood the method calls with `#try`
# as a POC it does not support methods with arguments
macro mtry(expr)
{% if expr.is_a?(Call) %}
mtry({{expr.receiver}}).try(&.{{expr.name}})
{% else %}
{{expr}}
{% end %}
end
@irvingpop
irvingpop / sane_defaults.rb
Created October 31, 2015 17:59
Vagrant: Irving's sane defaults for Virtualbox with better performance
# replaces this file /opt/vagrant/embedded/gems/gems/vagrant-1.7.4/plugins/providers/virtualbox/action/sane_defaults.rb
# NOTE: if using a different Vagrant version, adjust the version field accordingly
# NOTE2: only the sections with the IRVING comment have been changed from the default
require "log4r"
module VagrantPlugins
module ProviderVirtualBox
module Action
class SaneDefaults
@scottjacobsen
scottjacobsen / git+clone+ssh+agent+forward+sudo
Created December 14, 2012 00:07
Git clone using ssh agent forwarding and sudo
SSH agent forwarding is great. It allows you to ssh from one server to
another all the while using the ssh-agent running on your local
workstation. The benefit is you don't need to generate ssh key pairs
on the servers you are connecting to in order to hop around.
When you ssh to a remote machine the remote machine talks to your
local ssh-agent through the socket referenced by the SSH_AUTH_SOCK
environment variable.
So you the remote server you can do something like:
@Mithrandir0x
Mithrandir0x / gist:3639232
Created September 5, 2012 16:15
Difference between Service, Factory and Provider in AngularJS
// Source: https://groups.google.com/forum/#!topic/angular/hVrkvaHGOfc
// jsFiddle: http://jsfiddle.net/pkozlowski_opensource/PxdSP/14/
// author: Pawel Kozlowski
var myApp = angular.module('myApp', []);
//service style, probably the simplest one
myApp.service('helloWorldFromService', function() {
this.sayHello = function() {
return "Hello, World!"
@schacon
schacon / gist:942899
Created April 26, 2011 19:19
delete all remote branches that have already been merged into master
$ git branch -r --merged |
grep origin |
grep -v '>' |
grep -v master |
xargs -L1 |
awk '{split($0,a,"/"); print a[2]}' |
xargs git push origin --delete