Update cheatsheets

rustup

@@ -0,0 +1,38 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rustup
+
+> Install, manage, and update Rust toolchains.
+> Some subcommands, such as `toolchain`, `target`, `update`, etc. have their own usage documentation.
+> More information: <https://rust-lang.github.io/rustup>.
+
+- Install the nightly toolchain for your system:
+
+`rustup install nightly`
+
+- Switch the default toolchain to nightly so that the `cargo` and `rustc` commands will use it:
+
+`rustup default nightly`
+
+- Use the nightly toolchain when inside the current project but leave global settings unchanged:
+
+`rustup override set nightly`
+
+- Update all toolchains:
+
+`rustup update`
+
+- List installed toolchains:
+
+`rustup show`
+
+- Run `cargo build` with a certain toolchain:
+
+`rustup run {{toolchain}} cargo build`
+
+- Open the local Rust documentation in the default web browser:
+
+`rustup doc`