Quick Tip: Turn off the login banner in Linux or Unix .hushlogin file
Did you know? You can turn off the banner in Linux or Unix using a particular file. When you log in using ssh or other methods, you will find tons …
How to install Dart on Linux and set up VIM as IDE
Dart is easy to use BSD licensed programming language to build mobile, desktop, server, and web apps. Google creates and maintains the Dart ecosystem. It follows C-style syntax. We can …
Adding spice to your sudo session with a lecture file on Linux or Unix
Despite some severe bugs in sudo, it remains the defacto tool to gain root shell or run command as another user on Linux, macOS, and Unix-like systems. The sudo command …
duf – Disk Usage/Free Utility for Linux, BSD, macOS & Windows
We use the df command to show how much disk space is free on mounted file systems in Linux, macOS, and Unix-like systems. We also have the du command to …
How to unlock LUKS using Dropbear SSH keys remotely in Linux
On Linux, we encrypt our partitions and entire disk using Linux Unified Key Setup-on-disk-format (LUKS) for security and privacy reasons. We unlock LUKS protected disk by providing a passphrase at …
How to change LUKS disk encryption passphrase in Linux
We use encryption to protect mobile devices. For instance, I always use LUKS disk encryption to protect all files stored on my SSD. Dm-crypt (Cryptsetup and LUKS) open-source disk encryption …
GNU/Bash 5.1 released with the random ${SRANDOM} number engine
Current GNU/Bash maintainer Chet Ramey announced the latest major release, Bash 5.1, on December 7th, 2020. Bash is the default shell on many Linux distros and popular among developers, especially …
Linux set up bluetooth speaker to stream audio from your Android / iOS mobile phone
So how do you stream audio from your Apple iOS or Google Android phone to your laptop speaker? Let us see how to set up a Bluetooth speaker to stream …
Quick tip: Display banner/message before OpenSSH authentication
Want to display a message or banner before OpenSSH (SSHD server) authentication? Try this simple tip to show the banner or ASCII logo on your Linux or Unix system.OpenSSH has …
How to backup and restore LUKS header on Linux
Previously I explained how to encrypt Linux partitions or disk with the LUKS (Linux Unified Key Setup)/dm-crypt. In this quick blog post, I will explain how to backup and restore …