root@linux:~# system_status --online

I'M have completed six months postgraduate diploma in High Performance Computing System Administration from ACTS C-DAC Pashan, Pune. I am looking forward to kick-start my career Skills:Linux, Python and HPC System, Bash scripting,VMware. Technologies and Tools Technologies: (High performance Computing) | Linux| Python | Cloud | AWS | DevOps | Docker | Kubernetes | Jenkins | Networking | Perl | Hadoop | Storage| VMware | . Tools: xCAT, Nagios, LVM, RAID, Lustre, Slurm.

Tools and technologies that I have worked with and am interested in

Linux	bash	Kali	Ubuntu	Arch	Debian	Perl
Python	Github	Docker	Kubernetes	AWS	Jenkins	Nginx
Git	GitLab	HTML	CSS	Bootstrap	PostgreSQL	Graphql

╔══════════════════════════════════════════════════════════════╗ ║ HACKER SYSTEM INTERFACE ║ ╠══════════════════════════════════════════════════════════════╣ ║ USER : root ║ ║ HOST : linux-system ║ ║ STATUS : ONLINE ║ ║ NETWORK : CONNECTED ║ ║ FIREWALL : ACTIVE ║ ║ SECURITY : ENABLED ║ ║ MODE : HACKER ║ ╚══════════════════════════════════════════════════════════════╝

> ⚠️ **Educational / Defensive Mode:**
> This project demonstrates Linux, terminal, networking, system administration,
> automation, and cybersecurity concepts in a safe lab environment.

---

## ⚡ LIVE SYSTEM

```bash
$ whoami
root

$ hostname
linux-system

$ uptime
System online

$ systemctl is-system-running
running

$ ping -c 1 127.0.0.1
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time<1ms

$ echo "HACKER MODE"
HACKER MODE ACTIVATED

┌──(root㉿linux)-[~]
└─# ./system-monitor.sh

[+] Booting system.................... OK
[+] Loading kernel.................... OK
[+] Checking memory................... OK
[+] Checking CPU...................... OK
[+] Checking storage................. OK
[+] Checking network................. OK
[+] Checking services................ OK
[+] Security modules................. OK

████████████████████████████████ 100%

SYSTEM STATUS: ONLINE

# Operating System Information
uname -a

# Distribution information
cat /etc/os-release

# Kernel version
uname -r

# CPU information
lscpu

# Memory information
free -h

# Disk information
lsblk

# Network interfaces
ip addr

CPU     [██████████████████░░] 82%
MEMORY  [██████████████░░░░░░] 68%
DISK    [██████████░░░░░░░░░░] 49%
NETWORK [████████████████░░░░] 76%

top
htop
free -h
df -h
du -sh *
uptime
vmstat
iostat

$ ip addr

1: lo:
    inet 127.0.0.1/8
    state UP

2: eth0:
    state UP
    network: CONNECTED

ip addr
ip route
ping google.com
traceroute google.com
ss -tuln
nslookup example.com
dig example.com
curl https://example.com

╔════════════════════════════════════════════╗
║             SECURITY MONITOR               ║
╠════════════════════════════════════════════╣
║ Firewall             : ENABLED             ║
║ SSH                   : PROTECTED           ║
║ Updates               : CHECKED             ║
║ Authentication       : ACTIVE              ║
║ Network              : MONITORED           ║
║ System Integrity     : NORMAL              ║
╚════════════════════════════════════════════╝

sudo ufw status
sudo systemctl status ssh
sudo journalctl -p warning
sudo last
sudo ss -tulpen

┌──(user㉿linux)-[~/system]
└─$ ./matrix.sh

Wake up...
The system is waiting.

Initializing terminal...
[OK]

Loading modules...
[OK]

Connecting to localhost...
[OK]

Access level:
USER

Environment:
LINUX

Status:
ONLINE

01001000 01000001 01000011 01001011
01000101 01010010 00100000 01001101
01001111 01000100 01000101

> SYSTEM READY
> NETWORK READY
> TERMINAL READY
> ADMIN READY

# Process list
ps aux

# Find a process
ps aux | grep process

# Kill your own process
kill <PID>

# Current directory
pwd

# List files
ls -lah

# Change directory
cd /var/log

# Read logs
sudo journalctl

# Check services
systemctl --type=service

$ df -h

Filesystem      Size  Used Avail Use%
/dev/sda1       100G   42G   58G  42%

# Show mounted filesystems
df -h

# Show block devices
lsblk

# Show directory size
du -sh /var/log

# Find large files
find /var -type f -size +100M

#!/bin/bash

echo "[+] Starting system monitor..."

while true
do
    clear

    echo "=============================="
    echo "      SYSTEM MONITOR"
    echo "=============================="

    echo "Hostname: $(hostname)"
    echo "Kernel  : $(uname -r)"
    echo "Uptime  : $(uptime -p)"

    echo
    echo "Memory:"
    free -h

    echo
    echo "Disk:"
    df -h /

    sleep 5
done

             ┌───────────────┐
             │     BOOT      │
             └───────┬───────┘
                     ↓
             ┌───────────────┐
             │ KERNEL LOAD   │
             └───────┬───────┘
                     ↓
             ┌───────────────┐
             │ NETWORK START │
             └───────┬───────┘
                     ↓
             ┌───────────────┐
             │ SERVICES      │
             └───────┬───────┘
                     ↓
             ┌───────────────┐
             │ SYSTEM ONLINE │
             └───────────────┘

Linux
Bash
Git
GitHub
SSH
Docker
Nginx
Apache
AWS
Python
C
C++
PostgreSQL

git init
git status
git add .
git commit -m "Initial commit"
git branch -M main
git remote add origin <repository-url>
git push -u origin main

# Connect to a Linux server
ssh user@server-ip

# Generate an SSH key
ssh-keygen -t ed25519

# Check SSH service
sudo systemctl status ssh

# Restart SSH service
sudo systemctl restart ssh

# Check Nginx
sudo systemctl status nginx

# Start Nginx
sudo systemctl start nginx

# Enable Nginx at boot
sudo systemctl enable nginx

# Test configuration
sudo nginx -t

docker --version
docker ps
docker images
docker pull ubuntu
docker run -it ubuntu

             CLOUD SYSTEM
                  │
       ┌──────────┼──────────┐
       ↓          ↓          ↓
      AWS       Azure       GCP
       │          │          │
       ↓          ↓          ↓
    Compute    Virtual      Cloud
    Storage    Machines    Services

• Linux system administration
• Bash scripting
• Networking fundamentals
• Git and GitHub
• Web server management
• Cloud fundamentals
• Container technology
• System monitoring
• Defensive cybersecurity
• Automation

[15:00:01] Kernel initialized
[15:00:02] Network interface detected
[15:00:03] DNS resolver started
[15:00:04] SSH service loaded
[15:00:05] Web server loaded
[15:00:06] Firewall enabled
[15:00:07] Monitoring started
[15:00:08] SYSTEM ONLINE

[✓] Linux Environment
[✓] Terminal Interface
[✓] System Monitoring
[✓] Network Monitoring
[✓] Automation
[✓] Git Integration
[✓] Server Management
[✓] Security Awareness
[✓] Cloud Learning
[✓] DevOps Practice

╔══════════════════════════════════════════╗
║             SYSTEM STATUS                ║
╠══════════════════════════════════════════╣
║                                          ║
║       ██████╗ ███╗   ██╗                 ║
║      ██╔═══██╗████╗  ██║                 ║
║      ██║   ██║██╔██╗ ██║                 ║
║      ██║   ██║██║╚██╗██║                 ║
║      ╚██████╔╝██║ ╚████║                 ║
║       ╚═════╝ ╚═╝  ╚═══╝                 ║
║                                          ║
║       HACKER MODE: ACTIVE                ║
║       SYSTEM: ONLINE                     ║
║       NETWORK: CONNECTED                ║
║       SECURITY: ENABLED                 ║
║                                          ║
╚══════════════════════════════════════════╝

Code → Learn → Test → Automate → Monitor

This repository is intended for education, Linux administration, system monitoring, networking practice, automation, and defensive cybersecurity learning.

Only use security-related techniques on systems and networks that you own or have explicit permission to test.

████████████████████████████████████████
        SYSTEM CONNECTION ACTIVE
████████████████████████████████████████

Learn • Practice • Automate • Deploy • Manage Linux Systems

This repository is designed for learning and practicing Linux Administration, Linux Commands, Shell Scripting, Networking, Git, Web Servers, System Administration, and DevOps fundamentals.

The project contains practical examples that can be executed on Ubuntu, Debian, Fedora, Rocky Linux, AlmaLinux, Arch Linux, and other Linux distributions.

Linux is an open-source operating system widely used for:

• 🖥️ Desktop computers
• 🗄️ Servers
• ☁️ Cloud computing
• 📦 Containers
• 🌐 Networking
• 🔐 Security
• 🚀 DevOps
• 🤖 Embedded systems
• 🧪 Research and HPC

• 🐧 Linux fundamentals
• 💻 Linux command-line practice
• 📁 File and directory management
• 👤 User and group administration
• 🔐 File permissions
• 🌐 Network configuration
• 📡 SSH administration
• 📦 Package management
• ⚙️ Process management
• 💾 Disk management
• 🔥 Firewall configuration
• 📝 Bash scripting
• 🌐 Apache and NGINX
• 🔧 Git and GitHub
• ☁️ Cloud deployment basics
• 🐳 Docker fundamentals
• 📊 System monitoring

💡 Practice Linux every day and build your command-line skills.

linux-project/
│
├── README.md
├── commands/
│   ├── basic.sh
│   ├── files.sh
│   ├── users.sh
│   └── network.sh
│
├── scripts/
│   ├── backup.sh
│   ├── monitoring.sh
│   └── cleanup.sh
│
├── nginx/
│   └── nginx.conf
│
├── apache/
│   └── apache.conf
│
├── networking/
│   ├── ip-config.sh
│   └── ssh-config.sh
│
└── docs/
    └── linux-notes.md

git clone https://github.com/your-username/linux-project.git

cd linux-project

ls -la

cat /etc/os-release

pwd
ls
ls -la
cd /var
mkdir test
rmdir test

touch example.txt
cat example.txt
cp example.txt backup.txt
mv backup.txt document.txt
rm document.txt

find / -name "*.conf"
grep "root" /etc/passwd
which bash
whereis nginx

Create a user:

sudo useradd linuxuser

Set password:

sudo passwd linuxuser

Create a group:

sudo groupadd developers

Add user to group:

sudo usermod -aG developers linuxuser

Check current user:

whoami

Check permissions:

ls -l

Change permissions:

chmod 755 script.sh

Change ownership:

sudo chown user:user example.txt

Example permission:

-rwxr-xr-x

Meaning:

Owner  = rwx
Group  = r-x
Others = r-x

Check IP address:

ip addr

Check routing:

ip route

Test connectivity:

ping 8.8.8.8

Check DNS:

nslookup google.com

Check listening ports:

ss -tulpn

Install SSH server on Ubuntu:

sudo apt update
sudo apt install openssh-server

Start SSH:

sudo systemctl enable --now ssh

Connect to another Linux system:

ssh username@192.168.1.100

sudo apt update
sudo apt upgrade
sudo apt install nginx

Remove package:

sudo apt remove nginx

sudo dnf update
sudo dnf install nginx

Check system status:

systemctl status

Start a service:

sudo systemctl start nginx

Stop a service:

sudo systemctl stop nginx

Enable service at boot:

sudo systemctl enable nginx

Show processes:

ps aux

Interactive monitoring:

top

Better monitoring:

htop

Find process:

pgrep nginx

Check disk usage:

df -h

Check directory size:

du -sh /var/log

List disks:

lsblk

Check mounted filesystems:

mount

Install NGINX:

sudo apt update
sudo apt install nginx

Check status:

sudo systemctl status nginx

Open browser:

http://SERVER-IP

Test configuration:

sudo nginx -t

Restart NGINX:

sudo systemctl restart nginx

Create a script:

nano system-info.sh

Add:

#!/bin/bash

echo "=========================="
echo " Linux System Information "
echo "=========================="

echo "Hostname: $(hostname)"
echo "User: $(whoami)"
echo "Kernel: $(uname -r)"
echo "Uptime: $(uptime -p)"
echo "Date: $(date)"

Make executable:

chmod +x system-info.sh

Run:

./system-info.sh

Configure Git:

git config --global user.name "Your Name"
git config --global user.email "you@example.com"

Initialize repository:

git init

Check status:

git status

Add files:

git add .

Commit:

git commit -m "Initial Linux project"

Push:

git push origin main

This project can be extended to:

• ☁️ AWS EC2
• ☁️ AWS S3
• ☁️ AWS RDS
• 🐳 Docker
• ☸️ Kubernetes
• 🔄 CI/CD
• 🔧 Jenkins
• 🌐 NGINX
• 🔐 SSH
• 📊 Prometheus
• 📈 Grafana

Try completing these exercises:

1. Create a Linux user.
2. Create a new group.
3. Configure file permissions.
4. Find large files.
5. Check running processes.
6. Configure SSH.
7. Install NGINX.
8. Host an HTML page.
9. Create a Bash script.
10. Configure Git.
11. Create a GitHub repository.
12. Push Linux scripts to GitHub.
13. Monitor CPU and memory.
14. Check disk usage.
15. Configure a basic firewall.

Linux Basics
     ↓
File System
     ↓
Users & Permissions
     ↓
Networking
     ↓
SSH
     ↓
Bash Scripting
     ↓
Web Server
     ↓
Git & GitHub
     ↓
Docker
     ↓
Cloud
     ↓
DevOps

By completing this project, you should be able to:

• Understand Linux architecture.
• Work confidently in the terminal.
• Manage files and directories.
• Create and manage users.
• Configure permissions.
• Troubleshoot basic networking.
• Manage Linux services.
• Write Bash scripts.
• Configure SSH.
• Deploy a basic web server.
• Use Git and GitHub.
• Understand basic DevOps workflows.

Contributions are welcome!

git fork
git clone <repository-url>
git checkout -b feature/new-feature
git add .
git commit -m "Add new feature"
git push origin feature/new-feature

Then create a Pull Request.

Always test commands carefully, especially commands involving:

rm
fdisk
parted
mkfs
dd
chmod
chown
systemctl

Some commands can permanently modify files, disks, or system configuration.

⭐ Star this repository ⭐

🐧 Keep Learning Linux • Keep Practicing • Keep Building 🚀

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