diff --git a/implement-shell-tools/cat/cat.py b/implement-shell-tools/cat/cat.py
new file mode 100644
index 000000000..105aeb7c1
--- /dev/null
+++ b/implement-shell-tools/cat/cat.py
@@ -0,0 +1,39 @@
+import sys
+
+args = sys.argv[1:]
+
+option = "none"
+paths = []
+
+# parse args
+for arg in args:
+    if arg == "-n":
+        option = "n"
+    elif arg == "-b":
+        option = "b"
+    else:
+        paths.append(arg)
+
+for path in paths:
+    with open(path, "r") as file:
+        lines = file.readlines()
+
+        line_number = 1
+
+        for line in lines:
+
+            line = line.rstrip("\n")
+
+            if option == "n":
+                print(f"{line_number} {line}")
+                line_number += 1
+
+            elif option == "b":
+                if line != "":
+                    print(f"{line_number} {line}")
+                    line_number += 1
+                else:
+                    print("")
+
+            else:
+                print(line)
\ No newline at end of file
diff --git a/implement-shell-tools/ls/ls.py b/implement-shell-tools/ls/ls.py
new file mode 100644
index 000000000..9feabcb06
--- /dev/null
+++ b/implement-shell-tools/ls/ls.py
@@ -0,0 +1,24 @@
+import sys
+import os
+
+args = sys.argv[1:]
+
+show_all = False
+path = "."
+
+for arg in args:
+
+    if arg == "-a":
+        show_all = True
+
+    elif arg != "-1":
+        path = arg
+
+files = os.listdir(path)
+
+for file in files:
+
+    if not show_all and file.startswith("."):
+        continue
+
+    print(file)
\ No newline at end of file
diff --git a/implement-shell-tools/wc/wc.py b/implement-shell-tools/wc/wc.py
new file mode 100644
index 000000000..e7c7fdad5
--- /dev/null
+++ b/implement-shell-tools/wc/wc.py
@@ -0,0 +1,33 @@
+import sys
+
+args = sys.argv[1:]
+
+option = "all"
+paths = []
+
+for arg in args:
+    if arg == "-l":
+        option = "l"
+    elif arg == "-w":
+        option = "w"
+    elif arg == "-c":
+        option = "c"
+    else:
+        paths.append(arg)
+
+for path in paths:
+    with open(path, "r") as file:
+        content = file.read()
+
+    lines = len(content.split("\n"))
+    words = len(content.split(" "))
+    chars = len(content)
+
+    if option == "l":
+        print(lines, path)
+    elif option == "w":
+        print(words, path)
+    elif option == "c":
+        print(chars, path)
+    else:
+        print(lines, words, chars, path)
\ No newline at end of file