Articles found under tag: tutorial

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Tips on getting (and suggesting, and editing) user input

Posted in Tutorials

By Bob Mesibov

In a previous Linux Rain article I explained how to use the YAD dialog to do multiple-item data entry in a GUI. Here I show one way to allow users to check and edit what they've entered in YAD. I also explain how to offer default, editable inputs in terminal-based data entry, and how to color the…

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How to get nowhere in particular

Posted in Tutorials

By Bob Mesibov

In this tutorial I explain one way to generate a random geographical location, using simple command-line tricks. Latitude and longitude: decimal degrees Latitude runs from 0 to 90 degrees from the Equator to the North Pole, and 0 to 90 degrees from the Equator to the South Pole. Longitude in…

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Top 10! Fun On The Command Line

Posted in Tutorials

By Bob Mesibov

If you just love making 'top 10'-type lists but are a little embarrassed to say so, tell people you're passionate about data exploration. To impress them even more, explain that you do your data exploration on the command line. But don't ruin the impression by telling them how easy that is! In this…

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ODT to TXT, but keep the line numbering

Posted in Tutorials

By Bob Mesibov

The title explains what this article is about. If you save an .odt file as text, or copy/paste the contents as a text file, or run odt2txt or the unoconv utility, you lose the apparent line structure of the original, and with it the line numbering. But there is a way... Losing apparent line…

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Scripting a 4-Color Multiple Grepper

Posted in Tutorials

By Bob Mesibov

I wrote the shell script described here ('grep4') to find up to four items at the same time in my data tables, which are big text files with one record per line. The script gives each searched-for item its own color on the terminal screen. It lets me know in advance how many 'hits' there are, so…

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Tips on Tables

Posted in Tutorials

By Bob Mesibov

Big data or small data, a lot of it comes these days as plain text arranged in rows and columns. Here are a few tips on working with tables of text, both in text editors and on the command line. CSV isn't what it seems. Text tables are often exported from databases and spreadsheets as…

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A Pivot Table In AWK

Posted in Tutorials

By Bob Mesibov

GNU AWK is a great tool for working with tables of data, and by using AWK arrays, you can quickly do column sums (and other calculations) based on unique values in another column (see below). Pivot tables in AWK are a bit trickier. In this article I do a slow walk through the code for a simple…

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Why I (sometimes) love regular expressions

Posted in Tutorials

By Bob Mesibov

Command line wizards are forever encouraging the rest of us to learn regular expressions (regex). We're told regex is elegant, powerful and incredibly useful. The downside is that regex can be seriously fiddly. One fly-spot out of place, and the code fails. For this reason I only use 'non-simple'…

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Scripting a 'Find-and-Replace' for big text files

Posted in Tutorials

By Bob Mesibov

EDIT 26/04/2014 I wrote the original fandr script to do single-word replacements in big files. To do multiple-word find-and-replace, the 'needle' variables have to be double-quoted, as in the revised script below. An example of a multiple-word replacement is at the end of this article. I use two…

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Multiple-item data entry with YAD

Posted in Tutorials

By Bob Mesibov

YAD (Yet Another Dialog) creates GUI dialogs for data entry, user notification, etc. It was written by Victor Ananjevsky and is described as a fork of Zenity. In fact, it greatly extends Zenity and has a very large number of handy options. Here I explain how to build a multiple-item data entry form…

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Linuxtoday.com

Setup FTP server using VsFtp and Configure Secure FTP connections on Ubuntu 14.04 Server

 ubuntugeek: vsftpd is a GPL licensed FTP server for UNIX systems, including Linux.

Why do so many Linux users hate Oracle?

 ITworld: Oracle has always had a rather touch and go relationship with the open source community, to say the least.

What is a good EPUB reader on Linux

 xmodulo: If for some reasons you wish to open an electronic book in your computer, chances are that you will need specific software.

Microsoft Lobby Denies the State of Chile Access to Free Software

 softpedia: Fresh on the heels of the entire Munich and Linux debacle, another story involving Microsoft and free software has popped up across the world, in Chile.

Dangling the Linux Carrot

 FOSSforce: These are different desktops, all individual from one another, and I can do different things on each one of them at different times."

Home automation hub runs Linux, offers cloud services

 LinuxGizmos: Cloud Media launched a Kickstarter campaign for a Linux-based "Stack Box" home automation hub with cloud services and Raspberry Pi expansion compatibility.

How To Enable HTML5 Playback For Netflix On Ubuntu 14.04 Or 14.10

 webupd8: Netflix supports HTML5 playback (using the Encrypted Media Extensions) but unfortunately, it doesn't work out of the box on Linux for now.

Linux Foundation Debuts Linux Certification Effort #linuxcon

The new certifications mark the first time the Linux Foundation has offered formal certification after years of success with training programs.

Thanks For Making Games Faster: Top 10 Quotes from the Linux Kernel Developer Panel #linuxcon

Linux.com: Linux gamers owe a debt of gratitude to kernel developer Andy Lutomirski for his recent work getting 32-bit programs to run faster on a 64-bit kernel

GamingOnLinux.com Latest Articles

GOL World Tour: Gaming From Argentina

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The Witcher 3 For Linux Remains Officially Unconfirmed

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How To Build A Budget Steam Machine

For those who can't wait for the release of Valve's Steam Machines, this is a guide on how to build your own using parts tested to make sure they play nice together. The guide also doubles up as a cheap PC build for those looking to get the best value for money Linux gaming rig.

A Very Important Announcement For You

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Cities Skylines, A City Builder Announced From Paradox & It's Coming To Linux

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Spellforce 3 Announced For Linux

Thanks to a couple of German news site we have learnt today that Spellforce 3 will be heading to Linux. Not surprising is that our new friends at Nordic Games are the publisher.

Ziggurat, An FPS Dungeon Crawler Now On Linux And It's Good, But With Issues

Ziggurat is a great looking mix of hectic FPS fighting and dungeon crawling, but it has been released with some major issues.

Monsters & Monocles, A Beautiful & Frantic Top Down Shooter

Monsters & Monocles looks absolutely fantastic and they need help on Steam Greenlight in the way of votes. Luckily it will support Linux from day one.

Check Out 20 Minutes Of Footage From The New Unreal Tournament

The new Unreal Tournament is shaping up nicely, and one youtuber has popped up a video of 20 minutes gameplay.