Jiab77

Raspberry Pi 2/3B/B+/4B Wireless Bridge using Ubuntu Server 18.04 ARM Image and Netplan

The initial goal of this project is to use the raspberry pi in place of my Wireless Range Extender and then going from 3 wireless networks (2.4ghz, 2.4ghz extended, 5ghz) at home to only one (5ghz). This way I'm reducing the exposition to radio waves for the whole familly at home.

Let's go technical

Ok, enough drama for now, let's go technical. 😁

Setup

travisjeffery

Here's the simplest example showing how to do functional options in Golang.

They're a great way to enable users to set options and ease adding new options later.

package main

import (
	"flag"
	"fmt"

qrkourier

Install server certificates issued by a private CA in oVirt4 Manager and Host

• generate a signing request on the system where oVirt Manager is running (the engine server)

openssl req -new -sha256 -key /etc/pki/ovirt-engine/keys/apache.key.nopass -out /tmp/engine.csr

• Submit the CSR to the issuer and wait. Or, if you are the issuer and you happen to be using FreeIPA/IdM, you may issue the certificate with ipa-admintools. For example,

NathanGiesbrecht

# Simple No-ip.com Dynamic DNS Updater
#
# By Nathan Giesbrecht (http://nathangiesbrecht.com)
#
# 1) Install binary as described in no-ip.com's source file (assuming results in /usr/local/bin)
# 2) Run sudo /usr/local/bin/noip2 -C to generate configuration file
# 3) Copy this file noip2.service to /etc/systemd/system/
# 4) Execute `sudo systemctl daemon-reload`
# 5) Execute `sudo systemctl enable noip2`
# 6) Execute `sudo systemctl start noip2`

TheHippo

OUT := binariy-name
PKG := gitlab.com/group/project
VERSION := $(shell git describe --always --long --dirty)
PKG_LIST := $(shell go list ${PKG}/... | grep -v /vendor/)
GO_FILES := $(shell find . -name '*.go' | grep -v /vendor/)

all: run

server:
	go build -i -v -o ${OUT} -ldflags="-X main.version=${VERSION}" ${PKG}

spalladino

# Backup
docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

# Restore
cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

johanndt

TL;DR

Install Postgres 9.5, and then:

sudo pg_dropcluster 9.5 main --stop
sudo pg_upgradecluster 9.3 main
sudo pg_dropcluster 9.3 main

magnetikonline

BIND - delegate a sub domain for a zone

The scenario:

• DNS zone myzone.com defined in BIND.
• Authoritative name server at 123.16.123.1.
• Subzone sub.myzone.com with an authoritative name server at 123.16.123.10.
• Wishing to forward sub-zone to authoritative name server.

Config

magnetikonline

Install OSX Parallels version 10/11/12/13 tools on Ubuntu server guest

Have tested these instructions successfully under Ubuntu 16.04LTS and 14.04LTS.

• Create Ubuntu server instance under Parallels (obviously).
• Start VM, goto Actions - Install Parallels Tools... to mount the ISO image.
  • Note: if this fails, or updating tools for an existing guest you can do the following:
  • Goto Devices > CD/DVD 1 > Connect Image....
  • Select the following ISO image: /Applications/Parallels Desktop/Contents/Resources/Tools/prl-tools-lin.iso.
  • This will mount the tools CD image.

mattes

if _, err := os.Stat("/path/to/whatever"); os.IsNotExist(err) {
	// path/to/whatever does not exist
}

if _, err := os.Stat("/path/to/whatever"); !os.IsNotExist(err) {
	// path/to/whatever exists
}