If your US-ANSI keyboard supports VIA Show archive.org snapshot you can use it to create macros for the German Umlauts. All Keychron models should support this by now.

Requirement

Set the compose key of your desktop environment. I use Caps Lock for that.
The momentary layer key like MO(3) is bound to fn

Default behavior

# Type ö
Caps Lock, Shift-', o

# Type Ö
Caps Lock, Shift-', Shift-o

Custom behavior

# Type ö
fn-o

# Type Ö
fn-Shift-o

Macros

# Type ä/Ä
{KC_CAPS}{KC_RSFT,KC_QUOT}a

# Type ö/Ö
{KC_CAPS}{KC_RSFT,KC_QUOT}o

# Type ü/Ü
{KC_CAPS}{KC_RSFT,KC_QUOT}u

# Type ß
{KC_CAPS}ss

# Bonus: Type €
{KC_CAPS}e=

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

Prevents you from data breaches and liability risks
Upgrade at your own pace
Works with modern Rubies

Setup

Create macros
Bind them on the non-umlaut key (Example: A) of the secondary layer

Related cards:

Why Apple Silicon MacBooks Can Only Use One External Display Through A Dock

It's quite confusing how many external displays are usable with a MacBook that uses an M1 or M2 Chip. Documentation on the Internet is sparse and not even the Geniuses at the Genius Bar are 100% sure. We found out some things and can explain the b...

Capistrano 3: assets:precompile only on one server

Disclaimer

This should not be necessary in any case and is only for special cases, for e.g. if the assets directory is linked to a shared storage (for e.g. glusterfs). Please mind that it isn't wise to move your assets directory to a shared s...

Controlling multiple PostgreSQL installations on Debian/Ubuntu

Hint

This applies only to distributions based on Debian.

Requirement

You need to setup the PostgreSQL Apt Repository first.

If you have multiple Postgres versions install...

Use Terraform grouping mode like Golang's Ellipsis expression

The terraform documentation states the ... syntax as (grouping mode*. See: Grouping-Results).

But this seems not the be the whole truth. Instead the ... sy...

dumping and restoring PostgreSQL databases

This card is just about creating simple PostgreSQL dumps. This is no instruction for a backup strategy nor a guide for SQL dump performance optimization.

Read before starting

I will assume that all commands will be executed as local `postgr...

Useful PostgreSQL commands

on the bash (issued as postgres user)

Start/Stop/Restart PostgreSQL

pg_ctl -D $configdir start|stop|restart

Start/Stop/Restart the corresponding PostgreSQL using the given configuration directory. The configuration directory sh...

Desktop notification for failed systemd user services

You can execute systemctl --user --failed to check for failed systemd user units. But let's face it: It's inconvenient and you'll probably miss failures. Better use desktop notifications.

~/.config/systemd/user/service.d/user-failure-notifi...

SSH add/remove port forwarding to active session

It is possible to manipulate the forwarded ports of an established interactive SSH session.
This is done by opening the command line with the escape character ~C. This will open a ssh> prompt. If it doesn't, make sure it's the first character...

HowTo: Curl applications that are usually behind reverse proxies with TLS termination without the application redirecting to https schema

A lot of web applications require being called over https, which is a good thing. It's possible to configure this requirement at the web- or proxy server level, where nginx or apache will just redirect every request on http to https. Som...

Don't use puppet `exec` type without `cwd` and `user` parameter

Don't use exec without user parameter

If you use exec without user parameter, the command will get executed as root. You mostly don't want this.
There is a difference in the env variables of the exec if you run puppet man...

Andreas Vöst

Say thanks

Last edit

About 1 month ago

Andreas Vöst

License

Source code in this card is licensed under the MIT License.