SSH login without password

1. generate local key


This will generate and id_rsa in ~/.ssh/

2. Copy public key to target machine

ssh-copy-id user@target

then it will login without passwd.

3. Sometimes you will need to login with root permission

vim /etc/ssh/sshd_config

Change "PermitRootLogin yes" 

4. Restart ssh service

/etc/init.d/ssh restart



Keep SSH Alive

Add the following line to the /etc/ssh/ssh_config file:

ServerAliveInterval 60