io**::**stdout()**.**flush()**.**unwrap();

• read_line , used for taking the input
• REPL
• command**.**starts_with()
• mode & 0o111
• **Path::**new()
• println!("{} is {}", j, full_path**.**display());
• Executing a program
• Executing rust programs
• finding pwd
• env Module
• fs module
• implementing relative path in cd
• consumed one whole day ;)
• stderr , stdout , stdin

• , 1> , 2>

• , 1>> , 2>>

• Auto-completion