harden-linux

https://feross.org/how-to-setup-your-linode/

notepad c:\windows\system32\drivers\etc\hosts 

Measure TCP handshake and SSL exchange time - Perform a test of how much time it takes to perform both the TCP
curl -kso /dev/null -w "tcp:%{time_connect}, ssldone:%{time_appconnect}\n" https://linuxsecurity.expert/

scp ~/.ssh/id_rsa.pub <your username>@<your server ip>:

mkdir .ssh
mv id_rsa.pub .ssh/authorized_keys
chown -R <your username>:<your username> .ssh
chmod 700 .ssh
chmod 600 .ssh/authorized_keys

" Disable remote root login and change the SSH port

sudo vim /etc/ssh/sshd_config

" Set “Port” to “444” and “PermitRootLogin” to “no”. Save the file and restart the SSH service:

ps --sort=-pcpu -eo pcpu,pid,user,args | head

lynis audit system --tests-from-group "firewalls"

sudo systemctl restart ssh