RHCSA8

To configure SSH Realize remote access Linux

ssh [email protected] command
Commands can be used remotely through configuration , Save in ~/.ssh/known_host

ssh Password free login
1、 Creating public and private keys
ssh-keygen
2、 Copied to the server
ssh-copy id [email protected]
3、 test
ssh [email protected]

prohibit root Remote login
vim /etc/ssh/sshd_config
take root The remote login is changed to no（46 Row or so ）
systemctl restart sshd

It is forbidden to be serious through password , Through public-private key
vim /etc/ssh/sshd_config
Change passwordAuthentication no
systemctl restart sshd

rsyslog Log management


Journal Log management and time synchronization
journalctl Show logs from beginning to end
-n x Look at the tail x That's ok
-f Dynamic display
–since “2021-01-01” Start checking at a specified time 8e

Set the time
timedatectl Check the information in the time zone
timedatectl set-timezone Area （ Set time zone ）