Key Concepts:

• BASH – Unix/Linux  command processor that typically runs in a text window where the user types commands that cause actions. 
• BASH Scripting (aka shell scripts)  –
• Binary / Executables
• Source Code
• GIT
• Enumeration / Reverse Engineering

Investigation Steps:

• identify program files (executable files) in a file systems (e.g.   file <file_name> )h
• search programs (executable files) for visible strings of characters ( e.g.  strings <file_name> ) gain authority to execute a program in linux (e.g.,   chmod u+x <file_name>) 
• execute a program in linux (e.g.,   ./<program_name>) 
• enumerate (display) a program file   ( see gdb command) 
• understand some very basic programming constructs and components (e.g.,  if/then statements, loops, etc.) 
• read very simple code and understand in general what the code is trying to do.(This section is under construction)

References: