#Kali Linux Hack

Linux hot to remove a directory with -i flag #linux #techfairy #linuxcommand #linuxtips #terminallife

Starting my 15 Days of Linux Challenge 🔥 day1/15. Day 1: pwd — a simple command that shows your current folder location. Every cybersecurity journey begins with mastering the basics. #cyber #day1 #pwd #linux #linuxcommunity

I stand between chaos and your data. I don’t sleep. I don’t guess. I enforce. Firewall protects. Router delivers. Both deserve respect. Learn how networking really works. 👉 linuxcert.guru #linux #firewall #router #networking #sysadmin #linuxadmin #devops #cybersecurity #redhatlinux #rhcsa #linuxtraining #itcareer #serveradmin #learnlinux #linuxcertguru

Firewalls HATE this one trick! You can tunnel TCP packets, like SSH, right over boring old ICMP echo requests and replies helping sneak past those pesky firewalls!!

Linux Commands are easy! "ss -tlpn" allows you to see current ports in use on Linux Ports are used in networking for communications, for example port 80 is HTTP common for web servers. Follow for more! williambenz.com #networking #networkports #cybersecurity #ethicalhacking

free -h – Displays memory and swap usage in a human-readable format. #Linux #LinuxTips #LinuxCommand #FileSystem #VFAT #SysAdmin #DevLife #TechFairy #LearnLinux #TerminalLife #OpenSource #CrossPlatform #USBDrives #LinuxMagic

#linux #windows #larp #darkside #opsec

Share with someone who thinks firewall = antivirus😂 🔥 𝗜𝗡𝗧𝗘𝗥𝗩𝗜𝗘𝗪𝗘𝗥: “When a packet reaches your network… how does the firewall know whether to allow it or drop it?” 🧠 𝗕𝗘𝗚𝗜𝗡𝗡𝗘𝗥 𝗘𝗫𝗣𝗟𝗔𝗡𝗔𝗧𝗜𝗢𝗡 Imagine a gated society. At the gate, the guard checks: • Who you are • Where you’re coming from • Which flat you’re visiting • Whether your name is on the list If everything matches rules → you enter. If not → you’re stopped. Firewall is that guard. Every incoming and outgoing packet is inspected against predefined rules. No emotion. Just matching conditions. ⚙️ 𝗧𝗘𝗖𝗛𝗡𝗜𝗖𝗔𝗟 𝗕𝗥𝗘𝗔𝗞𝗗𝗢𝗪𝗡 A firewall evaluates packets based on: • Source IP • Destination IP • Source Port • Destination Port • Protocol (TCP/UDP/ICMP) • Connection state There are main types: 1️⃣ Packet Filtering Firewall (Stateless) Checks packet headers only. Rule example: Allow TCP from 192.168.1.0/24 to port 80 Block everything else. It doesn’t remember previous packets. Fast. Basic. 2️⃣ Stateful Firewall Keeps track of active connections. It knows: • This packet is part of an existing TCP session • SYN → SYN-ACK → ACK sequence It maintains a connection table. Smarter. Safer. 3️⃣ Application-Level Firewall (L7) Inspects packet payload. Can block: • Suspicious HTTP patterns • SQL injection attempts • Malicious content More powerful. More CPU heavy. 🚀 𝗦𝗬𝗦𝗧𝗘𝗠 𝗟𝗘𝗩𝗘𝗟 𝗜𝗡𝗦𝗜𝗚𝗛𝗧 Firewalls work using: Rule evaluation from top to bottom. First match wins. Poorly ordered rules: • Increase latency • Create accidental vulnerabilities • Block legitimate traffic Also: Stateful firewalls consume memory to track sessions. At scale, connection tracking becomes expensive. Security always trades off with performance. 🎯 𝗜𝗡𝗧𝗘𝗥𝗩𝗜𝗘𝗪 𝗙𝗟𝗘𝗫 Firewalls enforce security policies by evaluating packet headers and, in advanced cases, payload data against rule sets, optionally maintaining connection state for session-aware filtering. Stateful inspection improves security but increases resource overhead. 🔥 𝗙𝗜𝗡𝗔𝗟 𝗧𝗥𝗨𝗧𝗛 A firewall doesn’t “understand intent.” It enforces rules. Relentlessly. Still not following me?? #systemdesign #computerscience #javascript

Passwordless login in Linux uses SSH key pairs for secure authentication. A private key stays on your system, while the public key is added to the server. This eliminates password transmission and enables strong, cryptographic access control. Proper key management, passphrases, permissions, and rotation, is essential. #linux #software #computerscience #programming #cybersecurity

Linux input device drivers #Linux #LinuxTips #LinuxCommand #FileSystem #VFAT #SysAdmin #DevLife #TechFairy #LearnLinux #TerminalLife #OpenSource #CrossPlatform #USBDrives #LinuxMagic

The shebang (#!) at the top of a script tells the system which interpreter to use when you run it. No shebang? Linux has no idea how to execute your file 🐧💻 #Linux #LinuxTips #LinuxCommand #freeCommand #SysAdmin #DevLife #TechFairy #LearnLinux #TerminalLife #OpenSource #CodingTips #TechEducation #MemoryManagement #LinuxMagic

chmod isn’t always enough. What if you need to give access to just ONE specific user — without changing group permissions? 👀 That’s where ACL comes in 🔐 More control. More precision. Real Linux admin power 🐧🔥 Follow for serious Linux knowledge. #Linux #LinuxSecurity #ACL #SysAdminLife #devops