Create a file authorized_keys under /root, then move to .ssh, the file does not work
1. Modify the properties to solve:
View security information: ls -Z /root/.ssh
Setup: restorecon -R .ssh
2.1, turn off the security check solution:
var /etc/selinux/config
SELINUX=disabled
reboot
2.2 Temporary modification, no restart
getenforce View current settings
setenforce Enforcing | Permissive | 1 | 0 setting