Intermediate Linux Course | TryHackMe Linux Strength Training

The post provides an in-depth walkthrough of a TryHackMe room focused on Linux Strength Training, targeting beginner to intermediate users.

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Introduction

The room focuses on improving Linux command-line skills, specifically:

• File searching with find.
• Grepping content.
• Working with encryption, decryption, and hashing.
• Exploring SQL databases.

Target Audience: Users familiar with Linux Fundamentals who want to transition to intermediate concepts.

Tasks and Key Concepts

1. File Searching Using the find Command

• Command Breakdown:
• Search files in a directory: find /path -type f.
• Search based on user: find /path -user username.
• Search files of specific size: find /path -size 52k.

Practical Demonstrations:

• Locate a file named readme_if_stuck.txt

find /home/dobson -type f -name "readme_if_stuck.txt"

Search for files modified on a specific date:

find /path -type f -newermt "2016-09-11" ! -newermt "2016-09-13"

Use quotes for file names with spaces.

Escape spaces in directories using backslashes (\).

2. Reading and Searching File Content

• Using less:
• View large files in chunks.
• Search for keywords within the file using /keyword.

Example:

• Search for the word “keyword” in a file:bashCopy code

less filename
/keyword

3. Moving and Renaming Files

• Command for Moving Files:

mv /source/* /destination/

Renaming Files or Folders:

• Standard renaming:

mv old_name new_name

Handling special characters (e.g., names starting with -):

mv -- -old_name new_name

4. Transferring Files Using scp

• Transfer a file to a remote machine using SSH:

scp /path/to/file username@ip_address:/destination_path

Examples and Scenarios

Find files owned by a specific user and of a particular size:

Example: find /home/francis -type f -user francis -size 52k.

Search for specific text in logs:

grep -irl "keyword" /home/dobson/chat_logs/

Working with modified files:

• Locate files modified between two dates:

find /home/workflows -type f -newermt "2016-09-11" ! -newermt "2016-09-13"

General Takeaways

• Command Mastery:
• The room is ideal for honing skills in navigating and manipulating Linux systems.
• Includes practical examples and hands-on tasks for real-world scenarios.

Practical Application:

• Tools like find, grep, and scp are indispensable for file management and system administration.

Next Steps:

• Dive deeper into topics like encryption, decryption, and working with SQL databases in subsequent tasks.

TryHackMe Linux Strength Training | Room Answers

Room answers can be found here.

Video Walkthrough