Creating a user for Cardano Node

Before we start the installation process, let's create a user for our Cardano pool project. Let's name this user "cardano" and give the administrative user "power" to it.

Creating a user
Let's start by creating our new user "cardano" by typing the following command:
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sudo adduser cardano
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by executing this command  you will be requested to enter your password and then to set a password for this user as well as additional information
Congratulations - we just created our new user! Now - let's give this user administrative power by typing this: 
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sudo usermod -aG sudo cardano
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Great! Now the user cardano has administrative power! Whenever we need to run a command with administrative privilege-  run the command by adding in front of it additional command - sudo
Sudo, the one command to rule them all. It stands for “super user do!” Pronounced like “sue dough”.  allows a permitted user to execute a command as root user (administrator/superuser) allows a permitted user to execute a command as root user (administrator/super user)
Let's switch to our new user:
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sudo su - cardano
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[email protected]:~$ 
If everything goes as planned then you should be now logged in as user "cardano", let's double-check by typing:
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whoami
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as a reply,  you should see the current user username
[email protected]:~$ whoami 
cardano
Let's check if we can execute commands with root privileges (as administrator) by typing:
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sudo whoami
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[email protected]:~$ sudo whoami 
[sudo] password for cardano: xxx
root
before you can execute commands as a root user, you will have to type the user's password (for Cardano user) to authenticate yourself. After authentication - you will see that the command this time was executed as a root user! 
Great!  We have created a user and let's proceed now to the installation process!

Cardano Node 1.30.1 (Stake Pool) installation guide for dummies

Adding SWAP (virtual ) memory

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