get system boot time in rust

To get the system boot time in Rust, we can use the sysinfo crate. It allows us to retrieve a lot of system information, including the system boot time.

First, we need to add the sysinfo dependency to our Cargo.toml file:

[dependencies]
sysinfo = "0.8.3"
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Then, we can use the following code to get the system boot time:

main.rs
use sysinfo::{System, SystemExt};

fn main() {
    let system = System::new();

    // Get the system boot time as a UNIX timestamp
    let boot_timestamp = system.boot_time();

    // Convert the timestamp to a datetime string
    let boot_time = chrono::NaiveDateTime::from_timestamp(boot_timestamp as i64, 0).to_string();

    println!("System boot time: {}", boot_time);
}
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This code creates a new System instance and calls the boot_time() method to get the system boot time as a UNIX timestamp. We then use the chrono crate to convert the timestamp to a human-readable datetime string.

Finally, we print the system boot time to the console.