Linux

Troubleshoot DNS Issues with `NSLookup`

2023-03-12
Bash (category), Linux (category), Networking (category), Windows (category)

NSLookup is a powerful tool for network administrators and IT professionals that helps in troubleshooting DNS-related issues. It is a command-line utility that allows you to query the DNS records of a domain or IP address and receive information about its associated domain name or IP address. In this blog,… Read More »Troubleshoot DNS Issues with NSLookup

Get to the Root of Network Issues with `TCPdump`

2023-02-18
Linux (category), Networking (category)

TCPdump is a network packet analyzer that runs on various operating systems including Linux, BSD, and macOS. It allows you to capture and save network traffic to a file, and then analyze it later using various tools. The captured data can be in the form of a packet trace, which… Read More »Get to the Root of Network Issues with TCPdump

Capture, Monitor, Analyze & Troubleshoot Network Traffic with `Tcpdump`

2023-03-12
Bash (category), Linux (category), Networking (category), Security (category)

Tcpdump is a packet analyzer that runs on the command line. It captures network packets and displays the information contained in them in a human-readable format. It can capture packets from a specific interface, a host, or a network, and can filter the packets based on various criteria, such as… Read More »Capture, Monitor, Analyze & Troubleshoot Network Traffic with Tcpdump

Comparing and Contrasting Two Files With `diff Command`

2023-02-18
Linux (category)

The diff command is a staple of Linux, used to compare and contrast the contents of two files. Whether you’re a seasoned power user or just starting to delve into the world of Linux, understanding the diff command is a must. Basic Usage The basic syntax for the diff command… Read More »Comparing and Contrasting Two Files With diff Command

Comparing IT `Automation Tools` For Configuration Management

2023-03-12
Automation (category), Bash (category), Puppet (category), Scripting (category)

IT automation is a rapidly growing area in the IT field. Organizations are increasingly relying on automation to reduce costs, increase efficiency, and improve the quality of their IT services. Bash Scripts Bash scripts can be used to automate tasks such as setting up and configuring servers, creating backups, and… Read More »Comparing IT Automation Tools For Configuration Management

Automate `Auditing of User Accounts` with a Bash Script

2023-03-12
Automation (category), Bash (category), Linux (category), Productivity (category), Scripting (category), Security (category)

Creating the Script In this example, we’ll be detecting changes to the system’s user accounts by using the cat command to read the /etc/passwd file. We’ll then store the output in a variable. Next, we’ll use a while loop to continuously check the user accounts and compare it to the… Read More »Automate Auditing of User Accounts with a Bash Script

Recall and Reuse Previous Commands With Bash `History`

2023-03-12
Bash (category), Linux (category)

The bash history command is a built-in shell feature that allows you to recall and reuse previous commands. It works by keeping a record of all the commands you enter in the shell and providing you with a way to recall them. You can access the history of your commands… Read More »Recall and Reuse Previous Commands With Bash History

Learn How to Detect `Uptime` Changes With a Bash Script

2023-03-12
Automation (category), Bash (category), Linux (category), Productivity (category), Scripting (category)

Creating a bash script to detect and respond to system changes can be a powerful tool. In this blog, we’ll go over how to create such a script and explore some practical use-cases for it. Creating the Script The first step in creating our script is to decide what changes… Read More »Learn How to Detect Uptime Changes With a Bash Script

`Last Command`: Your Instant Command History

2023-03-12
Bash (category), Linux (category)

The history command is a lifesaver, as it shows you a list of all the commands you’ve typed in the current shell session. However, what if you just want to see the last command you executed without having to scroll through the entire list? Enter the !! (or “bang bang”)… Read More »Last Command: Your Instant Command History

Stop & Go with the Bash `Sleep` Command

2023-03-12
Bash (category), Linux (category), Scripting (category)

The Bash Sleep Command is a built-in function of the Linux Bash shell that allows you to pause the execution of your scripts or terminal commands for a specified amount of time. Practical Use-Cases for the Bash Sleep Command 1. Delay the Execution of Scripts You can use the sleep… Read More »Stop & Go with the Bash Sleep Command