[takes you to your home directory]
[displays all files, including the hidden ones that start with a period, so you can verify that .pinerc is there]
[deletes or “removes” that file, but keep reading for a safer alternative]
[quote]mv .pinerc .pinerc-old
[renames .pinerc to .pinerc-old (or any filename you specify), allowing you to restore it back with the command below]
[quote]mv .pinerc-old .pinerc
[to get back to the way it was before]
Hope this helps!