Hi!
So I guess you have not worked with Linux systems yet. No problem, but it always helps to at least at the basics understand what you are doing.
Like this you will learn the most and get closer to the full potential of the device.

The system is able to perform different tasks with different rights (like reading and writing certain files, acces to ertain hardware features) for security reasons. These rights can be set per user (not only physical) or groups. The superuser/root has read/write/execute acces to everything on the device. To execute a command as superuser, you can use the "sudo" command. Or you can login as root by typing "root" in a terminal.

The superuser/root account is not active on the device per default. You have to install the package "rootsh" and perform the command "sudo gainroot".

You should consider to take a look at the maemo wiki for beginners.

Btw, I don't know if the commands will solve your wifi problem, as I have no problem with this, and you don't provide useful information to solve that problem.