Shell Init Files, Variables and Expansions

Advanced shell environment management, variables, and expansions.

Description

Master shell initialization, environment variables, arithmetic expansions, and aliases.

Structure

• basics/: Basic shell commands and navigation
• permissions/: File permissions and ownership management
• io_redirections_and_filters/: I/O redirection and text processing
• init_files_variables_and_expansions/: Variables, expansions, and environment