2125
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😈 Small Course Collection 😈
🎭 Blockchain Developer Nanodegree Program 🎭
🗃️ Link - https://www.mediafire.com/file/upmog2ko9z2pm0k/%2540H4CKT3R_bot-Udacity_-Blockchain_Developer_Nanodegree_Program.rar/file
🔋 Size - 2.21 GB
🎭 Data Structures and Algorithms Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/ce9x2g4hlwcngpc/%2540H4CKT3R_bot-Udacity-Data_Structures_and_Algorithms_Nanodegree.rar/file
🔋 Size - 2.15 GB
🎭 AI Programming with Python Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/12cg7ibg9xf3u1b/%2540H4CKT3R_bot-Udacity-AI_Programming_with_Python_Nanodegree.rar/file
🔋 Size - 1.96 GB
🎭 Programming for Data Science Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/yxk04osy9h1ikh9/%2540H4CKT3R_bot-Udacity-Programming_for_Data_Science_Nanodegree.rar/file
🔋 Size - 2.21 GB
🎭 Front-End Web Developer Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/bh82z9szh5v3mkt/%2540H4CKT3R_bot-Udacity-Front-End_Web_Developer_Nanodegree.rar/file
🔋 Size - 9.68 GB
🎭 Natural Language Processing Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/aaqfwptld0kcyhr/%2540H4CKT3R_bot-Udacity-Natural_Language_Processing_Nanodegree.rar/file
🔋 Size - 1.78 GB
🎭 Computer Vision Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/jsxbsgid766rn1v/%2540H4CKT3R_bot-Udacity-Computer_Vision_Nanodegree.rar/file
🔋 Size - 2.66 GB
🎭 Deep Reinforcement Learning Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/3vlcf3xiyrk1exz/%2540H4CKT3R_bot-Udacity-Deep_Reinforcement_Learning_Nanodegree.rar/file
🔋 Size - 2.30 GB
🎭 Become a Professional React Developer Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/x7dxlp339mmjvvd/%2540H4CKT3R_bot-Udacity-Become_a_Professional_React_Developer_Nanodegree.rar/file
🔋 Size - 3.65 GB
🎭 Java Developer Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/sw5q0ettgrwfovu/%2540H4CKT3R_bot-Udacity-Java_Developer_Nanodegree.rar/file
🔋 Size - 3.26 GB
🎭 Android Basics Nanodegree by Google 🎭
🗃️ Link - https://www.mediafire.com/file/juy3f6as0l7s7lb/%2540H4CKT3R_bot-Udacity-Android_Basics_Nanodegree_by_Google.rar/file
🔋 Size - 8.95 GB
🎭 Robotics Software Engineer Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/hedptw1v3oix0na/%2540H4CKT3R_bot-Udacity-Robotics_Software_Engineer_Nanodegree.rar/file
🔋 Size - 4.93 GB
🎭 Digital Marketing Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/sjalkf2qcjshnsq/%2540H4CKT3R_bot-Udacity-Digital_Marketing_Nanodegree.rar/file
🔋 Size - 4.09 GB
🎭 Intro to Self-Driving Cars Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/2qla9nj9y8v596q/%2540H4CKT3R_bot-Udacity-_Intro_to_Self-Driving_Cars_Nanodegree.rar/file
🔋 Size - 3.35 GB
🎭 Machine Learning Engineer Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/7x0u3pe25vcpq48/%2540H4CKT3R_bot-Udacity-Machine_Learning_Engineer_Nanodegree.rar/file
🔋 Size - 5.37 GB
🎭 Android Developer Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/1xjj72a4851xyg8/%2540H4CKT3R_bot-Udacity-Android_Developer_Nanodegree.rar/file
🔋 Size - 6.24 GB
🎭 Data Scientist Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/upyxbzfejoevgsg/%2540H4CKT3R_bot-Udacity-Data_Scientist_Nanodegree.rar/file
🔋 Size - 7.80 GB
🎭 Intro to Programming Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/v3fg7zrqkpnkh4g/%2540H4CKT3R_bot-Udacity-Intro_to_Programming_Nanodegree_v3.rar/file
🔋 Size - 6.14 GB
🎭 Self Driving Car Engineer Nanodegree 🎭
🗃️ Link - https://www.mediafire.com/file/hscwk64oyix7ts1/%2540H4CKT3R_bot-Udacity-_Self_Driving_Car_Engineer_Nanodegree.rar/file
🔋 Size - 7.17 GB
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2024 ICT Networking සහේත්‍රා-දොම්පේ
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Security: Gain awareness of essential Linux security practices, including user management, permissions, firewalls, and system updates. Understand the importance of keeping your Linux system secure.
Linux security practices are vital for protecting your system from unauthorized access, vulnerabilities, and potential threats. Here are some essential Linux security practices to help you maintain a secure environment:
1. User Management:
- Use strong passwords: Encourage users to use complex passwords that include a combination of uppercase and lowercase letters, numbers, and special characters. Consider implementing password policies or tools to enforce password strength.
- Limit user privileges: Assign users the minimum necessary privileges to perform their tasks. Regularly review and revoke unnecessary privileges.
- Disable or remove unused accounts: Remove or disable any user accounts that are no longer needed to reduce the potential attack surface.
- Implement multi-factor authentication (MFA): Enable MFA for user authentication, which adds an extra layer of security by requiring additional verification beyond a password.
2. File Permissions and Ownership:
- Set appropriate file permissions: Configure file and directory permissions to restrict access based on the principle of least privilege. Use chmod to set permissions (e.g., read, write, execute) for the owner, group, and others.
- Manage file ownership: Ensure that files and directories are owned by the appropriate users and groups using the chown command. Restrict access to sensitive files by limiting ownership and permissions.
3. Firewall Configuration:
- Configure a firewall: Use tools like iptables or firewalld to set up a firewall and define rules that control inbound and outbound network traffic. Restrict access to necessary services and ports, and regularly review and update firewall rules.
4. Regular System Updates:
- Keep the system up to date: Install security patches and updates regularly to address vulnerabilities and bugs. Use the package manager (apt, yum, etc.) to update the system and its installed packages.
5. Security Auditing and Monitoring:
- Monitor system logs: Regularly review system logs located in /var/log for any suspicious activities or error messages that could indicate security breaches or issues.
- Implement intrusion detection systems (IDS) or intrusion prevention systems (IPS) to monitor and alert you of potential security threats.
- Use security auditing tools like lynis or OpenSCAP to scan the system for vulnerabilities and compliance with security best practices.
6. Security Awareness:
- Educate users: Promote security awareness among users and provide training on best practices such as avoiding phishing emails, practicing safe browsing habits, and being cautious with file downloads.
- Stay informed: Keep up to date with Linux security news, vulnerabilities, and security advisories relevant to your distribution. Subscribe to security mailing lists or follow reputable sources for timely information.
Maintaining a secure Linux system requires ongoing effort and vigilance. Regularly review and update security practices to adapt to evolving threats and new vulnerabilities. Consult official documentation, security resources, and community forums to stay informed about the latest security recommendations for your specific Linux distribution.
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Networking: Understand basic networking concepts in Linux, including IP addressing, network configuration, and troubleshooting network connectivity issues. Learn how to use tools like ifconfig, ping, and netstat.
Networking is a fundamental aspect of Linux system administration. Understanding basic networking concepts and utilizing essential tools can help you configure and troubleshoot network connectivity. Here are some key networking topics and tools in Linux:
1. IP Addressing:
- IP address: An IP address uniquely identifies a device on a network. Learn about IPv4 and IPv6 addressing schemes and how to assign static or dynamic IP addresses to your Linux system.
- Subnetting: Understand subnetting to divide a network into smaller subnetworks.
2. Network Configuration:
- ifconfig: The ifconfig command displays and configures network interfaces, including assigning IP addresses, enabling or disabling interfaces, and modifying network settings.
- ip command: In recent Linux distributions, the ip command is replacing ifconfig. It provides more advanced functionalities for managing network interfaces, routing, and other network-related tasks.
3. Network Connectivity:
- ping: The ping command is used to check network connectivity between your Linux system and another device by sending ICMP echo request packets.
- traceroute: The traceroute command traces the path packets take from your system to a destination host, showing the IP addresses and response times of intermediate hops.
- netstat: The netstat command displays active network connections, listening ports, routing tables, and various network statistics.
4. DNS (Domain Name System):
- DNS resolution: Understand how DNS works and how Linux systems resolve domain names to IP addresses. Learn how to configure DNS servers and troubleshoot DNS-related issues.
- nslookup and dig: The nslookup and dig commands are used to query DNS servers and retrieve information about domain names, IP addresses, and DNS records.
5. Firewall and Security:
- iptables: The iptables command is a powerful tool for configuring firewall rules to filter network traffic, control access, and enhance system security.
- firewalld: In modern Linux distributions, firewalld is often used as a frontend for managing firewall rules. It provides a more user-friendly and dynamic interface.
6. Network File Sharing:
- NFS (Network File System): Learn how to configure NFS to share files and directories across a network.
- Samba: Explore Samba to enable file and printer sharing between Linux and Windows systems.
7. Network Troubleshooting:
- tcpdump: The tcpdump command captures and analyzes network packets, helping diagnose network issues and investigate network traffic.
- Wireshark: Wireshark is a graphical packet analyzer that allows you to capture, inspect, and analyze network packets in real-time.
Mastering networking concepts and tools takes practice and hands-on experience. Additionally, online resources, Linux networking tutorials, and forums dedicated to networking topics can provide further guidance and practical examples to deepen your understanding of Linux networking.
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Package Management: Explore package management systems like APT (Advanced Package Tool) or YUM (Yellowdog Updater, Modified) to install, update, and remove software packages. Understand how to use package repositories and package managers to manage software on your Linux system.
Package management is a critical aspect of managing a Linux system, allowing you to install, update, and remove software packages efficiently. Two common package management systems are APT (Advanced Package Tool) and YUM (Yellowdog Updater, Modified). Here are some basic concepts to understand about package management in Linux:
1. Package Repositories: Package repositories are collections of software packages available for download and installation. Repositories can be official, maintained by the Linux distribution vendor, or third-party, maintained by individuals or organizations.
2. Package Managers: Package managers are tools used to install, update, and remove software packages on a Linux system. They are responsible for resolving dependencies and ensuring that the software is installed correctly.
3. APT (Advanced Package Tool): APT is a command-line package manager used primarily in Debian-based distributions such as Ubuntu. APT uses package repositories to download and install software packages, and it can handle dependencies and conflicts between packages.
4. YUM (Yellowdog Updater, Modified): YUM is a command-line package manager used primarily in Red Hat-based distributions such as Fedora and CentOS. YUM uses package repositories to download and install software packages, and it can handle dependencies and conflicts between packages.
Here are some basic commands for using APT and YUM:
APT commands:
• 'sudo apt update': Updates the local package repository database to ensure that the latest packages are available.
• 'sudo apt install package': Installs the specified package and its dependencies.
• 'sudo apt upgrade': Upgrades all installed packages to the latest versions.
• 'sudo apt remove package': Removes the specified package and its dependencies.
• 'sudo apt search keyword': Searches the package repository for packages that match the specified keyword.
YUM commands:
• 'sudo yum update': Updates all installed packages to the latest versions.
• 'sudo yum install package': Installs the specified package and its dependencies.
• 'sudo yum upgrade': Upgrades all installed packages to the latest versions.
• 'sudo yum remove package': Removes the specified package and its dependencies.
• 'sudo yum search keyword': Searches the package repository for packages that match the specified keyword.
It's essential to use package managers with caution and ensure that you download packages from trusted repositories to avoid security risks. Also, remember to update your system regularly to ensure that you have the latest security patches and bug fixes.
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🌿SQL Injection Attack :: Explain in (සිංහල)🧑💻✍
හැඳින්වීම :
අද අපි කතා කරන්න හිතුවේ SQL Injections ගැන. ඉතින් SQL Injections ගැන කතා කරන්න කලින් අපි දැනගන්න ඕනී මේ SQL කියන්නේ මොකක්ද කියන එක ගැන.
Structured Query Language එහෙමත් නැත්තම් SQL කියලා කියන්නේ Data Base වල Backend එකේ Data Manage කරන්න පුලුවන් Language එකක්. ඔයාලා දන්නවා ඇති Data Base එකක Data සාමාන්‍යෙන් Store වෙන්නේ Tables වල කියලා. ඉතින් මේ Store වෙන Data Manage කරන්නත්, මේ Tables Manage කරන්නත් SQL භාවිතා වෙනවා. එහෙනම් දැන් අපි වැඩේට බහිමු (1) SQL Injection එකක් කියන්නේ මොකක්ද?
(2) SQL Injection Types මොනවද?
(3) කොහොමද මේ SQLI වැඩ කරන්නේ?
(4) Hackers ලා ඇයි SQL Injection භාවිතා කරන්නේ?
(5) SQL Injection Attack වලින් ආරක්ශා වෙන්නේ කොහොමද?
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🌿Packets Storm Attack:Explain in (සිංහල)🧑💻✍
Cyber Warfare එක තුළ මේ Packets Storm Attack කියන එක විනාශකාරීම බලවේගයක් වෙලා තියෙනවා.ඉතින් මේ Article එකෙන් කතා කරමු Packets Storm Attack ගැන.1) මොකක්ද මේ Packets Storm Attack කියලා කියන්නේ.
2) Packets Storm Attack වැඩ කරන්නේ කොහොමද ?
3) ඇයි Hackers ලා Packets Storm Attack use කරන්නේ
4) Packets Storm Attack ගැන Real-World Examples
5) කොහොමද මේවායෙන් ආරක්ශා වෙන්නේ
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🌙🌿 Please react & comment to post "/
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System Monitoring and Maintenance: Explore tools and techniques for monitoring system performance, managing processes, and troubleshooting common issues in Linux. Learn about log files, system resource monitoring, and package updates.
System monitoring and maintenance are essential tasks for keeping a Linux system running smoothly. Here are some tools and techniques to help you monitor system performance, manage processes, and troubleshoot common issues in Linux:
1. Resource Monitoring:
- top: The top command displays real-time information about system resource usage, including CPU, memory, and processes. It allows you to monitor and manage running processes.
- htop: Similar to top, htop provides an interactive and enhanced view of system resources and processes, with options for sorting, searching, and filtering.
- vmstat: The vmstat command reports virtual memory statistics, providing insights into system memory, swap, and CPU usage.
2. Log Files:
- /var/log: Linux systems store log files in the /var/log directory. Common log files include /var/log/syslog, /var/log/messages, and /var/log/auth.log. Monitoring log files helps identify errors, warnings, and system events.
- tail: The tail command allows you to view the last few lines of a log file, providing a real-time update of log activity. For example, tail -f /var/log/syslog continuously displays new log entries as they are added.
3. Process Management:
- ps: The ps command displays information about running processes, including their process IDs (PIDs), resource usage, and parent-child relationships. For example, ps aux lists all running processes.
- kill: The kill command terminates a process using its PID. For example, kill PID terminates the process with the specified PID. The killall command allows you to kill processes by name.
4. Package Updates:
- Package Managers: Use the package management tools discussed earlier (APT or YUM) to update software packages. For example, sudo apt update && sudo apt upgrade updates all packages on an Ubuntu system.
- Unattended Upgrades: Configure the system to automatically install security updates using tools like unattended-upgrades (Debian-based) or yum-cron (Red Hat-based). This ensures that critical security patches are applied automatically.
5. Performance Monitoring Tools:
- sar: The sar command collects and reports system performance data, including CPU, memory, disk I/O, and network usage. It helps identify performance bottlenecks and historical trends.
- iostat: The iostat command provides input/output statistics for devices and partitions, helping identify disk I/O performance issues.
- nmon: The nmon command provides a comprehensive view of system resources, including CPU, memory, disk, network, and file system utilization. It displays real-time and historical data in a user-friendly format.
Regularly monitoring system performance, managing processes, and staying up to date with package updates are essential for maintaining a stable and secure Linux system. Explore additional monitoring tools and techniques based on your specific requirements and system setup.
Remember to consult the relevant man pages, distribution documentation, or online resources for detailed usage instructions and options specific to the tools mentioned above.
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Shell Scripting: Get started with shell scripting using bash (Bourne Again Shell) or another shell. Learn how to write simple scripts to automate tasks and perform repetitive actions.
Shell scripting is a powerful way to automate tasks and perform repetitive actions in Linux. The Bash shell (Bourne Again Shell) is one of the most common shells used in Linux systems. Here are some basics to help you get started with shell scripting:
1. Script Creation:
- Choose a text editor: Use a text editor such as nano, vim, or gedit to create and edit your shell scripts. For example, nano script.sh.
- Set the script's interpreter: Begin your script with a shebang line that specifies the interpreter. For Bash scripts, use #!/bin/bash.
2. Variables:
- Variable assignment: Assign values to variables using the syntax variable_name=value. For example, name="John".
- Variable usage: Access variable values using the $ prefix. For example, echo "Hello, $name!".
3. Comments:
- Add comments: Use the # symbol to add comments in your script. Comments are ignored by the interpreter but provide explanations for human readers.
4. Command Execution:
- Run commands: Execute commands within your script using backticks (\`) or the $() syntax. For example, output=`ls -l" or output=$(ls -l).
5. Control Structures:
- If statements: Use conditional statements (if, elif, else) to perform different actions based on specific conditions. For example:
bash- Loops: Utilize loops (
if [ $age -ge 18 ]; then
echo "You are an adult."
else
echo "You are a minor."
fi
for, while) to repeat actions. For example:bash6. Input and Output:
for i in 1 2 3; do
echo $i
done
read command to accept user input and assign it to variables. For example, read -p "Enter your name: " name.echo command to display output on the terminal. For example, echo "Hello, World!".cat, grep, sed, and awk to read and manipulate files within your script.chmod command to make your script executable. For example, chmod +x script.sh../script.sh or bash script.sh.
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Web site එකක් තියෙනවා ඒකෙ input එකක් ඉල්ලනවා ඒක පුරවලා generate එබුවහම photos දෙකක් එනවා, මට ඒ දෙක download කරගන්න ඕනි. (web scrapping)
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User and group management in Linux is crucial for controlling access, ensuring security, and managing resources effectively. Here are some key concepts and commands related to user and group management:
1. User Accounts:
• Creating a user account: Use the `useradd` or `adduser` command to create a new user account. For example, `sudo useradd username`.
• Modifying user account details: The `usermod` command allows you to modify user account details such as the username, home directory, or default shell. For example, `sudo usermod -d /newhome username`.
• Deleting a user account: To remove a user account, use the `userdel` command. For example, `sudo userdel username`.
2. User Groups:
• Creating a group: Use the `groupadd` command to create a new group. For example, `sudo groupadd groupname`.
• Modifying group details: The `groupmod` command allows you to modify group details such as the group name. For example, `sudo groupmod -n newgroupname oldgroupname`.
• Deleting a group: To remove a group, use the `groupdel` command. For example, `sudo groupdel groupname`.
3. User Permissions and Ownership:
• File ownership: Use the `chown` command to change the ownership of a file or directory. For example, `sudo chown username:groupname file.txt` changes the ownership to a specific user and group.
• File permissions: The `chmod` command is used to modify file permissions. You can assign read (r), write (w), and execute (x) permissions for the owner, group, and others. For example, `chmod u+rw file.txt` grants read and write permissions to the owner.
4. Access Control:
• The `sudo` command: Allows authorized users to execute commands with administrative privileges.
• File permissions: Linux uses a permission system with three levels: user (owner), group, and others. You can set permissions using numeric mode (e.g., `chmod 644 file.txt`) or symbolic mode (e.g., `chmod u=rw,g=r,o=r file.txt`).
It's important to note that managing users and groups often requires administrative privileges, so prefixing commands with `sudo` is common.
Understanding user permissions and access control is essential for maintaining the security and integrity of your system. Regularly reviewing and managing user accounts, groups, and file permissions helps ensure that access is granted appropriately and sensitive data is protected.
It's recommended to consult the Linux distribution's documentation or specific man pages (e.g., `man useradd`, `man chown`) for detailed information on the commands and options available on your system.
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Command-Line Interface (CLI): Gain an understanding of the Linux command-line interface and how to use essential commands like cd, ls, mkdir, cp, mv, rm, and grep. Learn about command syntax, options, and arguments.
The Command-Line Interface (CLI) in Linux provides a text-based way to interact with the operating system. It allows you to execute commands, manage files and directories, configure system settings, and perform various tasks. Here are some essential commands and concepts to understand in the Linux CLI:
1. cd: Change Directory
Usage: cd [directory]
Example: cd /home/user
Description: Used to change the current working directory.
2. ls: List Files and Directories
Usage: ls [options] [path]
Example: ls -l /home
Description: Lists files and directories in the specified path.
3. mkdir: Make Directory
Usage: mkdir [options] directory_name
Example: mkdir new_directory
Description: Creates a new directory with the specified name.
4. cp: Copy Files and Directories
Usage: cp [options] source_file destination
Example: cp file.txt /home/user
Description: Copies files and directories from the source to the destination.
5. mv: Move/Rename Files and Directories
Usage: mv [options] source destination
Example: mv file.txt /home/user
Description: Moves or renames files and directories.
6. rm: Remove Files and Directories
Usage: rm [options] file
Example: rm file.txt
Description: Deletes files and directories.
Caution: Be careful when using rm as it permanently deletes files without confirmation.
7. grep: Search Text within Files
Usage: grep [options] pattern [file]
Example: grep "keyword" file.txt
Description: Searches for a specific pattern or keyword within a file or multiple files.
Understanding the syntax, options, and arguments of commands is crucial. Here are some common elements:
• Options: Often preceded by a dash (-), options modify the behavior of commands. They provide additional functionalities or change how a command operates. For example, -l in ls -l shows detailed file information.
• Arguments: These are the parameters passed to a command. They can be file or directory names, text strings, or other values required by the command. For example, in cp file.txt /home/user, file.txt is the source and /home/user is the destination.
• Wildcards: Special characters such as * and ? can be used as wildcards in commands to represent multiple characters or any single character, respectively. For example, ls *.txt lists all files with a .txt extension.
• Command Help: To get detailed information about a command, you can use the --help option or refer to the command's manual page. For example, ls --help provides information about the ls command.
Remember to use commands with caution, especially when dealing with system-critical files and directories. Always double-check your commands before execution, as they can have significant consequences.
Practicing and exploring these essential commands will help you navigate and accomplish various tasks in the Linux CLI efficiently.
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