Showing User’s application in Show all applications

On ubuntu, when you press Super key twice or press Super+A, you see applications installed on host. But, not all applications are installed via dpkg or snap. for example, Postman and Bitwarden doesn’t provide installers instead they provides something like App Image.

I place such programs in ~/Applications. and I want to run this kind of program conviniently using Super key like Spotlight search in Mac.

Register mDNS records to AWS Route53

In local network, I can use mDNS names like DESKTOP-RHM4944.local, but I cannot use mDNS name over OpenVPN. I uses openvpn to access office network, and I want to be able to find out client IP of certain PC. and the PC uses DHCP to obtain dynamic IP.

I have AWS environment, so I can use Route32 to resolve local hostname.

The network

• AWS VPC
• EC2 with OpenVPN Server
• RaspberryPi on Office network (connected to OpenVPN Server)
• Client Laptop (as Remote Worker)

AWS Route53 Private Zone

• Create Route53 Private Zone to be used as .local alternative. I will connect DESKTOP-RHM4944.office instead of DESKTOP-RHM4944.local

Setup Site-to-site VPN using AWS EC2 OpenVPN server and OpenVPN Client on RPi

(I will not describe here, I have done it before)

GnuPG 사용하기

Create a new key

gpg --full-generate-key

export

내보내기

Wifi QR Code

• Code Format
  text

  WIFI:S:<SSID>;T:<WEP|WPA|blank>;P:<PASSWORD>;H:<true|false|blank>;;

• example
  text

  WIFI:S:DGKIM5G;T:WPA2;P:secretWiFi@@;;

Reference

• https://en.wikipedia.org/wiki/QR_code

Script

• docker_aws_vpc.sh
  bash

  #!/bin/bash
  
  # to prevent docker to pickup 172.31.0.0/16
  docker network \
  create \
  --subnet 172.31.253.0/30 \
  aws_vpc

Description

While you are developing, it is convenient if you are using VPN to access AWS VPC.

What if my tweets can be heard

Install rainbowstream

rainbowstream is a twitter client for linux cli.

• prepare python venv

python3 -m venv venv
source venv/bin/activate

• install rainbowstream

pip install rainbowstream

• run rainbowstream

rainbowstream
# you will be asked to login to twitter

Install espeak

espeak is TTS software for linux