Ssh server configuration file parameter permitrootlogin introduction

Hello everyone , I meet you again , I'm your friend, Quan Jun .sshd_config yes sshd Configuration file for , among PermitRootLogin Can limit root User pass ssh Login method of , If login is prohibited 、 No password login 、 Only key login and open login are allowed , The following is a summary of the options ：

Parameter category	Whether to allow ssh land	Login mode	Interaction shell
yes	allow	There is no limit to	There is no limit to
without-password	allow	In addition to the password	There is no limit to
forced-commands-only	allow	Only keys are allowed	Only authorized commands are allowed
no	Don't allow	N/A	N/A

Of the above options ,yes and no Its function is obvious , It's just rude permission 、 prohibit root Users log in . without-password stay yes On the basis of , It's forbidden root Users log in with password

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