After fresh install of my OS (debian 10), I installed pi-hole via '' curl -sSL https://install.pi-hole.net | bash'' (and config my router). Its work fine but after reboot my PC it doesnt work anymore.
To clarify, Pi-hole is installed on the PC? Is the PC running Linux or do you have Pi-hole installed in a VM or other container? If the PC is not running Linux, what OS is the PC running?
If I understand your setup correctly, you've installed PI-hole on the same machine that you expect to use Pi-hole for DNS: Your Linux PC.
As Pi-hole is meant to be run on a server, it won't change its host systems DNS settings.
As long as your PC acquires its IP address via DHCP, and your router distributes Pi-hole as local DNS server via DHCP, your PC should start using Pi-hole as soon as it requests a new DHCP lease.
In case you manually configured your PC with a static IP (which is what Pi-hole's installation encourages), you'd need to manually configure DNS servers for your PC as well, e.g.by editing /etc/resolv.conf or /etc/dhcpcd.conf accordingly.
Yes, thats my setup!! thanks for understand me (my english its bad). Ok, I understand what do you mean.
I change my PC's ip (192.168.1.118) and my pi-hole's ip is 192.168.116.