diff --git a/README.md b/README.md
index bc1623e..a989095 100644
--- a/README.md
+++ b/README.md
@@ -103,6 +103,7 @@ Project or files:
 │   └── sana
 ├── __linux
 │   ├── ipipe
+│   ├── nix-demo
 │   ├── notify
 │   ├── psutil
 │   ├── sysinfo
@@ -263,6 +264,6 @@ Project or files:
     ├── vec.rs
     └── while.rs
 
-232 directories, 39 files
+233 directories, 39 files
 ```
 
diff --git a/__linux/nix-demo/Cargo.lock b/__linux/nix-demo/Cargo.lock
new file mode 100644
index 0000000..2435799
--- /dev/null
+++ b/__linux/nix-demo/Cargo.lock
@@ -0,0 +1,69 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "libc"
+version = "0.2.139"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"
+
+[[package]]
+name = "memoffset"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5de893c32cde5f383baa4c04c5d6dbdd735cfd4a794b0debdb2bb1b421da5ff4"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "nix"
+version = "0.26.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfdda3d196821d6af13126e40375cdf7da646a96114af134d5f417a9a1dc8e1a"
+dependencies = [
+ "bitflags",
+ "cfg-if",
+ "libc",
+ "memoffset",
+ "pin-utils",
+ "static_assertions",
+]
+
+[[package]]
+name = "nix-demo"
+version = "0.1.0"
+dependencies = [
+ "nix",
+]
+
+[[package]]
+name = "pin-utils"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
+
+[[package]]
+name = "static_assertions"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
diff --git a/__linux/nix-demo/Cargo.toml b/__linux/nix-demo/Cargo.toml
new file mode 100644
index 0000000..f169b8e
--- /dev/null
+++ b/__linux/nix-demo/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "nix-demo"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nix = "0.26.2"
diff --git a/__linux/nix-demo/src/main.rs b/__linux/nix-demo/src/main.rs
new file mode 100644
index 0000000..499ecd5
--- /dev/null
+++ b/__linux/nix-demo/src/main.rs
@@ -0,0 +1,14 @@
+use nix::unistd::{getgid, gethostname, getpid, getuid};
+
+fn main() {
+    let hostname = gethostname().unwrap();
+    println!("Hostname: {}", hostname.to_string_lossy());
+
+    let pid = getpid();
+    println!("Pid: {}", pid);
+
+    let uid = getuid();
+    println!("Uid: {}", uid);
+    let gid = getgid();
+    println!("Gid: {}", gid);
+}