background preloader


Facebook Twitter

Tutonics - Tutorials on Linux, Ubuntu Tips & Guides. Bash scripting quirks & safety tips - Julia Evans. Yesterday I was talking to some friends about Bash and I realized that, even though I’ve been using Bash for more than 10 years now there are still a few basic quirks about it that are not totally obvious to me.

Bash scripting quirks & safety tips - Julia Evans

So as usual I thought I’d write a blog post. We’ll cover some bash basics (“how do you write a for loop”)quirky things (“always quote your bash variables”)and bash scripting safety tips (“always use set -u”) If you write shell scripts and you don’t read anything else in this post, you should know that there is a shell script linter called shellcheck. Use it to make your shell scripts better!

We ’re going to talk about bash like it’s a programming language, because, well, it is. UNIX / Linux Tutorial for Beginners. A beginners guide to the Unix and Linux operating system.

UNIX / Linux Tutorial for Beginners

Eight simple tutorials which cover the basics of UNIX / Linux commands. Introduction to the UNIX Operating System What is UNIX? Files and processes The Directory Structure Starting an UNIX terminal Tutorial One Listing files and directories Making Directories Changing to a different Directory The directories . and .. Linux Support, College of Liberal Arts & Sciences, The University of Iowa. Next:Online Coursework SubmissionUp:Advanced TopicsPrevious:Command Redirection Classes of Accounts The files and directories in the home directory of your CLAS Linux account can be accessed on computers running the Linux operating system.

Linux Support, College of Liberal Arts & Sciences, The University of Iowa

Linux is a type of UNIX and uses UNIX file and directory permissions. For purposes of permissions, UNIX divides accounts into three classes: Types of Permissions There are three basic types of permissions which can be assigned to each of these three classes of accounts: 25 Linux PS Command Examples,every System Admin Must Know - SimplyLearnTopics - Learners Platform. Linux Learners Guide - Book Written by Ankam Ravi Kumar - Tech Tutorials. Linux Learners Guide – Book Written by Ankam Ravi Kumar This Book Holds below topics.

Linux Learners Guide - Book Written by Ankam Ravi Kumar - Tech Tutorials

We are giving this book is for free, After reading if you like, Then do remember to come back Donate and help Us. Click on BuyNow button to donate $5. Linux Sysadmin Mentoring Group. Bash Scripting Tutorial - Ryans Tutorials. Welcome!

Bash Scripting Tutorial - Ryans Tutorials

Ok, so you want to learn how to write Bash scripts on Unix/Linux. Or, it's part of a subject you're doing and so you're learning because you have to. Either way, that's great. Keep on reading my friend as you are about to harness a powerful tool that will allow you to perform complex repetitive tasks with minimal effort. Introduction. Linux Sysadmin Mentoring Group. How did you get your start? : linuxadmin. Freedom Penguin - Linux Software Reviews, Discussion and Articles. 27 Best Linux Tutorial Books That You Need To Download Now.

Do I need to describe what is Linux?

27 Best Linux Tutorial Books That You Need To Download Now

No, I don’t. Because in the world of Technology, Everyone knows it. But why people do know? Linux is a versatile foundation of all the software and OS. A major portion of software development, Tech education, OS are based on Linux. Day by day people are learning the benefit of open source software, Virus-free OS, and above all to adopt the flexible app base, where every customization is possible as per users need. Monday, Aug. 15, 2016 - The A Big Boy Made Me Daily. Open source is changing the world: join the movement. Linux Forums. MicroHOWTO: Welcome. BaBE - Bash By Examples - LinuxIntro. BaBE - Bash By Examples; Your significant Linux scripting tutorial;; The easiest way to get your feet wet with a programming language is to start with a program that simply outputs a trivial text, the so-called hello-world-example.

BaBE - Bash By Examples - LinuxIntro

Here it is for bash: create a file named hello in your home directory with the following content: #! /bin/bashecho "Hello, world! " open a console, enter cd chmod +x hello. Writing Robust Bash Shell Scripts - David Pashley.comDavid Many people hack together shell scripts quickly to do simple tasks, but these soon take on a life of their own.

Writing Robust Bash Shell Scripts - David Pashley.comDavid

Unfortunately shell scripts are full of subtle effects which result in scripts failing in unusual ways. It’s possible to write scripts which minimise these problems. In this article, I explain several techniques for writing robust bash scripts. How often have you written a script that broke because a variable wasn’t set? I know I have, many times. chroot=$1 ... rm -rf $chroot/usr/share/doc If you ran the script above and accidentally forgot to give a parameter, you would have just deleted all of your system documentation rather than making a smaller chroot. GitHub - Leo-G/DevopsWiki: A wiki of Devops Tools, Tutorials and Scripts. Linux Shell Scripting Tutorial - A Beginner's handbook. Linux Shell Scripting Tutorial - A Beginner's handbook. Untitled.


Distributions. Cheat Sheet : All Cheat Sheets in one page. Containrs. Weave - All you need to connect, observe and control your containers. What You Will Build Weave provides a software network optimized for visualizing and communicating with applications distributed within Docker containers.

Weave - All you need to connect, observe and control your containers

Using tools and protocols that are familiar to you, Weave’s network topology lets you to communicate between containerized apps distributed across multiple networks or hosts more quickly and efficiently. With Weave you focus on developing your application, rather than your infrastructure. As demonstrated in this tutorial, Weave works seamlessly with other tools such as Vagrant. Vagrant provides an easy way to provision, and set up your hosts. Specifically, in this example: You will create a simple application running in two containers on separate hosts. This tutorial uses simple UNIX tools, and it doesn’t require any programming skills. This example will take about 15 minutes to complete. Bash Hackers Wiki Front page [Bash Hackers Wiki]

Cheat Sheet: Crontab by Example. Today's article may be pretty basic for regular readers but hopefully some may find it useful.

Cheat Sheet: Crontab by Example

This article will cover creating a crontab entry and show some examples of common crontabs. The Cron daemon is a service that runs on all main distributions of Unix and Linux and specifically designed to execute commands at a given time. These jobs commonly refereed to as cronjobs are one of the essential tools in a Systems Administrators tool box. LINUX. How to Learn bash shell and scripting – The best tutorials for bash beginners. Bash (Bourne-Again SHell) is a Linux and Unix-like system shell or command language interpreter.

It is a default shell on many operating systems including Linux and Apple OS X. If you have always used a graphic user interface like KDE or Gnome or MS-Windows or Apple OS X, you are likely to find bash shell confusing. If you spend some time with the bash shell prompt and it will be difficult for you to go back. Linux System Administrator's Guide. Bash String Manipulation Examples – Length, Substring, Find and Replace. In bash shell, when you use a dollar sign followed by a variable name, shell expands the variable with its value. This feature of shell is called parameter expansion. But parameter expansion has numerous other forms which allow you to expand a parameter and modify the value or substitute other values in the expansion process. In this article, let us review how to use the parameter expansion concept for string manipulation operations.

This article is part of the on-going bash tutorial series. Unix and Linux. Man page. - match command-line arguments to their help text. ShellCheck – Online shell script analyzer. Manage, share and source your aliases online. Learn the Linux command line. Write shell scripts. Examplenow - Linux, UNIX command line examples. Useful Unix commands for data science. Imagine you have a 4.2GB CSV file. It has over 12 million records and 50 columns.

All you need from this file is the sum of all values in one particular column. How would you do it? Writing a script in python/ruby/perl/whatever would probably take a few minutes and then even more time for the script to actually complete. A database and SQL would be fairly quick, but then you'd have load the data, which is kind of a pain.

Thankfully, the Unix utilities exist and they're awesome. Let's assume our data, which we'll call data.csv, is pipe-delimited ( | ), and we want to sum the fourth column of the file. cat data.csv | awk -F "|" '{ sum += $4 } END { printf "%.2f\n", sum }' The above line says: It took less than two minutes to run on the entire file - much faster than other options and written in a lot fewer characters. For those who are a bit newer to the command line than the rest of this post assumes, Hilary previously wrote a nice introduction to it. Other commands grep sed Additional Resources: Unix. Linux. Cron. LINUX. Ubuntu. Genaral commands Unix.

Distrowatch. Arch. Manjaro official. LINUX. Web Search Results.


Uninstall Survey. Recently I was developing at home, where I do not have Visual Assist; it was so much slower. It was like programming with stone knives and bearskins. Visual Assist has been so good I don't notice it anymore – until I use an IDE without it. Then, I wonder what's wrong with the IDE. David Smith Tyco Electronics We rely heavily on Visual Assist in my office.

Rasmus Anthin Surgical Science Inc Visual Assist has proven to always increase productivity. Kristoffer Danielsson Kaysoft Been using Visual Assist for quite a few years now and it's just gotten better and still better! John West Microsoft, PTLS Test Tech. I've become addicted to Visual Assist at work. Your product and support are top of the line. Kristen Overmyer Halifax Biomedical Inc. Just really, really thank you. Adrian Edmonds CMosaix Ltd. Every time I hear a developer complain about C++ support in VS, I point them to you guys. Chris Tartamella Bentley Systems, Inc. Linux-Unix Cheat Sheets - The Ultimate Collection. HowtoForge - Linux Howtos and Tutorials. XenoCafe - Learn Linux the easy way with our free comprehensive tutorials for beginners. Linux Commands - A practical reference.

The Incredible Guide to NEW Ubuntu (Karmic Koala) [PDF] Beginner's Guide to Nmap.