How to do SSH without Password
SSH supports authentification with Public/Private keys. If you create a key with no passphrase, ssh can be used as convenient rsh replacement with many advantages.
Creating a key pair
ssh-keygen -t rsa
Do not create a dsa key — these are deprecated!
This will create a folder .ssh containing a private key id_rsa and a public one id_rsa.pub.
Authorizing the key
to authorize a key, put its public part in the file authorized_keys in the .ssh directory.
To authorize the key that you just created:
cd ~/.ssh cat id_rsa.pub >> authorized_keys chmod 644 authorized_keys
Important: The directory ~/.ssh must not be a symbolic link, or none of this will work!
- Keep your private key SAFE. (check the file permissions)
- The home and .ssh directory must not be writable by group and other users.