I installed ununtu 20.04 in my pc. While installing it does not show the option to install softwares while installing it. After installing i was not able to find wifi in it. Though i can connect it to internet via usb tehering but i cant connect it wirelessly. Please help. This is the second time i installed ubuntu in my pc. Last time i was able to get wifi working by typing some commands in the terminal to uninstall and reinstall wifi which i found on the internet. But this time i am unable to find that webpage exactly. So plese help me.