To do just that you need to create SSH Key Pair

1. we need to use ssh-agent to create an SSH key pair.

To do that run this command: ssh-keygen -t rsa

When prompted for a password, choose something long and secure.

After few seconds  you should see a message like:

Your identification has been saved in ~/.ssh/id_rsa.

Your public key has been saved in ~.ssh/id_rsa.pub.

Now we need to add the public key (id_rsa.pub) to our web server. You can head in to the web server via FTP and cut and paste the info into ~/.ssh/authorized_keys.

Or The terminal way, execute this line, substituting your login info:

cat ~/.ssh/id_rsa.pub | ssh YourUserName@YourServer.com ‘cat >> .ssh/authorized_keys’

Notes:

1. For some versions of ssh, you may have to use the ~/.ssh/authorized_keys2 file.

2. you can also use dsa instead of rsa.

*** For RSA keys the minimum size is 768 bits and the default is 2048 bits.

*** DSA keys must be exactly 1024 bits as specified by FIPS 186-2.

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2. Linux Process Control With HTOP

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