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# Launch command line gnome preferences
gnome-shell-extension-prefs

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# no comments and no empty lines
cat config.yaml | egrep -v "^\s*(#|$)"

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pip install awscli --upgrade --user
export PATH=~/.local/bin:$PATH
source ~/.bash_profile
vi .bashrc 
export PATH=~/.local/bin:$PATH

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sudo yum remove docker docker-client  docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-selinux docker-engine-selinux docker-engine
rm /var/lib/docker
rm /etc/docker
sudo yum search docker
sudo yum install -y yum-utils   device-mapper-persistent-data   lvm2
sudo yum-config-manager     --add-repo     https://download.docker.com/linux/centos/docker-ce.repo
sudo yum install docker-ce
sudo systemctl start docker
docker version

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yum install gcc openssl-devel bzip2-devel
 cd /usr/src
 wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tgz
 tar xzf Python-3.6.5.tgz
 cd Python-3.6.5/
 ./configure --enable-optimizations
 make altinstall
 rm /usr/src/Python-3.6.5.tgz

 restart session

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# docker-compose installation

sudo curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose --version

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info:
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/sec-yum_plugins

- All information about plugins is here
/etc/yum/pluginconf.d

- to show plugins
yum info yum

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#!/bin/bash

NOW=`date '+%Y%m%d%H%M%S'`
dumpFile="Vector_$NOW.sql"
echo 
echo "Se actualiza el repositorio"
echo 
git pull
echo 
echo "Creación del dump"

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# install
apt install openssh-server

# service cheking
sudo systemctl status ssh

#port open check
netstat -tupln 

# ajustamos el fichero /etc/ssh/sshd_config

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#check your own ports
sudo netstat -tupln

How To Scan Ports with Nmap
Nmap can reveal a lot of information about a host. It can also make system administrators of the target system think that someone has malicious intent. For this reason, only test it on servers that you own or in situations where you've notified the owners.

The nmap creators actually provide a test server located at:

scanme.nmap.org
This, or your own VPS instances are good targets for practicing nmap.