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📝 Description: This repository contains a 90-day cybersecurity study plan, along with resources and materials for learning various cybersecurity concepts and technologies. The plan is organized into daily tasks, covering topics such as Network+, Security+, Linux, Python, Traffic Analysis, Git, ELK, AWS, Azure, and Hacking. The repository also includes a `LEARN.md

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==================================
🧠 By: https://t.me/DataScienceN

Top 30 Cyber Security Commands & Tools

#CyberSecurity #Reconnaissance #InfoGathering

#1. ping
Tests reachability of a host on an IP network and measures round-trip time.

ping -c 4 google.com

PING google.com (142.250.72.14) 56(84) bytes of data.
64 bytes from lhr48s23-in-f14.1e100.net (142.250.72.14): icmp_seq=1 ttl=118 time=8.53 ms
...
--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms

#2. whois
Retrieves registration information for a domain name or IP address.

whois google.com

Domain Name: GOOGLE.COM
Registry Domain ID: 2138514_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.markmonitor.com
...
Registrant Organization: Google LLC
Registrant State/Province: CA
Registrant Country: US

#3. dig
(Domain Information Groper) A tool for querying DNS servers.

dig google.com

; <<>> DiG 9.18.1-1-Debian <<>> google.com
;; ANSWER SECTION:
google.com.  156 IN A 142.250.187.238
...
;; Query time: 12 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)

#4. nmap
Network Mapper. A powerful tool for network discovery, port scanning, and security auditing.

nmap -sV -p 80,443 scanme.nmap.org

Starting Nmap 7.92 ( https://nmap.org ) at ...
Nmap scan report for scanme.nmap.org (45.33.32.156)
Host is up (0.16s latency).

PORT    STATE SERVICE  VERSION
80/tcp  open  http     Apache httpd 2.4.7 ((Ubuntu))
443/tcp open  ssl/http Apache httpd 2.4.7 ((Ubuntu))

#5. netcat (nc)
The "Swiss army knife" of networking. Can be used for port scanning, file transfer, and creating backdoors.

nc -zv scanme.nmap.org 80

Connection to scanme.nmap.org (45.33.32.156) 80 port [tcp/http] succeeded!

---
#CyberSecurity #Networking #Analysis

#6. netstat
Displays active network connections, routing tables, and interface statistics.

netstat -tulpn

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address      Foreign Address    State       PID/Program name
tcp        0      0 127.0.0.1:5432     0.0.0.0:*          LISTEN      675/postgres
tcp        0      0 0.0.0.0:22         0.0.0.0:*          LISTEN      789/sshd
udp        0      0 0.0.0.0:68         0.0.0.0:*                      654/dhclient

#7. traceroute
Traces the network path (hops) to a remote host.

traceroute 8.8.8.8

traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
 1  gateway (192.168.1.1)  1.234 ms  1.567 ms  1.890 ms
 2  isp-router.net (10.0.0.1)  5.432 ms  5.678 ms  5.901 ms
 ...
10  142.251.52.221 (142.251.52.221)  10.112 ms  10.345 ms  10.578 ms
11  dns.google (8.8.8.8)  10.801 ms  10.923 ms  11.045 ms

#8. tcpdump
A powerful command-line packet analyzer that allows you to capture and display network traffic.

sudo tcpdump -i eth0 -c 5 port 80

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
14:30:01.123456 IP my-pc.54321 > example.com.80: Flags [S], seq 123456789, win 64240, options [mss 1460,sackOK,TS val 10,ecr 0], length 0
... (4 more packets) ...
5 packets captured

#9. arp
Displays and modifies the Address Resolution Protocol (ARP) cache, which maps IP addresses to MAC addresses.

arp -a

? (192.168.1.1) at 00:1a:2b:3c:4d:5e [ether] on eth0
? (192.168.1.105) at 98:76:54:32:10:fe [ether] on eth0

#10. ip
A modern tool to show and manipulate routing, devices, policy routing, and tunnels. (Replaces ifconfig).

ip addr show

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 ...
    inet 127.0.0.1/8 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 ...
    inet 192.168.1.100/24 brd 192.168.1.255 scope global dynamic eth0

---
#CyberSecurity #WebSecurity #Vulnerability

#11. curl
A tool to transfer data from or to a server, using various protocols. Essential for interacting with web APIs and inspecting HTTP headers.

curl -I http://example.com

HTTP/1.1 200 OK
Content-Encoding: gzip
Accept-Ranges: bytes
Cache-Control: max-age=604800
Content-Type: text/html; charset=UTF-8
Date: Fri, 27 Oct 2023 10:00:00 GMT
Server: ECS (dcb/7F83)
Content-Length: 648

#12. gobuster
A fast tool used to brute-force URIs (directories and files), DNS subdomains, and virtual host names.

gobuster dir -u http://example.com -w /usr/share/wordlists/dirb/common.txt

===============================================================
Gobuster v3.5
===============================================================
[+] Url:                     http://example.com
[+] Threads:                 10
[+] Wordlist:                /usr/share/wordlists/dirb/common.txt
===============================================================
/index.html           (Status: 200) [Size: 1256]
/images               (Status: 301) [Size: 178] -> http://example.com/images/
/javascript           (Status: 301) [Size: 178] -> http://example.com/javascript/

#13. nikto
A web server scanner which performs comprehensive tests against web servers for multiple items, including over 6700 potentially dangerous files/CGIs.

nikto -h http://scanme.nmap.org

- Nikto v2.1.6
---------------------------------------------------------------------------
+ Target IP:          45.33.32.156
+ Target Hostname:    scanme.nmap.org
+ Target Port:        80
+ Start Time:         ...
---------------------------------------------------------------------------
+ Server: Apache/2.4.7 (Ubuntu)
+ The anti-clickjacking X-Frame-Options header is not present.
+ OSVDB-3233: /icons/README: Apache default file found.

#14. sqlmap
An open-source penetration testing tool that automates the process of detecting and exploiting SQL injection flaws.

sqlmap -u "http://testphp.vulnweb.com/listproducts.php?cat=1" --dbs

...
available databases [2]:
[*] information_schema
[*] acuart

#15. whatweb
Identifies different web technologies including content management systems (CMS), blogging platforms, statistic/analytics packages, JavaScript libraries, web servers, and embedded devices.

whatweb scanme.nmap.org

http://scanme.nmap.org [200 OK] Apache[2.4.7], Country[UNITED STATES], HTTPServer[Ubuntu Linux][Apache/2.4.7 ((Ubuntu))], IP[45.33.32.156], Script, Title[Go ahead and ScanMe!], Ubuntu

---
#CyberSecurity #PasswordCracking #Exploitation

#16. John the Ripper (john)
A fast password cracker, currently available for many flavors of Unix, Windows, DOS, and OpenVMS.

# Assume 'hashes.txt' contains 'user:$apr1$A.B.C...$...'
john --wordlist=/usr/share/wordlists/rockyou.txt hashes.txt

Using default input encoding: UTF-8
Loaded 1 password hash (md5crypt, 32/64 OpenSSL)
Press 'q' or Ctrl-C to abort, almost any other key for status
password123      (user)
1g 0:00:00:01 DONE (2023-10-27 10:15) 0.9803g/s 1234p/s 1234c/s
Session completed

#17. hashcat
An advanced password recovery utility that can crack a wide variety of hash types using multiple attack modes (dictionary, brute-force, mask).

# -m 0 = MD5 hash type
hashcat -m 0 -a 0 hashes.md5 /usr/share/wordlists/rockyou.txt