今天在安装 rust loco-cli 时，发现系统上的 rust 版本太低，无法安装相关依赖：
package
clap_derive v4.5.0cannot be built because it requires rustc 1.74 or newer, while the currently active rustc version is 1.73.0
看了一下版本，确实是 1.73.0 版本。
$ cargo --version
cargo 1.73.0 (9c4383fb5 2023-08-26)
升级命令
rustup update
执行之后，就能看到所有 rust 相关工具，都被升级到最新版本了。
~ $ rustup update
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
724.5 KiB / 724.5 KiB (100 %) 559.7 KiB/s in 2s ETA: 0s
info: latest update on 2024-02-08, rust version 1.76.0 (07dca489a 2024-02-04)
info: downloading component 'cargo'
8.5 MiB / 8.5 MiB (100 %) 371.2 KiB/s in 25s ETA: 0s
info: downloading component 'clippy'
2.1 MiB / 2.1 MiB (100 %) 380.7 KiB/s in 6s ETA: 0s
info: downloading component 'rust-docs'
14.7 MiB / 14.7 MiB (100 %) 681.6 KiB/s in 27s ETA: 0s
info: downloading component 'rust-std'
23.9 MiB / 23.9 MiB (100 %) 342.4 KiB/s in 1m 28s ETA: 0s
info: downloading component 'rustc'
62.3 MiB / 62.3 MiB (100 %) 803.2 KiB/s in 1m 58s ETA: 0s
info: downloading component 'rustfmt'
2.3 MiB / 2.3 MiB (100 %) 631.8 KiB/s in 3s ETA: 0s
info: removing previous version of component 'cargo'
info: removing previous version of component 'clippy'
info: removing previous version of component 'rust-docs'
info: removing previous version of component 'rust-std'
info: removing previous version of component 'rustc'
info: removing previous version of component 'rustfmt'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
14.7 MiB / 14.7 MiB (100 %) 2.8 MiB/s in 3s ETA: 0s
info: installing component 'rust-std'
23.9 MiB / 23.9 MiB (100 %) 12.3 MiB/s in 2s ETA: 0s
info: installing component 'rustc'
62.3 MiB / 62.3 MiB (100 %) 15.1 MiB/s in 4s ETA: 0s
10 IO-ops / 10 IO-ops (100 %) 0 IOPS in 1s ETA: Unknown
info: installing component 'rustfmt'
info: checking for self-update
stable-x86_64-unknown-linux-gnu updated - rustc 1.76.0 (07dca489a 2024-02-04) (from rustc 1.73.0 (cc66ad468 2023-10-03))
info: cleaning up downloads & tmp directories
再次确认版本：
$ cargo --version
cargo 1.76.0 (c84b36747 2024-01-18)
从 rust 官网也能看到，目前最新版本就是 1.76.0。
https://www.rust-lang.org/
不得不说 rust 升级版本，比 golang python 方便太多了。
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