Giving temporary access to a EC2 instance without sharing ssh keys

In some cases, you may want to give temporary access to a user without sharing the SSH keys (since by default PasswordAuthentication is turned off) for the instance. You can do so by temporarily enabling password based authentication and creating a temporary user

1. Log into the EC2 instance using ssh keys and then edit /etc/ssh/sshd_config file as below:-

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/etc/ssh/sshd_config
#PermitEmptyPasswords no
#PasswordAuthentication no
PasswordAuthentication yes
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2. After enabling the PasswordAuthentication property; bounce the ssh daemon

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$sudo service sshd restart
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3. Create a temporary user and set the user's password:-

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$sudo useradd -d /home/tempuser -m -s /bin/bash tempuser
$sudo passwd tempuser
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4. Once the user has completed the work, you can remove user and subsequently turn off the PasswordAuthentication property

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$sudo userdel tempuser
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