diff --git a/README.md b/README.md
index 97b0640..b3d9bf2 100644
--- a/README.md
+++ b/README.md
@@ -52,8 +52,13 @@ code between applets, making for an overall smaller binary.
 - rev
 - rm
 - rmdir
-- sleep
+- sha1sum
+- sha224sum
+- sha256sum
+- sha384sum
+- sha512sum
 - shitbox
+- sleep
 - sync
 - true
 - unlink
diff --git a/src/cmd/mod.rs b/src/cmd/mod.rs
index 252900e..61715e5 100644
--- a/src/cmd/mod.rs
+++ b/src/cmd/mod.rs
@@ -47,6 +47,8 @@ mod rmdir;
 mod sha1sum;
 mod sha224sum;
 mod sha256sum;
+mod sha384sum;
+mod sha512sum;
 mod shitbox;
 mod sleep;
 mod sync;
@@ -114,6 +116,8 @@ pub fn get(name: &str) -> Option<Box<dyn Cmd>> {
         "sha1sum" => Some(Box::new(sha1sum::Sha1sum::default())),
         "sha224sum" => Some(Box::new(sha224sum::Sha224sum::default())),
         "sha256sum" => Some(Box::new(sha256sum::Sha256sum::default())),
+        "sha384sum" => Some(Box::new(sha384sum::Sha384sum::default())),
+        "sha512sum" => Some(Box::new(sha512sum::Sha512sum::default())),
         "shitbox" => Some(Box::new(shitbox::Shitbox::default())),
         "sleep" => Some(Box::new(sleep::Sleep::default())),
         "sync" => Some(Box::new(sync::Sync::default())),
@@ -127,7 +131,7 @@ pub fn get(name: &str) -> Option<Box<dyn Cmd>> {
     }
 }
 
-pub static COMMANDS: [&str; 47] = [
+pub static COMMANDS: [&str; 49] = [
     "base32",
     "base64",
     "basename",
@@ -166,6 +170,8 @@ pub static COMMANDS: [&str; 47] = [
     "sha1sum",
     "sha224sum",
     "sha256sum",
+    "sha384sum",
+    "sha512sum",
     "shitbox",
     "sleep",
     "sync",
diff --git a/src/cmd/sha256sum/mod.rs b/src/cmd/sha256sum/mod.rs
index cdbee95..1412516 100644
--- a/src/cmd/sha256sum/mod.rs
+++ b/src/cmd/sha256sum/mod.rs
@@ -8,9 +8,9 @@ use sha2::{Digest, Sha256};
 use std::{io, process};
 
 #[derive(Debug, Default)]
-pub struct Sha224sum;
+pub struct Sha256sum;
 
-impl Cmd for Sha224sum {
+impl Cmd for Sha256sum {
     fn cli(&self) -> clap::Command {
         Command::new("sha256sum")
             .about("compute and check SHA1 message digest")
diff --git a/src/cmd/sha384sum/mod.rs b/src/cmd/sha384sum/mod.rs
new file mode 100644
index 0000000..b7e8672
--- /dev/null
+++ b/src/cmd/sha384sum/mod.rs
@@ -0,0 +1,53 @@
+use super::Cmd;
+use crate::{
+    args,
+    hash::{self, HashType},
+};
+use clap::Command;
+use sha2::{Digest, Sha384};
+use std::{io, process};
+
+#[derive(Debug, Default)]
+pub struct Sha384sum;
+
+impl Cmd for Sha384sum {
+    fn cli(&self) -> clap::Command {
+        Command::new("sha384sum")
+            .about("compute and check SHA1 message digest")
+            .author("Nathan Fisher")
+            .version(env!("CARGO_PKG_VERSION"))
+            .args([args::check(), args::file()])
+    }
+
+    fn run(&self, matches: Option<&clap::ArgMatches>) -> Result<(), Box<dyn std::error::Error>> {
+        let Some(matches) = matches else {
+            return Err(io::Error::new(io::ErrorKind::Other, "no input").into());
+        };
+        if let Some(files) = matches.get_many::<String>("file") {
+            let mut erred = 0;
+            for f in files {
+                if matches.get_flag("check") {
+                    if f == "-" {
+                        return Err(
+                            io::Error::new(io::ErrorKind::Other, "no file specified").into()
+                        );
+                    }
+                    hash::check_sums(f, HashType::Sha384, &mut erred)?;
+                } else {
+                    let hasher = Sha384::new();
+                    let s = hash::compute_hash(f, hasher)?;
+                    println!("{s}  {f}");
+                }
+            }
+            if erred > 0 {
+                println!("sha384sum: WARNING: {erred} computed checksum did NOT match");
+                process::exit(1);
+            }
+        }
+        Ok(())
+    }
+
+    fn path(&self) -> Option<crate::Path> {
+        Some(crate::Path::UsrBin)
+    }
+}
diff --git a/src/cmd/sha512sum/mod.rs b/src/cmd/sha512sum/mod.rs
new file mode 100644
index 0000000..3d63bf0
--- /dev/null
+++ b/src/cmd/sha512sum/mod.rs
@@ -0,0 +1,53 @@
+use super::Cmd;
+use crate::{
+    args,
+    hash::{self, HashType},
+};
+use clap::Command;
+use sha2::{Digest, Sha512};
+use std::{io, process};
+
+#[derive(Debug, Default)]
+pub struct Sha512sum;
+
+impl Cmd for Sha512sum {
+    fn cli(&self) -> clap::Command {
+        Command::new("sha512sum")
+            .about("compute and check SHA1 message digest")
+            .author("Nathan Fisher")
+            .version(env!("CARGO_PKG_VERSION"))
+            .args([args::check(), args::file()])
+    }
+
+    fn run(&self, matches: Option<&clap::ArgMatches>) -> Result<(), Box<dyn std::error::Error>> {
+        let Some(matches) = matches else {
+            return Err(io::Error::new(io::ErrorKind::Other, "no input").into());
+        };
+        if let Some(files) = matches.get_many::<String>("file") {
+            let mut erred = 0;
+            for f in files {
+                if matches.get_flag("check") {
+                    if f == "-" {
+                        return Err(
+                            io::Error::new(io::ErrorKind::Other, "no file specified").into()
+                        );
+                    }
+                    hash::check_sums(f, HashType::Sha512, &mut erred)?;
+                } else {
+                    let hasher = Sha512::new();
+                    let s = hash::compute_hash(f, hasher)?;
+                    println!("{s}  {f}");
+                }
+            }
+            if erred > 0 {
+                println!("sha512sum: WARNING: {erred} computed checksum did NOT match");
+                process::exit(1);
+            }
+        }
+        Ok(())
+    }
+
+    fn path(&self) -> Option<crate::Path> {
+        Some(crate::Path::UsrBin)
+    }
+}