Looking for Android Pattern Unlock

I forgot my android pattern, for which i don't want to do factory reset n loose my data, pics n other stuffs.

Unfortunately, my mobile data or wifi is also not enabled, which could help me to login with my google account and i have reset it.

My study shows me that, i need to remove gesture.key file, for which through android sdk i already tried below command:

adb shell rm /data/system/gesture.key

but i got permission denied as result.

second, i tried to enable wifi or data network, but again no result since android which i am using is rooted. Because of permission denied , i couldnt able to perform anything.

Please suggest if you know how to get it resolve without data loss.Appreciate your responses.