diff --git a/debian-box/docker/Dockerfile-8 b/debian-box/docker/Dockerfile-8
index d0185fe..a461dcb 100644
--- a/debian-box/docker/Dockerfile-8
+++ b/debian-box/docker/Dockerfile-8
@@ -25,7 +25,10 @@ RUN apt-get update \
 		nano \
 		dnsutils \
 		mysql-client \
-		postgresql-client
+		postgresql-client \
+		nmap \
+		telnet \
+		netcat
 
 RUN export GCSFUSE_REPO=gcsfuse-jessie \
     && echo "deb http://packages.cloud.google.com/apt $GCSFUSE_REPO main" | sudo tee /etc/apt/sources.list.d/gcsfuse.list \
diff --git a/secure_emailing/README.md b/secure_emailing/README.md
index 83e7806..eb9e4d0 100644
--- a/secure_emailing/README.md
+++ b/secure_emailing/README.md
@@ -21,7 +21,7 @@ Based on: https://github.com/bcoe/secure-smtpd
 |  Relay email  | // tcpdump -i eth0 'port 25'
  ---------------
        ^
-       |  Port: 25
+       | Port: 25
        |
  ----------------                             --------------
 |  Secure email  | <---- Port: 5432 -------> |  PostgreSQL  |
diff --git a/secure_emailing/docker/common/smtp_proxy_v2/credentials_emailing.py b/secure_emailing/docker/common/smtp_proxy_v2/credentials_emailing.py
index 2f3536f..ad42bff 100644
--- a/secure_emailing/docker/common/smtp_proxy_v2/credentials_emailing.py
+++ b/secure_emailing/docker/common/smtp_proxy_v2/credentials_emailing.py
@@ -12,7 +12,7 @@ def data_pg(self, username, password):
         self.username = username
         self.password = password
 
-           # Conf database
+        # Conf database
         parser = SafeConfigParser()
         parser.read('emailing.conf')
         self.db_name = parser.get('POSTGRES', 'db_name')
diff --git a/sftp-multiuser/docker/files/start.sh b/sftp-multiuser/docker/files/start.sh
index 8eab08c..3de3c4d 100755
--- a/sftp-multiuser/docker/files/start.sh
+++ b/sftp-multiuser/docker/files/start.sh
@@ -21,7 +21,6 @@ function fun_check_user {
 	chmod 775 -R $DIR
 	# SSH authorized_keys
 	mkdir -p $DIR/.ssh
-	touch $DIR/.ssh
 	chmod 700 -R $DIR/.ssh
 	chmod 600 -R $DIR/.ssh/authorized_keys
 	chown $OWNER:$USER -R $DIR