How to enable LUKS disk encryption with keyfile on Linux
We can easily add a key file to LUKS disk encryption on Linux when running the cryptsetup command. A key file is used as the passphrase to unlock an encrypted …
How to Check CPU is 64/32 Bit in Linux System
As a system administrator and IT professional, it is very important to know whether the system’s CPU architecture is 32 bit or 64 bit. When it comes to third-party applications …
Raspberry Pi Pico released and available at $4 only
Last year, the Raspberry Foundation also released a brand new version of the Raspberry PI PC (personal computer), and it is directly built into a small-sized keyboard. Now there is …
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 …
Significant vulnerabilities that crippled IT world this decade (2010-2020)
The last ten years in the computer and IT security world are crippled with so many vulnerabilities. We saw massive cloud computing adoption and end-users using mobile devices with high …
How to write FreeBSD image to USB disk for installation using dd command
FreeBSD is an open-source and free Unix-like operating system descended from the Berkeley Software Distribution (BSD). This quick tutorial explains how to download and prepare the USB stick/pen drive to …
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 …
How to restart CentOS or RHEL server safely
I use the reboot command to reboot our PostgreSQL server running on RHEL 7. We have a development server running on CentOS 7 too. However, sometimes I noticed database corruption …
How to configure Intel Wifi on Debian Linux when you get firmware: failed to load iwlwifi-8265-36.ucode error
I have an Intel Corporation Wireless/WiFi 8265 / 8275 (rev 78) card. How do I configure this card? I always get an error, “iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-8265-36.ucode“. …