ALX System Engineering DevOps

This repository contains various projects and exercises related to System Engineering and DevOps concepts as part of the ALX curriculum. Each project focuses on different aspects of shell scripting, system administration, networking, web stack configuration, and API usage.

Table of Contents

• 0x00-shell_basics
• 0x01-shell_permissions
• 0x02-shell_redirections
• 0x03-shell_variables_expansions
• 0x04-loops_conditions_and_parsing
• 0x05-processes_and_signals
• 0x06-regular_expressions
• 0x07-networking_basics
• 0x08-networking_basics_2
• 0x09-web_infrastructure_design
• 0x0A-configuration_management
• 0x0B-ssh
• 0x0C-web_server
• 0x0F-load_balancer
• 0x10-https_ssl
• 0x11-what_happens_when_you_type_google_com_in_your_browser_and_press_enter
• 0x12-web_stack_debugging_2
• 0x13-firewall
• 0x14-mysql
• 0x15-api
• 0x16-api_advanced
• 0x17-web_stack_debugging_3
• 0x18-webstack_monitoring
• 0x1A-application_server

Project Descriptions

0x00-shell_basics

Basic shell scripting tasks that cover navigation, listing files, manipulating directories, and more.

• Key files: 0-current_working_directory, 1-listit, 10-back, 12-file_type, 14-copy_html

0x01-shell_permissions

Tasks related to managing file permissions, ownership, and user groups.

• Key files: 0-iam_betty, 3-new_owner, 8-James_Bond, 12-directory_permissions

0x02-shell_redirections

Covers standard input/output redirections and working with files using shell commands.

• Key files: 0-hello_world, 9-duplicate_last_line, 13-unique, 17-hidethisword

0x03-shell_variables_expansions

Explores shell variables, expansions, and arithmetic operations.

• Key files: 0-alias, 2-path, 9-divide_and_rule, 11-binary_to_decimal

0x04-loops_conditions_and_parsing

Introduces loops, conditionals, and file parsing in shell scripting.

• Key files: 1-for_best_school, 10-fizzbuzz, 102-lets_parse_apache_logs

0x05-processes_and_signals

Deals with process management, signals, and understanding process IDs in Linux.

• Key files: 0-what-is-my-pid, 4-to_infinity_and_beyond, 7-highlander

0x06-regular_expressions

Regular expression tasks using Ruby scripting to match patterns in text.

• Key files: 0-simply_match_school.rb, 3-repetition_token_2.rb, 6-phone_number.rb

0x07-networking_basics

Introduces networking fundamentals such as OSI model, MAC addresses, and TCP/UDP protocols.

• Key files: 0-OSI_model, 3-UDP_and_TCP, 5-is_the_host_on_the_network

0x08-networking_basics_2

Advanced networking topics including changing IP configurations.

• Key files: 0-change_your_home_IP

0x09-web_infrastructure_design

Focuses on designing web infrastructures including simple and distributed setups.

• Key files: 0-simple_web_stack, 1-distributed_web_infrastructure

0x0A-configuration_management

Puppet configuration management tasks that automate system setup and command execution.

• Key files: 0-create_a_file.pp, 2-execute_a_command.pp

0x0B-ssh

Tasks covering SSH key pair creation and configuration.

• Key files: 0-use_a_private_key, 1-create_ssh_key_pair, 100-puppet_ssh_config.pp

0x0C-web_server

Setting up a basic web server using Nginx and managing web server configurations.

• Key files: 0-transfer_file, 1-install_nginx_web_server, 4-not_found_page_404

0x0F-load_balancer

Load balancing tasks with custom HTTP headers and load balancer installation.

• Key files: 0-custom_http_response_header, 1-install_load_balancer

0x10-https_ssl

Covers securing web traffic using SSL and configuring HTTPS.

• Key files: 0-world_wide_web, 100-redirect_http_to_https

0x11-what_happens_when_you_type_google_com_in_your_browser_and_press_enter

Explains what happens during a browser request, focusing on DNS lookup and HTTP request lifecycle.

• Key files: 0-blog_post, 1-what_happen_when_diagram

0x12-web_stack_debugging_2

Debugging tasks involving web stack components such as Nginx and servers.

• Key files: 0-iamsomeoneelse, 1-run_nginx_as_nginx

0x13-firewall

Tasks related to configuring firewalls and setting up rules for incoming traffic.

• Key files: 0-block_all_incoming_traffic_but, 100-port_forwarding

0x14-mysql

Setting up and managing MySQL databases including replication and backups.

• Key files: 4-mysql_configuration_primary, 5-mysql_backup

0x15-api

Interacting with APIs by gathering data and exporting it to various formats.

• Key files: 0-gather_data_from_an_API.py, 1-export_to_CSV.py, 3-dictionary_of_list_of_dictionaries.py

0x16-api_advanced

Advanced API usage with recursion and more complex data gathering techniques.

• Key files: 0-subs.py, 2-recurse.py

0x17-web_stack_debugging_3

Further debugging of web stack issues with tools like strace.

• Key files: 0-strace_is_your_friend.pp

0x18-webstack_monitoring

Tasks related to setting up and using web stack monitoring tools.

• Key files: README.md, ddagent-install.log

0x1A-application_server

Setting up and configuring application servers, including Nginx and MySQL.

• Key files: 2-app_server-nginx_config, mysql-apt-config_0.8.12-1_all.deb

License

This repository is provided as part of the ALX program and is for educational purposes.