Adds text.txt file

.bashrc

@@ -0,0 +1,24 @@
+# ~/.bashrc
+
+# Enable colorful ls and grep output
+export CLICOLOR=1
+export LS_COLORS='di=34:fi=0:ln=35:pi=33:so=32:bd=46:cd=43:ex=31'
+
+# Helpful aliases
+alias ll='ls -alF'
+alias la='ls -A'
+alias ..='cd ..'
+alias cls='clear'
+
+# Enable color for grep
+alias grep='grep --color=auto'
+
+# Make prompt user-friendly
+PS1='\[\e[32m\]\u@\h\[\e[m\]:\[\e[34m\]\w\[\e[m\]\$ '
+
+# Only add to PATH if it isn't already there
+if [[ ":$PATH:" != *":$(pwd)/bin:"* ]]; then
+    export PATH="$PATH:$(pwd)/bin"
+fi
+
+./bin/repo.sh

.vscode/settings.json

@@ -1,24 +1,26 @@
 {
-    "editor.bracketPairColorization.enabled": true,
-    "editor.cursorBlinking": "solid",
-    "editor.fontFamily": "ui-monospace, Menlo, Monaco, 'Cascadia Mono', 'Segoe UI Mono', 'Roboto Mono', 'Oxygen Mono', 'Ubuntu Monospace', 'Source Code Pro', 'Fira Mono', 'Droid Sans Mono', 'Courier New', monospace",
-    "editor.fontLigatures": false,
-    "editor.fontSize": 22,
-    "editor.formatOnPaste": true,
-    "editor.formatOnSave": true,
-    "editor.lineNumbers": "on",
-    "editor.matchBrackets": "always",
-    "editor.minimap.enabled": false,
-    "editor.smoothScrolling": true,
-    "editor.tabSize": 2,
-    "editor.useTabStops": true,
-    "emmet.triggerExpansionOnTab": true,
-    "explorer.openEditors.visible": 0,
-    "files.autoSave": "afterDelay",
-    "screencastMode.onlyKeyboardShortcuts": true,
-    "terminal.integrated.fontSize": 18,
-    "workbench.activityBar.visible": true,
-    "workbench.colorTheme": "Visual Studio Dark",
-    "workbench.fontAliasing": "antialiased",
-    "workbench.statusBar.visible": true
-  }
+  "editor.bracketPairColorization.enabled": true,
+  "editor.cursorBlinking": "solid",
+  "editor.fontFamily": "ui-monospace, Menlo, Monaco, 'Cascadia Mono', 'Segoe UI Mono', 'Roboto Mono', 'Oxygen Mono', 'Ubuntu Monospace', 'Source Code Pro', 'Fira Mono', 'Droid Sans Mono', 'Courier New', monospace",
+  "editor.fontLigatures": false,
+  "editor.fontSize": 22,
+  "editor.formatOnPaste": true,
+  "editor.formatOnSave": true,
+  "editor.lineNumbers": "on",
+  "editor.matchBrackets": "always",
+  "editor.minimap.enabled": false,
+  "editor.smoothScrolling": true,
+  "editor.tabSize": 2,
+  "editor.useTabStops": true,
+  "emmet.triggerExpansionOnTab": true,
+  "explorer.openEditors.visible": 0,
+  "files.autoSave": "afterDelay",
+  "screencastMode.onlyKeyboardShortcuts": true,
+  "terminal.integrated.fontSize": 18,
+  "workbench.colorTheme": "Visual Studio Dark",
+  "workbench.fontAliasing": "antialiased",
+  "workbench.statusBar.visible": true,
+  "githubPullRequests.ignoredPullRequestBranches": [
+    "main"
+  ]
+}

bin/clean_temp.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+TARGET="/home/user/downloads"
+
+find $TARGET -type f -name "*.tmp" -delete
+
+echo "Temporary files removed!"

bin/create_user.sh

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+
+#!/bin/bash
+
+# ----------------------------------------------------------------------
+# Codespaces User Creation Script
+# Usage: ./create_user.sh <username> <group> <password>
+#
+# This script creates a new user, adds them to the specified groups (sudo, adm, <group>),
+# and sets a non-interactive password. It uses a temporary directory for the home
+# path to avoid Codespaces permission issues.
+# ----------------------------------------------------------------------
+
+# --- 1. Argument Validation ---
+if [ "$#" -ne 3 ]; then
+    echo "Usage: $0 <username> <group> <password>"
+    echo "Example: $0 kirk trek abc123"
+    exit 1
+fi
+
+USERNAME=$1
+EXTRA_GROUP=$2
+PASSWORD=$3
+USER_GROUPS="sudo,adm,${EXTRA_GROUP}"   # Dynamically include the passed-in group
+HOME_DIR="/tmp/${USERNAME}_home"   # Codespaces workaround for home directory
+
+# --- 1b. Validate extra group exists ---
+if ! getent group "${EXTRA_GROUP}" > /dev/null; then
+    echo "🛑 Error: Group '${EXTRA_GROUP}' does not exist."
+    echo "Create it with: sudo groupadd ${EXTRA_GROUP}"
+    exit 5
+fi
+
+echo "Starting user creation script for user: ${USERNAME}"
+
+# --- 2. Check if User Exists ---
+# 'id -u' returns 0 if the user exists, and non-zero (1) if they don't.
+if id -u "${USERNAME}" &> /dev/null; then
+    echo "🛑 User '${USERNAME}' already exists. Exiting."
+    exit 2
+fi
+
+# --- 3. User Creation ---
+
+# Create the user:
+# -m: Create the home directory (in /tmp/...)
+# -d: Specify the custom home directory (the Codespaces workaround)
+# -G: Specify secondary groups (sudo, adm, <group>)
+# -s: Specify the login shell (/bin/bash)
+# Note: Using 'sudo' is mandatory for these administrative commands.
+
+echo "1. Creating user '${USERNAME}' with home directory at ${HOME_DIR}..."
+sudo useradd \
+    -m \
+    -d "${HOME_DIR}" \
+    -G "${USER_GROUPS}" \
+    -s /bin/bash \
+    "${USERNAME}"
+
+if [ $? -ne 0 ]; then
+    echo "🛑 Error: Failed to create user. Check sudo permissions."
+    exit 3
+fi
+
+# --- 4. Password Setting (Non-Interactive) ---
+
+# Use chpasswd to set the password without prompting.
+echo "2. Setting non-interactive password..."
+echo "${USERNAME}:${PASSWORD}" | sudo chpasswd
+
+if [ $? -ne 0 ]; then
+    echo "🛑 Error: Failed to set password. Check chpasswd command."
+    # Clean up the user if password fails
+    sudo userdel -r "${USERNAME}" &> /dev/null
+    exit 4
+fi
+
+# --- 5. Confirmation ---
+
+echo ""
+echo "✅ SUCCESS: User '${USERNAME}' created and configured."
+echo "   - Groups: ${USER_GROUPS}"
+echo "   - Home: ${HOME_DIR}"
+echo ""
+echo "Try logging in: su - ${USERNAME}"

bin/find_users.sh

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+#!/bin/bash
+
+# ----------------------------------------------------------------------
+# Pattern Matching Lab Setup Script
+# Usage: sudo ./find_users.sh <user1,user2,...> <group_name>
+#
+# Creates users, assigns them to groups, and injects random security issues
+# to be found by the 'grep' and 'find' commands.
+# ----------------------------------------------------------------------
+
+# --- Configuration ---
+# The string we'll search for with grep
+SUSPECT_KEYWORD="[UNAUTHORIZED_MODIFICATION_ALERT_X9]"
+# The permission we'll search for with find
+VULNERABLE_PERM="777"
+DEFAULT_PERM="755"
+DEFAULT_PASSWORD="abc123"
+
+
+# --- 1. Input Validation ---
+if [ "$#" -ne 2 ]; then
+    echo "Error: Two arguments are required."
+    echo "Usage: sudo $0 <user1,user2,...> <group_name>"
+    echo "Example: sudo $0 kirk,spock,uhura trek"
+    exit 1
+fi
+
+USER_CSV="$1"
+GROUP_NAME="$2"
+QUOTE_MESSAGE="I'm in the ${GROUP_NAME} group!"
+
+echo "--- Starting Setup for Group: ${GROUP_NAME} ---"
+
+# --- 2. Group Management (Silent Creation) ---
+# The -f (force) flag prevents an error if the group already exists.
+groupadd -f "${GROUP_NAME}" 2> /dev/null
+if [ $? -eq 0 ]; then
+    echo "Group '${GROUP_NAME}' checked/created successfully."
+fi
+
+# --- 3. User Creation and Injection Loop ---
+IFS=',' read -ra USERS_ARRAY <<< "$USER_CSV"
+CREATED_COUNT=0
+
+for USER in "${USERS_ARRAY[@]}"; do
+    echo "Processing user: ${USER}"
+
+    # A) Pre-creation Cleanup (User Deletion)
+    if id "${USER}" &> /dev/null; then
+        echo "  -> WARNING: User ${USER} already exists. Deleting user and home directory..."
+        userdel -r "${USER}" 2> /dev/null
+    fi
+
+    # B) User Creation
+    # -m: Create home directory
+    # -d /tmp/${USER}_home: Use a temporary path for Codespaces compatibility
+    # -G sudo,adm,${GROUP_NAME}: Add user to necessary groups
+    # -s /bin/bash: Set default shell
+    useradd -m -d "/tmp/${USER}_home" -G sudo,adm,"${GROUP_NAME}" -s /bin/bash "${USER}"
+
+    # C) Set Password (Non-interactive)
+    echo "${USER}:${DEFAULT_PASSWORD}" | chpasswd
+
+    # D) Home Directory Setup (quotes.txt)
+    USER_HOME="/tmp/${USER}_home"
+    QUOTE_FILE="${USER_HOME}/${USER}_quotes.txt"
+    echo "${QUOTE_MESSAGE}" > "$QUOTE_FILE"
+
+    # Ensure ownership is correct
+    chown "${USER}:${USER}" "$QUOTE_FILE"
+    chmod "${DEFAULT_PERM}" "$QUOTE_FILE"
+
+    echo "  -> Created user, set password, and created ${QUOTE_FILE}"
+
+    # E) Random Vulnerability Injection (60% chance for Grep)
+    # $RANDOM % 100 generates a number from 0 to 99.
+    if [ $(( RANDOM % 100 )) -lt 60 ]; then
+        echo "${SUSPECT_KEYWORD}" >> "$QUOTE_FILE"
+        echo "  -> VULNERABILITY INJECTED (Grep search target)."
+        grep_target_count=$((grep_target_count + 1))
+    fi
+
+    # F) Random Permission Setting (50% chance for Find)
+    if [ $(( RANDOM % 100 )) -lt 50 ]; then
+        chmod "${VULNERABLE_PERM}" "$QUOTE_FILE"
+        echo "  -> PERMISSION SET TO ${VULNERABLE_PERM} (Find search target)."
+        find_target_count=$((find_target_count + 1))
+    fi
+
+    CREATED_COUNT=$((CREATED_COUNT + 1))
+done
+
+# --- 4. Completion Summary ---
+echo "----------------------------------------------------"
+echo "Setup Complete for ${CREATED_COUNT} Users in Group ${GROUP_NAME}."
+echo "Login password for all users: ${DEFAULT_PASSWORD}"
+echo "Injected Keyword Search Targets: ${grep_target_count} files."
+echo "World-Writable Permission Targets: ${find_target_count} files."
+echo "----------------------------------------------------"
+echo "Let the search begin!"

bin/hal-9000.sh

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+#!/bin/bash
+# A simple script to demonstrate user input and variable use.
+echo "Hello. I'm Hal 9000. What is your name?"
+
+read USERNAME
+echo "I'm sorry $USERNAME, I'm afraid I can't open the pod bay doors."
+

bin/repo.sh

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+
+#!/bin/bash
+
+# Codespaces repo symlink script
+
+# ----------------------------------------------------------------------
+# 1. Define Variables
+# ----------------------------------------------------------------------
+
+# $PWD holds the current path, which should be the workspace root when
+# the user executes this script from the default terminal location.
+WORKSPACE_ROOT="$PWD"
+SYMLINK_PATH="$HOME/repo"
+
+echo "Starting Codespaces setup..."
+echo "----------------------------------------------------"
+
+# ----------------------------------------------------------------------
+# 2. Create Symlink (Shortcut)
+# ----------------------------------------------------------------------
+
+# Check if the symlink already exists to prevent an error
+if [ -L "$SYMLINK_PATH" ]; then
+    echo "Symlink '~/repo' already exists. Removing old link..."
+    rm "$SYMLINK_PATH"
+elif [ -d "$SYMLINK_PATH" ]; then
+    echo "Warning: A directory named 'repo' already exists in home. Skipping symlink creation."
+    exit 1
+fi
+
+# Create the new symlink
+echo "Creating symlink: ~/repo -> $WORKSPACE_ROOT"
+ln -s "$WORKSPACE_ROOT" "$SYMLINK_PATH"
+
+if [ $? -eq 0 ]; then
+    echo "SUCCESS: Symlink '~/repo' created."
+else
+    echo "ERROR: Failed to create symlink."
+fi
+
+echo "----------------------------------------------------"
+
+echo "Setup complete. You can now use 'cd ~/repo' from anywhere, or 'cd repo' once you are in the home directory (~)."
+