djblue

reverse ssh

Setup a reverse ssh tunnel to a remote machine:

ssh -fN -R 2222:localhost:22 user@server

Connect to tunnel after logging on to the remote machine:

ssh user@server
ssh user@localhost -p 2222

djblue

Keybase proof

I hereby claim:

• I am djblue on github.
• I am djblue (https://keybase.io/djblue) on keybase.
• I have a public key whose fingerprint is 7FCB 6D86 C6C5 8A17 F757 3A82 EE96 F634 BE27 9099

To claim this, I am signing this object:

djblue

# Sum all of the columns in a table
cat file.txt | cut -d',' -f2 | paste -sd+ | bc

djblue

self signed ssl certificates

When setting up a development server that will be accessible over the internet, it is a good idea to use ssl.

Below are some snippets for setting up self signed certificates:

sudo openssl req -x509 -nodes -days 365 \
                 -newkey rsa:2048 \
 -keyout /etc/nginx/ssl/nginx.key \

djblue

server {

  server_name: you.domain;
  listen 443 ssl;
  
  ssl_certificate /etc/nginx/ssl/nginx.crt;
  ssl_certificate_key /etc/nginx/ssl/nginx.key;

  location / {
    proxy_set_header Host $host;

djblue

#!/bin/sh

# quickly setup a guest virtualbox on arch linux
# should at least get you shared folders

pacupg # upgrade all current packages

# install guest additions
pacin virtualbox-guest-modules virtualbox-guest-utils