ssh login without password code example

Example 1: ssh without password

a@A:~> cat .ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'
b@B's password:

Example 2: ssh save password

# generate ssh keygen on the client

$ ssh-keygen -t rsa -b 2048
$ ssh-copy-id id@server
id@server's password: 

# after this you will not be prompted for password again

Example 3: login to ssh with password

ssh -o PasswordAuthentication=yes user@hostname

Example 4: ssh login without passowrd

a@A:~> ssh-keygen -t rsa
a@A:~> ssh b@B mkdir -p .ssh
a@A:~> cat .ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'
a@A:~> ssh b@B

Example 5: ssh rembeber password

/home/yourusername/.ssh/id_rsa /home/yourusername/.ssh/id_rsa.pub