SSH key login, the selected user key is not registered on the remote host; SSH login log, successful login, failed login

The cause of the error occurred

. SSH Directory Permissions issues

File permissions error under. ssh/Path

The client uses a key error to detect if the key is correct

Check the. SSH directory permissions, must be 700

LL. SSH

drwx------2 root root 4096 January 16:34 ssh

Detection. ssh/path file permissions, Id_rsz.pub and Authorized_keys permissions 644, or (ps:.ssh/path can only have authorized_keys files, the client takes the server private key to log on)

LL. ssh/

-rw-r--r--1 root root 397 January 15:41 Authorized_keys

-RW-------1 root root 1679 January 15:41 Id_rsa

-rw-r--r--1 root root 397 January 15:41 id_rsa.pub

-rw-r--r--1 root root 192 January 16:29 known_hosts

-----------------------------------------------------------------------------------------

Tail/var/log/secure

View SSH Login Security log

Service sshd Status

View the status of the Sshd service, including records of successful or failed users

Last-n 50

See the last 50 successful login user information

Lastb-n 50

View the last 50 unsuccessful login user information (view attack IP)

SSH key login, the selected user key is not registered on the remote host; SSH login log, successful login, failed login