articleCategorySubscribe

Manipulating Strings in Linux with tr 1. Overview In this tutorial, we’ll see how to manipulate strings using the tr in Linux. Note that we’ve tested these commands using Bash, but should work on any POSIX-compliant terminal. 2. Lower Case to Upper Case First of all, let’s see the synopsis… Continue Reading tr-manipulate-strings

Guide to Stream Redirections in Linux 1. Introduction Whenever we work on the Linux command line, we often have to pass data from one command to another, like feeding a list of find results into a grep. This is where streams come into play. In this tutorial, we’ll take a look at what… Continue Reading stream-redirections

Guide to Linux jq Command for JSON processing 1. Overview JSON is a widely used structured data format typically used in most modern APIs and data services. It’s particularly popular in web applications due to its lightweight nature and compatibility with Javascript. Unfortunately, shells such as Bash can’t interpret and… Continue Reading jq-command-json

Difference Between sort | uniq and sort -u 1. Overview In this tutorial, we’ll do a quick comparison of the Linux commands sort | uniq and sort -u. Both use sort to remove duplicate entries from a list, but they operate in slightly different manners. Note that all commands below are platform-independent. 2.… Continue Reading sort-uniq-vs-sort-u

Guide to the Linux find Command 1. Introduction The Linux https://en.wikipedia.org/wiki/Find(Unix)[find]_ command can be used to find files and directories on a disk. It provides several command-line options that make it a powerful tool. In this tutorial, we’ll look at how to use the find command. 2. Syntax Let’s quickly… Continue Reading find-command

Linux Commands – top 1. Overview It’s quite common to find ourselves in a situation where we need to know the resource usage of each process and thread in our system. For example, we might want to know which process is slowing down our system. In this tutorial, we’ll look… Continue Reading top-command

Linux Commands – Delete Files Older Than X 1. Overview We often need to tidy up files on our workstations or servers. Our applications may produce logs or temporary files. One common use case is to delete files that are above a certain age. In this tutorial, we’ll look at… Continue Reading delete-files-older-than

Execute a Command in Multiple Directories on Linux 1. Introduction In this tutorial, we’ll explore a few Bash approaches to execute the same command in multiple directories. 2. A Closer Look First of all, let’s break down the goal into smaller steps: list the contents of the current folder filter… Continue Reading execute-command-directories

Pipes and Redirection in Linux 1. Introduction Most shells offer the ability to alter the way that application input and output flows. This can direct output away from the terminal and into files or other applications, or otherwise reading input from files instead of the terminal. 2. Standard Input and… Continue Reading pipes-redirection

Concatenating Files in Linux 1. Introduction Sometimes, we need to do some operations that require using multiple files at the same time. This can be something as common as searching for some text in multiple files or merging multiple files into a new one. In this quick tutorial, we’ll show… Continue Reading concatenating-files