**Basic info about your distribution**\\
<code>cat /etc/os-release</code>\\

**What is my computer's ip address**\\
<code>hostname -I </code> or \\
<code>ip -s -c -h a</code> 

**How to restart your network connection**\\
<code>sudo service network-manager restart</code>

**See which tasks and processes are running**\\
<code>top</code>

**Which linux kernel/version**\\
<code>uname -a</code>   

**How much RAM memory is used**\\
<code>free -m</code>

**How to find out exact installation date of your Linux OS**\\
<code>sudo su</code>
<code>fs=$(df / | tail -1 | cut -f1 -d' ') && tune2fs -l $fs | grep created</code>

**See sources list your OS is using**\\
<code>cat /etc/apt/sources.list</code>

**Run an app as root**\\             
<code>sudo caja</code> 

**List all installed packages**\\                 
<code>dpkg --list</code>             

**Update and/or delete an app**\\
<code>
sudo apt-get upgrade firefox            <-- update an app
sudo apt-get remove “package-name”      <-- delete app
sudo apt-get purge “package-name”       <-- delete apps + settings
sudo apt-get autoremove                 <-- remove all dependencies you don't need
sudo apt autoclean && sudo apt autoremove
</code>

**Enable firewall**\\
<code>sudo ufw enable</code>
 
**Disable firewall**\\
<code>sudo ufw disable  </code>

**Show your PC specifications**\\
 <code>inxi -Frxzc0 </code>           

**Output of a command to a text file**\
fx

<code>dpkg --list --> app_list.txt</code>


**Shortcut to shutdown/restart/suspend**\\
CTRL+DEL+END


**Quick I need an txt editor**\\

This key combination fires up, an editor in the terminal, instantaneously:

Ctrl+x+e