Kali Linux Tutorials

Both git fetch and git pull talk to a remote repository, but they do very different things to your current branch. Mixing them up is one of the most common causes of unexpected merge commits and "how did my branch end up like this" moments. How git fetch

Sometimes the change you need already exists, just on the wrong branch. A hotfix lands on main when it also needs to go to a release branch, or one useful commit is buried in a feature branch you do not want to merge wholesale. git cherry-pick copies the

Email is still one of the most important communication channels inside modern applications. Password resets, login alerts, invoices, order confirmations, onboarding messages, account notifications, security warnings, and marketing automation all depend on

Nginx is a high-performance web server and reverse proxy trusted by some of the largest sites on the internet. This guide covers the commands you reach for every day: starting and stopping the service, reloading configuration without dropping connections,

ufw (Uncomplicated Firewall) sits on top of iptables (or nftables on newer systems) and replaces complex packet-filter rules with readable commands. It is the standard firewall tool on Ubuntu and Debian. The kernel still enforces the actual rules, ufw is

When you share a server with a team or investigate unexpected activity, the first question is simple: who is on this machine right now? The who command reads from the system session records and answers exactly that it lists every active user session with

The file command inspects the actual contents of a file and reports its type - regardless of the name or extension. A file called photo.jpg could be a PNG, an ELF binary, or plain text. The file command shows you what it actually is. How to Use the file C

chattr sets and removes special file attributes that operate at the filesystem level, separate from standard permission bits. You can mark a file immutable so nothing can delete or overwrite it, or set a log file to append-only so new entries go in but ex

env prints the current environment, sets or removes variables for a single command, and can start a process with an entirely clean environment. All changes it makes are scoped to the command it launches - your current shell is never touched. How to Use th

Learn how to use the nmap command in Linux. Covers SYN vs TCP connect scan, port states, -sn -Pn -n -sV -O -A, target ranges, and saving output.