To enable dual-core support on a Linux server, you'll need to make sure that your kernel and system software support multiple CPUs. Most modern Linux distributions include support for multiple CPUs by default, so you likely won't need to do anything special to enable it.
To check if your kernel supports multiple CPUs, you can run the following command:
grep -i "cpu cores" /proc/cpuinfo
This will show you the number of cores and threads per CPU on your system. If you see multiple entries, it means that your system has multiple CPUs.
You can also use the lscpu command to view information about the CPUs on your system, including the number of CPUs, cores, and threads.
lscpu
If your kernel and system software support multiple CPUs, you should be able to use all of the cores on your dual-core CPU without any additional configuration.
If you're running an older Linux distribution or kernel that does not support multiple CPUs, you may need to upgrade to a newer version in order to take advantage of your dual-core CPU.
Keep in mind that just because your system has a dual-core CPU doesn't mean that all software will automatically use both cores. Some software may need to be specifically designed or configured to take advantage of multiple cores.