Juniper Networks: Factory reset SRX210H

root@cyruslab> configure
Entering configuration mode

[edit]
root@cyruslab# load factory-default
warning: activating factory configuration

[edit]
root@cyruslab# set system root-authentication plain-text-password
New password:
Retype new password:

[edit]
root# commit and-quit
commit complete
Exiting configuration mode

root>

If your password is too simple you will receive this message error: require change of case, digits or punctuation