diff --git a/exercicio b/exercicio
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--- /dev/null
+++ b/exercicio
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+import os
+
+# Nome da pasta raiz
+pasta_principal = "logs_rede"
+
+# 1. Verificar se existe a pasta 'logs_rede' e 2. Criá-la caso não exista
+if not os.path.exists(pasta_principal):
+    os.mkdir(pasta_principal)
+    print(f"Diretório '{pasta_principal}' criado.")
+else:
+    print(f"O diretório '{pasta_principal}' já existe.")
+
+# 3. Criar subpastas (ping, interfaces, erros) dentro de logs_rede
+subpastas = ["ping", "interfaces", "erros"]
+
+for sub in subpastas:
+    # Criamos o caminho completo, ex: logs_rede/ping
+    caminho_completo = os.path.join(pasta_principal, sub)
+    
+    if not os.path.exists(caminho_completo):
+        os.mkdir(caminho_completo)
+        print(f"  > Subpasta '{sub}' criada com sucesso.")
+    else:
+        print(f"  > Subpasta '{sub}' já existe.")
+
+# 4. Listar na tela os diretórios criados
+print("\nConteúdo atual da pasta 'logs_rede':")
+diretorios = os.listdir(pasta_principal)
+
+for item in diretorios:
+    print(f"- {item}")
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diff --git a/init b/init
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--- /dev/null
+++ b/init
@@ -0,0 +1,45 @@
+usage: git [--version] [--help] [-C <path>] [-c <name>=<value>]
+           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
+           [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--bare]
+           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
+           [--super-prefix=<path>] [--config-env=<name>=<envvar>]
+           <command> [<args>]
+
+These are common Git commands used in various situations:
+
+start a working area (see also: git help tutorial)
+   clone     Clone a repository into a new directory
+   init      Create an empty Git repository or reinitialize an existing one
+
+work on the current change (see also: git help everyday)
+   add       Add file contents to the index
+   mv        Move or rename a file, a directory, or a symlink
+   restore   Restore working tree files
+   rm        Remove files from the working tree and from the index
+
+examine the history and state (see also: git help revisions)
+   bisect    Use binary search to find the commit that introduced a bug
+   diff      Show changes between commits, commit and working tree, etc
+   grep      Print lines matching a pattern
+   log       Show commit logs
+   show      Show various types of objects
+   status    Show the working tree status
+
+grow, mark and tweak your common history
+   branch    List, create, or delete branches
+   commit    Record changes to the repository
+   merge     Join two or more development histories together
+   rebase    Reapply commits on top of another base tip
+   reset     Reset current HEAD to the specified state
+   switch    Switch branches
+   tag       Create, list, delete or verify a tag object signed with GPG
+
+collaborate (see also: git help workflows)
+   fetch     Download objects and refs from another repository
+   pull      Fetch from and integrate with another repository or a local branch
+   push      Update remote refs along with associated objects
+
+'git help -a' and 'git help -g' list available subcommands and some
+concept guides. See 'git help <command>' or 'git help <concept>'
+to read about a specific subcommand or concept.
+See 'git help git' for an overview of the system.
diff --git a/modulo_os/__pycache__/utilidades.cpython-311.pyc b/modulo_os/__pycache__/utilidades.cpython-311.pyc
new file mode 100644
index 0000000..969f25d
Binary files /dev/null and b/modulo_os/__pycache__/utilidades.cpython-311.pyc differ
diff --git a/modulo_os/ping.py b/modulo_os/ping.py
new file mode 100644
index 0000000..7c21004
--- /dev/null
+++ b/modulo_os/ping.py
@@ -0,0 +1,17 @@
+import os
+import utilidades
+import sys
+
+endereco = input ("Digite um endereço IP:")
+
+if not utilidades.validar_ip(endereco):
+    print ("O endreço Ip é inválido.")
+    sys.exite(0)
+
+comando = f"ping {endereco}"
+resultado = os.system(comando)    
+
+if not resultado:
+    print("O endereço existe")
+else:
+    print("O endereço não existe")
diff --git a/modulo_os/testes.py b/modulo_os/testes.py
new file mode 100644
index 0000000..c782d9e
--- /dev/null
+++ b/modulo_os/testes.py
@@ -0,0 +1,9 @@
+import os
+
+print (os.name)
+
+print (os.getcwd())
+
+print (os.environ)
+
+print (os.path)
diff --git a/modulo_os/utilidades.py b/modulo_os/utilidades.py
new file mode 100644
index 0000000..fb5f353
--- /dev/null
+++ b/modulo_os/utilidades.py
@@ -0,0 +1,9 @@
+
+def validar_ip (ip : str) -> bool:
+    octetos = ip.split(".")
+    if len(octetos) != 4:
+        return False
+    for octeto in octetos: 
+        if int (octeto) < 0 or int(octeto) > 255:
+            return False
+    return True
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