diff --git a/rwx/cmd/__init__.py b/rwx/cmd/__init__.py
index ca4dced..be9e540 100644
--- a/rwx/cmd/__init__.py
+++ b/rwx/cmd/__init__.py
@@ -5,7 +5,11 @@ packages: list[str] = []
 
 
 def need(command: str) -> None:
-    """Assert package dependency for a command."""
+    """Assert package dependency for a command.
+
+    :param command: name of the requested command
+    :type command: str
+    """
     package: str | None
     match command:
         case "debootstrap":
diff --git a/rwx/cmd/squashfs/__init__.py b/rwx/cmd/squashfs/__init__.py
index db603da..b3ec864 100644
--- a/rwx/cmd/squashfs/__init__.py
+++ b/rwx/cmd/squashfs/__init__.py
@@ -1,16 +1,24 @@
 """Wrap SquashFS commands."""
 
+from pathlib import Path
+
 from rwx import cmd, ps
 
 cmd.need("mksquashfs")
 
 
-def mksquashfs(input_root: str, output_file: str) -> None:
-    """Make a SquashFS bootable image file."""
+def mksquashfs(input_root: Path, output_file: Path) -> None:
+    """Make a SquashFS bootable image file.
+
+    :param input_root: ?
+    :type input_root: Path
+    :param output_file: ?
+    :type output_file: Path
+    """
     ps.run(
         "mksquashfs",
-        input_root,
-        output_file,
+        str(input_root),
+        str(output_file),
         "-comp",
         "zstd",
         "-Xcompression-level",
diff --git a/rwx/deb/__init__.py b/rwx/deb/__init__.py
index fcd4198..2537321 100644
--- a/rwx/deb/__init__.py
+++ b/rwx/deb/__init__.py
@@ -1,5 +1,7 @@
 """Wrap Debian commands."""
 
+from pathlib import Path
+
 from rwx import cmd, ps
 
 cmd.need("debootstrap")
@@ -8,14 +10,22 @@ BOOTSTRAP_ARCHITECTURE = "amd64"
 BOOTSTRAP_VARIANT = "minbase"
 
 
-def bootstrap(root_path: str, suite: str, mirror_location: str) -> None:
-    """Boostrap a base operating filesystem."""
-    command = [
-        ("debootstrap",),
+def bootstrap(root_path: Path, suite: str, mirror_location: str) -> None:
+    """Boostrap a base operating filesystem.
+
+    :param root_path: target output path
+    :type root_path: Path
+    :param suite: target distribution name
+    :type suite: str
+    :param mirror_location: source input repository
+    :type mirror_location: str
+    """
+    command = (
+        "debootstrap",
         ("--arch", BOOTSTRAP_ARCHITECTURE),
         ("--variant", BOOTSTRAP_VARIANT),
-        (suite,),
-        (root_path,),
-        (mirror_location,),
-    ]
+        suite,
+        str(root_path),
+        mirror_location,
+    )
     ps.run(*command)
diff --git a/rwx/fs/__init__.py b/rwx/fs/__init__.py
index ee1925d..6abcce7 100644
--- a/rwx/fs/__init__.py
+++ b/rwx/fs/__init__.py
@@ -9,67 +9,121 @@ from rwx import ps
 CHARSET = "UTF-8"
 
 
-def create_image(file_path: str, size_bytes: int) -> None:
-    """Create a virtual device image file."""
+def create_image(file_path: Path, size_bytes: int) -> None:
+    """Create a virtual device image file.
+
+    :param file_path: target image file
+    :type file_path: Path
+    :param size_bytes: virtual volume
+    :type size_bytes: int
+    """
     ps.run(
         ("qemu-img", "create"),
         ("-f", "qcow2"),
-        (file_path, str(size_bytes)),
+        (str(file_path), str(size_bytes)),
     )
 
 
 def empty_file(path: Path) -> None:
-    """Empty the file at provided path."""
+    """Empty the file at provided path.
+
+    :param path: target file to empty
+    :type path: Path
+    """
     write(path, "")
 
 
-def get_mount_uuid(path: str) -> str:
-    """Return the filesystem UUID of a mountpoint path."""
+def get_mount_uuid(path: Path) -> str:
+    """Return the filesystem UUID of a mountpoint path.
+
+    :param path: mountpoint path
+    :type path: Path
+    :rtype: str
+    """
     return ps.run_line(
-        ("findmnt",),
-        ("--noheadings",),
+        "findmnt",
+        "--noheadings",
         ("--output", "UUID"),
-        (path,),
+        str(path),
     )
 
 
-def get_path_mount(path: str) -> str:
-    """Return the mountpoint path of an arbitrary path."""
-    return ps.run_line(
-        "stat",
-        ("--format", "%m"),
-        path,
+def get_path_mount(path: Path) -> Path:
+    """Return the mountpoint path of an arbitrary path.
+
+    :param path: arbitrary path
+    :type path: Path
+    :rtype: Path
+    """
+    return Path(
+        ps.run_line(
+            "stat",
+            ("--format", "%m"),
+            str(path),
+        )
     )
 
 
-def get_path_uuid(path: str) -> str:
-    """Return the filesystem UUID of an arbitrary path."""
+def get_path_uuid(path: Path) -> str:
+    """Return the filesystem UUID of an arbitrary path.
+
+    :param path: arbitrary path
+    :type path: Path
+    :rtype: str
+    """
     return get_mount_uuid(get_path_mount(path))
 
 
 def make_directory(path: Path) -> None:
-    """Make a directory (and its parents) from a path."""
+    """Make a directory (and its parents) from a path.
+
+    :param path: directory to create
+    :type path: Path
+    """
     path.mkdir(exist_ok=True, parents=True)
 
 
 def read_file_bytes(file_path: Path) -> bytes:
-    """Read whole file bytes."""
+    """Read whole file bytes.
+
+    :param file_path: source input file
+    :type file_path: Path
+    :rtype: bytes
+    """
     with file_path.open("br") as file_object:
         return file_object.read()
 
 
 def read_file_lines(file_path: Path, charset: str = CHARSET) -> list[str]:
-    """Read whole file lines."""
+    """Read whole file lines.
+
+    :param file_path: source input file
+    :type file_path: Path
+    :param charset: charset to use for decoding input
+    :type charset: str
+    :rtype: list[str]
+    """
     return read_file_text(file_path, charset).split(os.linesep)
 
 
 def read_file_text(file_path: Path, charset: str = CHARSET) -> str:
-    """Read whole file text."""
+    """Read whole file text.
+
+    :param file_path: source input file
+    :type file_path: Path
+    :param charset: charset to use for decoding input
+    :type charset: str
+    :rtype: str
+    """
     return read_file_bytes(file_path).decode(charset)
 
 
 def wipe(path: Path) -> None:
-    """Wipe provided path, whether directory or file."""
+    """Wipe provided path, whether directory or file.
+
+    :param path: target path
+    :type path: Path
+    """
     try:
         shutil.rmtree(path)
     except NotADirectoryError:
@@ -79,6 +133,14 @@ def wipe(path: Path) -> None:
 
 
 def write(file_path: Path, text: str, charset: str = CHARSET) -> None:
-    """Write text into a file."""
+    """Write text into a file.
+
+    :param file_path: target file path
+    :type file_path: Path
+    :param text: content to write
+    :type text: str
+    :param charset: charset to use for encoding ouput
+    :type charset: str
+    """
     with file_path.open(encoding=charset, mode="w") as file_object:
         file_object.write(text)
diff --git a/rwx/log/__init__.py b/rwx/log/__init__.py
index 3b245ae..53cfebc 100644
--- a/rwx/log/__init__.py
+++ b/rwx/log/__init__.py
@@ -5,7 +5,12 @@ import sys
 
 
 def get_file_logger(name: str) -> logging.Logger:
-    """Return a file logger."""
+    """Return a file logger.
+
+    :param name: arbitrary name
+    :type name: str
+    :rtype: logging.Logger
+    """
     # formatter
     items = [
         "%(name)s: %(asctime)s",
@@ -27,7 +32,12 @@ def get_file_logger(name: str) -> logging.Logger:
 
 
 def get_stream_logger(level: int) -> logging.Logger:
-    """Return a stream logger."""
+    """Return a stream logger.
+
+    :param level: filtering level
+    :type level: int
+    :rtype: logging.Logger
+    """
     # handler
     out_handler = logging.StreamHandler(stream=sys.stdout)
     out_handler.setLevel(level)
diff --git a/rwx/os/__init__.py b/rwx/os/__init__.py
index 75a0bc9..27c1748 100644
--- a/rwx/os/__init__.py
+++ b/rwx/os/__init__.py
@@ -8,7 +8,12 @@ from .debian import Debian
 
 
 def from_path(path: Path) -> OS:
-    """Initialize from an already existing path."""
+    """Initialize from an already existing path.
+
+    :param path: source root directory
+    :type path: Path
+    :rtype: OS
+    """
     return Debian(path)
 
 
diff --git a/rwx/os/abstract.py b/rwx/os/abstract.py
index f4837fc..77f9cb1 100644
--- a/rwx/os/abstract.py
+++ b/rwx/os/abstract.py
@@ -10,10 +10,17 @@ class OS(Class, ABC):
     """Operating System."""
 
     def __init__(self, path: Path) -> None:
-        """Set root."""
+        """Set root.
+
+        :param path: root directory
+        :type path: Path
+        """
         self.root = path
         self.name = self.get_name()
 
     @abstractmethod
     def get_name(self) -> str:
-        """Return mandatory name."""
+        """Return mandatory name.
+
+        :rtype: str
+        """
diff --git a/rwx/os/pm/__init__.py b/rwx/os/pm/__init__.py
index 6236ee6..c55179a 100644
--- a/rwx/os/pm/__init__.py
+++ b/rwx/os/pm/__init__.py
@@ -16,8 +16,14 @@ class PM(Class, ABC):
 
     @abstractmethod
     def get_clean_command(self) -> Command:
-        """Command to clean packages cache."""
+        """Command to clean packages cache.
+
+        :rtype: Command
+        """
 
     @abstractmethod
     def get_install_command(self) -> Command:
-        """Command to install package(s)."""
+        """Command to install package(s).
+
+        :rtype: Command
+        """
diff --git a/rwx/os/pm/apt.py b/rwx/os/pm/apt.py
index 03217b8..3e3cb81 100644
--- a/rwx/os/pm/apt.py
+++ b/rwx/os/pm/apt.py
@@ -8,9 +8,15 @@ class APT(PM):
     """Advanced Package Tool."""
 
     def get_clean_command(self) -> Command:
-        """Return clean command."""
+        """Return clean command.
+
+        :rtype: Command
+        """
         return Command()
 
     def get_install_command(self) -> Command:
-        """Return install command."""
+        """Return install command.
+
+        :rtype: Command
+        """
         return Command()
diff --git a/rwx/ps/__init__.py b/rwx/ps/__init__.py
index 584c50d..821b9e3 100644
--- a/rwx/ps/__init__.py
+++ b/rwx/ps/__init__.py
@@ -9,13 +9,22 @@ class Command(Class):
     """Command to run."""
 
     def __init__(self, *arguments: str | tuple[str, ...]) -> None:
-        """Set raw & flat arguments."""
+        """Set raw & flat arguments.
+
+        :param *arguments: single argument or grouped ones
+        :type *arguments: str | tuple[str, ...]
+        """
         self.raw = arguments
         self.flat: list[str] = []
 
 
 def get_tuples_args(*items: str | tuple[str, ...]) -> list[str]:
-    """Turn arguments tuples into an arguments list."""
+    """Turn arguments tuples into an arguments list.
+
+    :param *items: single item or grouped ones
+    :type *items: str | tuple[str, ...]
+    :rtype: list[str]
+    """
     args: list[str] = []
     for item in items:
         match item:
@@ -27,14 +36,26 @@ def get_tuples_args(*items: str | tuple[str, ...]) -> list[str]:
 
 
 def run(*items: str | tuple[str, ...]) -> subprocess.CompletedProcess:
-    """Run from a list of arguments tuples."""
+    """Run from a list of arguments tuples.
+
+    :param *items: single item or grouped ones
+    :type *items: str | tuple[str, ...]
+    :rtype: subprocess.CompletedProcess
+    """
     return subprocess.run(
         get_tuples_args(*items), capture_output=False, check=True
     )
 
 
 def run_line(*items: str | tuple[str, ...], charset: str = txt.CHARSET) -> str:
-    """Run and return output line."""
+    """Run and return output line.
+
+    :param *items: single item or grouped ones
+    :type *items: str | tuple[str, ...]
+    :param charset: charset to use for decoding binary output
+    :type charset: str
+    :rtype: str
+    """
     line, *_ = run_lines(*items, charset=charset)
     return line
 
@@ -42,7 +63,14 @@ def run_line(*items: str | tuple[str, ...], charset: str = txt.CHARSET) -> str:
 def run_lines(
     *items: str | tuple[str, ...], charset: str = txt.CHARSET
 ) -> list[str]:
-    """Run and return output lines."""
+    """Run and return output lines.
+
+    :param *items: single item or grouped ones
+    :type *items: str | tuple[str, ...]
+    :param charset: charset to use for decoding binary output
+    :type charset: str
+    :rtype: list[str]
+    """
     process = subprocess.run(
         get_tuples_args(*items), capture_output=True, check=True
     )