Best gear for online meetings while working from home

The world is a different place in a coronavirus (COVID-19) pandemic. Many businesses are allowing their employees to work from home. People working from home are adjusting to this new environment which is a new territory for everyone living in the 21st century. Sure there have been pandemics in the past where people were told … Read more

What is an inode?

If you come from the Windows world, you may not be familiar with the concept of inode. This is not something you are exposed to until you journey into the Unix world. Even if you use Unix, you may or may not encounter an inode. It depends on how much you care about the systems … Read more

How to Delete Your Public Records From the Internet

With the ever growing use of the Internet and people’s information being stored online, is it possible to remove yourself from the Internet? Can you erase yourself completely from the digital universe? Unfortunately, the short answer is no. If you drive, vote, get married, or own a home, your information is already online. Courts and … Read more

What is Blockchain Technology?

Have you heard of Bitcoin? If you have, you may have heard of blockchain. Bitcoin and blockchain are not the same thing though. Bitcoin does use the blockchain technology. When there is a mention of blockchain, the name Satoshi Nakamoto comes up but this person is still a mystery to this day. Is this a … Read more

How to backup your LastPass Password?

Although your passwords are backed up by LastPass, it’s always a good idea to have a backup copy, just in case. The problem with cloud solutions you may use is that they are dependent on the service provider backing up your data. What if something happens to your data? In the case of passwords, it’s … Read more

Show Line Numbers in Vim

Vim (Vi iMproved) is a text editor for Unix. It is free and open-source software. It is a popular text editor for system administration and development work. When you start Vim, it looks minimal but it is very powerful under the hood. Depending on your level of comfort with Linux, you may use Vim for … Read more

Automation with Bash Scripts

Are you able to automate with Bash scripts? Definitely! Is this something you want to do all the time? Of course not! It depends on the situation. What is it that you are automating? If you are a System Administrator, SRE or a frequent user of Linux, Bash scripts come in handy. There are things … Read more

Understanding Big O Notation

Looking from the outside, Big O is very scary. Why? O is not an abbreviation for a word, it’s a concept. It’s a concept used in mathematics. It’s a concept in computer science when we want to talk about algorithms. What is algorithms? Yeah, that is another scary concept on its own but we’re here … Read more

Practical Tcpdump Examples

If you are a system administrator, system engineer, network engineer, or security professional, you know tcpdump is an essential tool to have in your tool belt. With this tool, you can go deep in getting to the bottom of a problem. When you start using tcpdump, people know you mean business. They know you’re going … Read more

How do you iterate over a dictionary in Python?

Suppose you have a piggy bank containing a lot of coins and you want to count them. You store your coins in a dictionary. Once you finish adding them in the dictionary, you want to know how much you have of each denomination. How do you do it? To see this example in real life … Read more

How to get the current time in Python?

There are many ways to get the current time in Python. Good thing Python has provided us with a module we can just import and use right away. Do consider how you plan to display the current time. Does it include the date with the time or is it just the time? If it includes … Read more

Comprehensive Guide to the Coronavirus

Get the latest information on what is happening with the coronavirus that is spreading across the world. The coronavirus pandemic has infected more than 2 million people in just a few months. The outbreak was started in Wuhan, Hubei Province, China, in December 2019 and recognized as a pandemic by the World Health Organization (WHO) … Read more

How to check if a Python list is empty?

Suppose you are writing a Python program and you want to check if a list is empty. How would you do it? This should be something that is very straightforward right? Or is it? The example could be a list of fruits that you are keeping track of. The list can be something like the … Read more

How do check if a directory exists in a Bash shell script?

If you write scripts in a Bash shell, you will eventually come across a need to check the existence of a directory. You may want to know if the directory exists before you start writing a file to it. You may want to know if a directory exists before automating some process that reads from … Read more