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Sep 22, 2023 linux home server hardware

ZFS - Replace a degraded disk/drive in a mirror pool

ZFS (Zettabyte File System) is a feature-rich and advanced file system known for its robust data integrity, snapshot capabilities, efficient copy-on-write mechanism, and support for

Sep 12, 2023 bash scripting linux

Bash - Get the length of a string

Bash provides several straightforward methods to determine the length of a string Method 1: Parameter expansion This is the way i use most → ${#variable} mystring=

Sep 1, 2023 security linux email

Security - Remove sensitive data from headers in Postfix

Email headers can provide sensitive and valuable information. For security purposes it is highly recommended to avoid sending private IP addresses, versions, etc... Example email

Jan 31, 2021 security linux

Security - Sudo vulnerability allows privilege scalation

A 10 year old sudo related flaw has been discovered that can make unprivileged users obtain root permissions. Linux admins should patch this critical vulnerability

Nov 23, 2020 security linux

Security - Error installing Kali: "Installation step failed"

When I was installing a Kali virtual machine, I came across an error in the “Software selection” step After confirming the software, the installation shows