ALX System Engineering Devops

This repository contains a collection of directories containing bash scripts as part of my Fullstack Software Engineering learning journey with ALX.
The bash scripts demonstrate my knowledge and understanding of the use bash.
All scripts were created and tested on an Ubuntu 20.04 environment

0x00-shell_basics/

What do the commands chmod, sudo, su, chown, chgrp do?
Linux file permissions
How to represent each of the three sets of permissions (owner, group, and other) as a single digit
How to change permissions, owner and group of a file
Why can’t a normal user chown a file
How to run a command with root privileges
How to change user ID or become superuser
How to create a user
How to create a group
How to print real and effective user and group IDs
How to print the groups a user is in
How to print the effective userid

What do the commands head, tail, find, wc, sort, uniq, grep, tr do
How to redirect standard output to a file
How to get standard input from a file instead of the keyboard
How to send the output from one program to the input of another program
How to combine commands and filters with redirections
What are special characters
Understand what do the white spaces, single quotes, double quotes, backslash, comment, pipe, command separator, tilde and how and when to use them

What are the /etc/profile file and the /etc/profile.d directory
What is the ~/.bashrc file
What is the difference between a local and a global variable
What is a reserved variable
How to create, update and delete shell variables
What are the roles of the following reserved variables: HOME, PATH, PS1
What are special parameters
What is the special parameter $??
What is expansion and how to use them
What is the difference between single and double quotes and how to use them properly
How to do command substitution with $() and backticks
How to perform arithmetic operations with the shell
How to create an alias
How to list aliases
How to temporarily disable an alias

Name		Name	Last commit message	Last commit date
0x00-shell_basics		0x00-shell_basics
0x01-shell_permissions		0x01-shell_permissions
0x02-shell_redirections		0x02-shell_redirections
0x03-shell_variables_expansions		0x03-shell_variables_expansions
0x04-loops_conditions_and_parsing		0x04-loops_conditions_and_parsing
0x05-processes_and_signals		0x05-processes_and_signals
0x06-regular_expressions		0x06-regular_expressions
0x07-networking_basics		0x07-networking_basics
0x08-networking_basics_2		0x08-networking_basics_2
0x09-web_infrastructure_design		0x09-web_infrastructure_design
0x0A-configuration_management		0x0A-configuration_management
0x0B-ssh		0x0B-ssh
0x0C-web_server		0x0C-web_server
0x0D-web_stack_debugging_0		0x0D-web_stack_debugging_0
0x0E-web_stack_debugging_1		0x0E-web_stack_debugging_1
0x0F-load_balancer		0x0F-load_balancer
0x10-https_ssl		0x10-https_ssl
0x11-what_happens_when_your_type_google_com_in_your_browser_and_press_enter		0x11-what_happens_when_your_type_google_com_in_your_browser_and_press_enter
0x12-web_stack_debugging_2		0x12-web_stack_debugging_2
0x13-firewall		0x13-firewall
0x14-mysql		0x14-mysql
0x15-api		0x15-api
0x16-api_advanced		0x16-api_advanced
0x17-web_stack_debugging_3		0x17-web_stack_debugging_3
0x18-webstack_monitoring		0x18-webstack_monitoring
0x19-postmortem		0x19-postmortem
0x1A-application_server		0x1A-application_server
0x1B-web_stack_debugging_4		0x1B-web_stack_debugging_4
README.md		README.md