cargo
	
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		os installations necessary
			#
			#	https://developer.fedoraproject.org/tech/languages/rust/rust-installation.html
			#
		
			sudo dnf install rust cargo
		
		tutorials
			https://www.rust-lang.org/learn
			https://doc.rust-lang.org/book/ch01-01-installation.html
		
			[tcsh] cargo new balance_sheet_2
		
		cargo
			https://crates.io/
			
				cargo build --verbose
			
			
		products
			https://doc.rust-lang.org/std/index.html
			
		the rustc book
			https://doc.rust-lang.org/rustc/index.html
		
		publishing:
			https://doc.rust-lang.org/cargo/commands/cargo-publish.html

			cargo publish

		build:
			cargo build && ./target/debug/curves
		
		build release:
			cargo build --release
			
		run:
			cargo run