Linux provides many commands, that can be used for many different purposes and situations, to either obtain information quickly or to solve any problem with a script. One of them serves for counting lines, words or characters in a file…
Here’s another useful Linux command, the ps, that will show which processes are running in the system to troubleshoot, audit, forensics and so on. Since it is commonly used for these purposes, the recommendation is to get familiar with it…
The cut Linux command is a useful tool to extract the desired data from a delimited format file or output like csv, xml or json. Normally, depending on the type of file, it needs some preprocessing before gathering successfully the…
When you troubleshoot or audit a system by handling its log files, it might be useful to get the first lines of them in order to know, the timestamp or date of when the file was created or newly rotated,…
One of the most commonly used commands in Linux systems to handle the date inside the files is the tail command which basically, prints the last lines of it as you may presume with the command name. Although it seems…
Running processes in the background in Linux systems represents one of the most common ways to perform some batch process or long running process in parallel, without keeping busy your current terminal and consequently forcing you to wait until the…
Trivy is a vulnerability scanning tool mainly used for containers images, that helps cybersecurity professionals to obtain such information from them by either running it on demand, or automating its execution in any CI pipeline security testing step. It is…
Do you need in your cybersecurity program a tool for assessing the security and hardening status of your organisation Linux systems without cumbersome deployments or setups? If so, then the tool you are looking for is Lynis which is a…
Nikto is an open source web application scanning tool which helps cybersecurity professionals to cover such activities in an easy, fast paced and in a command line manner. Thanks to its simplicity, it is really a piece of cake to…
The asymmetric encryption is one of the security advances that makes the internet connections and online transactions trustable. Without this trust, nobody are willing to do business or perform any purchase on any e-commerce no matter how fast and convenient…
One of my favourite Linux commands is less which is also the one that I use the most when the troubleshooting activities needs to review some sort of logs, config files, audit files and so on. Thanks to this great…
Imagine a one way function that is able to map an input with infinite possibilities to a fixed length and “unique” output. Note that unique is quoted since theoretically is not possible to map an infinite set to a finite…
