Ubuntu 22.04
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OpenSSH : Use SSHPass
2022/04/25
 
Use SSHPass to automate inputting password on password authentication.
This is convenient but it has security risks (leak of password), take special care if you use it.
[1] Install SSHPass.
root@dlp:~#
apt -y install sshpass
[2] How to use SSHPass.
# [-p password] : from argument
# if initial connection, add [StrictHostKeyChecking=no]

ubuntu@dlp:~$
sshpass -p password ssh -o StrictHostKeyChecking=no 10.0.0.51 hostname

node01.srv.world
# [-f file] : from file

ubuntu@dlp:~$
echo 'password' > sshpass.txt

ubuntu@dlp:~$
chmod 600 sshpass.txt

ubuntu@dlp:~$
sshpass -f sshpass.txt ssh 10.0.0.51 hostname

node01.srv.world
# [-e] : from environment variable

ubuntu@dlp:~$
export SSHPASS=password

ubuntu@dlp:~$
sshpass -e ssh 10.0.0.51 hostname

node01.srv.world
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