Exam 101: Control mounting and unmounting of filesystems

Linux filesystems The Linux filesystem is one big tree rooted at /, and yet we have filesystems on different devices and partitions. How do we resolve this apparent incongruity? The root (/) filesystem is mounted as part of the initialization process. Each of the other filesystems that you...

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wc command in Linux with examples - 2020

wc stands for word count. As the name implies, it is mainly used for counting purpose. ◉ It is used to find out number of lines, word count, byte and characters count in the files specified in the file arguments. ◉ By default it displays four-columnar output. ◉...

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‘dd’ command in Linux - 2020

dd is a command-line utility for Unix and Unix-like operating systems whose primary purpose is to convert and copy files. ◈ On Unix, device drivers for hardware (such as hard disk drives) and special device files (such as /dev/zero and /dev/random) appear in the file system just like...

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Why Linux is Better?

Look around and you will see Linux everywhere, yes it is right! Linux is present in Android phones. Android uses the Linux kernel under the hood. As Linux is an open-source operating system, Google’s Android developers generally modify the Linux kernel to satisfy their requirements. Linux offers the...

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Unix/Linux ‘alias’ command examples

Unix and Linux aliases are a really nice way of customizing the command line to work the way you want it to work. With alias commands, you’re essentially doing a little programming, and creating new Unix and Linux commands custom-tailored to the way you work. You can create...

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An `egrep` example with multiple regular expressions

Summary: How to use the Linux egrep command with multiple regular expressions (regex patterns). As a quick note here today, I just used the Linux egrep command to perform a case-insensitive search on multiple regular expressions (regex patterns). Really, what I did was a little more complicated: locate...

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Linux pipe command examples (command mashups)

One of my favorite things about Unix, Linux, and Mac OS X systems is that you can create your own commands by merging other commands. There isn't any formal name for these command combinations, other than to say that you're "piping" commands together, so I recently started referring...

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Sysvale and LPI: Strategic planning in times of COVID-19

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When 2019 was just about to end, I got a message from Eugênio Marques, CEO of Sysvale Softgroup, a healthtech that has been collaborating with the Linux Professional Institute (LPI) since its foundation a little more than five years ago. Eugênio asked me to recommend someone who could...

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Linux Professional Institute DevOps Tools Engineer

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Businesses across the globe are increasingly implementing DevOps practices to optimize daily systems administration and software development tasks. As a result, businesses across industries are hiring IT professionals that can effectively apply DevOps to reduce delivery time and improve quality in the development of new software products. To...

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Best Linux Certifications: RHCE, LPI, CompTIA, Linux Foundation, Oracle - 2020

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Linux certifications are highly recommended by many companies as Linux gaining recognition by global platforms these days. These certification programs are gaining popularity among data administrators, system admins, DevOps engineers. It helps IT, professionals, to get knowledge and recognition. Why Linux Certification? ◈ Most of the hiring manager...

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fmt command in Linux with examples

fmt command in LINUX actually works as a formatter for simplifying and optimizing text files. Formatting of text files can also be done manually, but it can be really time consuming when it comes to large text files, this is where fmt comes to rescue. fmt re formats...

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How to Work Remotely and Securely with FOSS Tools

With the advent of global problems such as Coronavirus (COVID-19) and the need for social distancing to help mitigate the spread of such diseases, many organizations are looking to remote solutions. A well-designed disaster recovery plan would already have policies in place for employees to work remotely in...

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Unix / Linux - File Management

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We will discuss in detail about file management in Unix. All data in Unix is organized into files. All files are organized into directories. These directories are organized into a tree-like structure called the filesystem. When you work with Unix, one way or another, you spend most of...

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