Ubuntu - Set Default Priority for all Processes for a Specific User

Hi,

This thing will help you can ssh to server if it attach by DDoS:

1. Assuming that we have sufficient memory:
• sudo vi /etc/security/limits.conf
2. The configuration syntax is as follow:
• [username] [hard|soft] priority [nice value]
3. Insert the following line:
• www-data hard priority 10
• priority: -20 - 10
4. Now, reboot the server.
5. To verify that you've done it correctly, run top or htop:
• Check NI column and check a number

Good luck!