Scripting on Vivek's Blog

Disk Space Analysis in Linux

viveklp1995@gmail.com (Vivek Singh) — Sun, 02 Aug 2020 13:57:40 +0800

1. Overview

One of the most common administrative tasks while using Linux is finding out the disk space usage in our system. The most common command-line utilities to find the free disk space usage are the df (Disk Free) and du (Disk Usage commands).

In this tutorial, we will have a look at the common scenarios and usage of the du and df commands.

2. Common Usage Scenarios

We will be using the df and du commands interchangeably based on the information we are seeking, to check the amount of space used and free on our filesystem and partitions the df command is used additionally to check for space usage on a directory level the command du is used.

Converting Langfiles using Bash and Translate-Shell

viveklp1995@gmail.com (Vivek Singh) — Sun, 01 Dec 2019 21:57:40 +0800

Introduction

The most mundane task a developer can be asked to do is creating new lang files (adding support for Spanish,German ) in your app. Unless you are using a library for dynamic translation in your app or browser capabilities,the whole process to convert the base language file (say English) to other languages is just time-consuming also if the software you are working on is huge, say 5k lines of text on the base language file. Converting the file manually will take you days.

Intro to Regular Expressions

viveklp1995@gmail.com (Vivek Singh) — Sun, 01 Dec 2019 21:57:40 +0800

Introduction

Being a Linux user and not coming across Regular Expressions or regex is next to impossible. I kept seeing the cryptic little set of characters everywhere and the people who could use it looked like ninjas to me. They are everywhere text editor's, JavaScript, Python, JAVA , Bash……and the list goes on.

XKCD Regex Comic

What Exactly is a Regular Expression?

A regular expression is a string containing a combination of normal characters and special meta-characters or meta-sequences. The normal characters match themselves. Meta-characters and meta-sequences are characters or sequences of characters that represent ideas such as quantity, locations,or types of characters.