System-Tooling on Janik von Rotz

Copy SSH private key to Termux

Thu, 22 Aug 2024 08:40:10 +0200

Termux is a beautiful terminal emulator Android app. As I am working mostly on the command line I wanted to be able to do the same on phone. And most importantly in a case of emergency where I don’t have access to my computer I want to able to access my servers and run some commands. This requires to setup existing SSH private keys in the Termux.

Get public IP with Curl

Wed, 17 Aug 2022 08:39:54 +0200

Getting the public IP of your machine (running in the cloud) is simple. You probably find yourself on the command line and want to check if a DNS entry is resolved correctly. Login into the hoster’s dashboard and checking the public IP there is too much of hassle.

Use Pop!_OS

Mon, 05 Jul 2021 14:40:08 +0200

I just upgraded my operating system Pop!_OS to the latest version and once again I was surprised by how far Linux has come.

Mac OS batch resize images

Thu, 03 Sep 2020 19:22:44 +0200

You can easily batch resize groups of images within Mac OS by using the included Preview app, that is, taking a group of pictures set at one or various resolutions, and collectively resize them all together in a group to a new resolution.

Bash SSH host auto completion

Thu, 21 Feb 2019 10:59:37 +0100

By default the ssh command does not support auto completion for host names. However, it stores all hosts you have accessed in the ~/.ssh/known_hosts file. We can take this data and use it for an auto completion function.

Setup SSH on Windows 10

Fri, 19 Jan 2018 11:55:48 +0000

I have started a new job and as usual had to set up a new computer. Using Windows in a Unix environment seems like a bad choice at first. However, Microsoft has changed strategy and embraced the Unix world with projects such as Windows Subsystem for Linux (WSL) or Windows SQL Server support for Linux. In result you can install bash with WSL and use the native ssh client. But there is also another way. If you install Git for Windows a ssh binary is shipped as well. This binary and other tools such as ssh-keygen are not available from the command line by default. I want show you how to fix this, setup a keypair and start using ssh in a Windows environment.

ScreenToGif an awesome recorder

Tue, 04 Aug 2015 07:03:41 +0000

I found the perfect tool to record desktop actions: Screen-To-Gif recorder. I’m using ScreenToGif almost every day to create short and precise online documations for my customer wiki.

Here’s a gif recorded with ScreenToGif how I’m using ScreenToGif to create a gif of my desktop actions.

Create a hotspot with your windows 8 computer

Fri, 26 Dec 2014 14:33:02 +0000

This short guide will tell you how you can turn your computer into a hotspot to share a internet connection with you wlan devices.

We assumed that you either have your computer connected with the internet by a cable or a mobile data connection, or you have not internet connection at all and just want create a LAN (local computer network).