Ich hab mir in der Adventszeit mit meinen Kollegen Gedanken darüber gemacht, wie wir Linux-Befehle für unsere Schülerinnen und Schüler besser zugänglich machen. Die Lebenswelt unserer Lernenden fordert an dieser Stelle häufig … Videos. Das ist aber so überhaupt nicht meine Art der Unterrichtsgestaltung. Ich hab zwar schon das ein oder andere Video erstellt, aber das skaliert nicht im Alltag für dutzende Themen.
Dabei fiel mir ein, dass ich schon vor drei Jahren mit asciinema experimentiert hatte. Allerdings ist das damals für mich eingeschlafen. Nun nahm ich gestern einen neuen Anlauf und hab drei Bash-Sessions aufgenommen. Das ist relativ einfach. Allerdings vertippte ich mich häufig bei der Eingabe und musste die Befehls-Sequenzen wiederholt aufnehmen. Und mit dem Endergebnis war ich immer noch nicht zufrieden.
Das war etwas frustrierend und ich dachte mir … das kann ich doch mit einem kleinen Bash-Skript lösen. Die Umsetzung und das Ergebnis beschreibe ich im folgenden Beitrag.
/ _` / __|/ __| | | '_ \ / _ \ '_ ` _ \ / _` |
| (_| \__ \ (__| | | | | | __/ | | | | | (_| |
\__,_|___/\___|_|_|_| |_|\___|_| |_| |_|\__,_|
When the Asciidoctor gem is installed successfully, the Asciidoctor command line interface (CLI) named asciidoctor will be available on your PATH.
jq is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text.
Check & print remote certificate
openssl s_client -connect <hostname>:<port> -showcerts
Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as necessary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable but comes with sensible defaults out of the box.
It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an intended CLI API.
Click in three points:
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arbitrary nesting of commands
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automatic help page generation
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supports lazy loading of subcommands at runtime
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. The notes are in Markdown format.
Notes exported from Evernote via .enex files can be imported into Joplin, including the formatted content (which is converted to Markdown), resources (images, attachments, etc.) and complete metadata (geolocation, updated time, created time, etc.). Plain Markdown files can also be imported.
The notes can be synchronised with various cloud services including Nextcloud, Dropbox, OneDrive, WebDAV or the file system (for example with a network directory). When synchronising the notes, notebooks, tags and other metadata are saved to plain text files which can be easily inspected, backed up and moved around.
The application is available for Windows, Linux, macOS, Android and iOS. A Web Clipper, to save web pages and screenshots from your browser, is also available for Firefox and Chrome.
HTTP Prompt is an interactive command-line HTTP client featuring autocomplete and syntax highlighting.
The web is moving to HTTPS, preventing network attackers from observing or injecting page contents. But HTTPS needs TLS certificates, and while deployment is increasingly a solved issue thanks to the ACME protocol and Let's Encrypt, development still mostly ends up happening over HTTP because no one can get an universally valid certificate for localhost.
“fgallery” is a static photo gallery generator with no frills that has a stylish, minimalist look. “fgallery” shows your photos, and nothing else.
There is no server-side processing, only static generation. The resulting gallery can be uploaded anywhere without additional requirements and works with any modern browser.
docopt creates beautiful command-line interfaces
Introduction
One core functionality of Bash is to manage parameters. A parameter is an entity that stores values and is referenced by a name, a number or a special symbol.
parameters referenced by a name are called variables (this also applies to arrays)
parameters referenced by a number are called positional parameters and reflect the arguments given to a shell
parameters referenced by a special symbol are auto-set parameters that have different special meanings and usesParameter expansion is the procedure to get the value from the referenced entity, like expanding a variable to print its value. On expansion time you can do very nasty things with the parameter or its value. These things are described here.
If you saw some parameter expansion syntax somewhere, and need to check what it can be, try the overview section below!
Arrays can be special cases for parameter expansion, every applicable description mentions arrays below. Please also see the article about arrays.
For a more technical view what a parameter is and which types exist, see the dictionary entry for "parameter".
MyCLI is a command line interface for MySQL, MariaDB, and Percona with auto-completion and syntax highlighting.
Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as necessary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable but comes with sensible defaults out of the box.
It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an intended CLI API.
Click in three points:
arbitrary nesting of commands
automatic help page generation
supports lazy loading of subcommands at runtimeYou can use command line arguments to start your Mozilla application with special behavior.
In the fall of 2013, thinking about text utilities got me thinking in turn about how my writing habits depend on the Linux command line. This seems like a good hook for explaining some tools I use every day, so now I’m writing a short, haphazard book.
This isn’t a book about system administration, writing complex software, or becoming a wizard. I am not a wizard, and I don’t subscribe to the idea that wizardry is required to use these tools. In fact, I barely know what I’m doing most of the time. I still get some stuff done.
This is a work in progress. It probably gets some stuff wrong.
taskwarrior is an open-source cross platform command-line task management tool. It allows you to capture, annotate, manipulate and present your tasks, then sync them among devices.