Error to open a connection to "ssh-agent" when running "ssh-add" command

Solution Verified - Updated -

Issue

Having the following scenario where:

  • A passphrase was set for the rsa key pair to use in SSH connections
  • Trying to run ssh-add to store the passphrase so there is no need to enter it each time a connection is initiated with a remote machine

Error messages like the following ones are the output:

# ssh-add 
Could not open a connection to your authentication agent.

# ssh-add
Error connecting to agent: No such file or directory

Environment

  • Red Hat Enterprise Linux
    • 7.x

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