nvm: Setting a default Node.js version

The Node Version Manager allows installing multiple NodeJS versions and switching between them.
By default, it does not automatically switch versions when entering a directory that holds a .nvmrc file.

The project's [readme document](https://g...

tl;dr

asdf allows you to manage multiple runtime versions with a single CLI tool and is backwards compatible by supporting existing config files, like e.g. .nvmrc or .ruby-version.

Getting Started

1. Disable rbenv
   1.1 Dele...

mysql> SELECT @@global.version;
+------------------+
| @@global.version |
+------------------+
| 5.6.30           |
+------------------+
1 row in set (0,00 sec)

[MySQL 5.6 Reference Manual](https://dev.mysql.com/doc/refman/5.6/en/sql-mode...

When your system is not running on English, you may sometimes want to run some applications and not use your system locale.
Use cases are scripts that parse output, or just using the (possibly) more common English labels or error messages. Here is...

If you are on a Linux shell and want to open a file with whatever default application is configured for that type, this often works:

xdg-open Quote.odt
xdg-open invoice.pdf
xdg-open index.html

Pro Tip

Make an alias so you ...

Sometimes I ran across a GitHub merge request of a gem where it was not completely obvious in which version the change was released. This might be the case for a bugfix PR that you want to add to your project.

Git can help you to find the next gi...

When a gem author releases a new version to Rubygems, usually a tag with the version number (e.g. v1.2.0) is created an pushed to Github, so everyone can check out or take a look at the source code at this point version release at a later time.
...

If your project depends on an old version of ImageMagick that you can no longer install in your system, you can choose the run an old ImageMagick in a Docker container.

Dockerized ImageMagick commands will only work with absolute path arguments. ...

xterm by default uses black text on white background.

To change that to something like "light gray on black", do a

vim ~/.Xresources

...and put this in there:

xterm*background: black
xterm*foreground: lightgray

Afterwards, feed ...

To install webmock 1.5.0:

sudo gem install webmock --version "=1.5.0"

or
sudo gem install webmock -v "=1.5.0"