esavier

Useful LXD commands

Summarized from https://stgraber.org/2016/03/19/lxd-2-0-your-first-lxd-container-312/.

Interestingly, the LXD command line client is named.... lxc!

List available containers

lxc image list ubuntu:        # ubuntu: is officially supported image source
lxc image list images:        # images: is an unsupported source
lxc image alias list images:  # lists user-friendly names

esavier

First, install the necesssary packages:

% apt-get install libpam-oath oathtool

Generate a key and write it to /etc/users.oath (NB the key will be in hexadecimal; if you are using Authy you will want to convert it to BASE32):

% KEY=$( head -c 1024 /dev/urandom | openssl sha1 | awk '{ print $2 }' )
% echo "HOTP/T30/6 andrewlkho - ${KEY}" >> /etc/security/users.oath
% chmod 600 /etc/users.oath

esavier

#ifdef DEBUG
    #define _DEBUG(fmt, args...) printf("%s:%s:%d: "fmt, __FILE__, __FUNCTION__, __LINE__, args)                                                                          
#else
    #define _DEBUG(fmt, args...)
#endif

esavier

Screen Quick Reference

Basic

Description	Command
Start a new session with session name	screen -S <session_name>
List running sessions / screens	screen -ls
Attach to a running session	screen -x
Attach to a running session with name	screen -r <session_name>

esavier

// This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/1st.assignment/shell_bind_tcp.c

#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <unistd.h>

int main()
{

esavier

# Building static nginx for teh lulz
#
# basic dependencies

sudo apt-get install libxslt1-dev libxml2-dev zlib1g-dev libpcre3-dev libbz2-dev libssl-dev

# download nginx and openssl

wget http://nginx.org/download/nginx-1.5.6.tar.gz
tar xf nginx-1.5.6.tar.gz; cd nginx-1.5.6