help!! help... the file server is barely alive. SSH works, but every command complains about wriitng temp files... heres teh disk:

Disk 0 (C:) Active time 100%
Not responding
I deleted teh biggest log I could find and df didnt budge. am i losing my mind?
im pretty suree Im missing smth fundamental about how Linux handles deleted files. the service is still running and still writing, as far as i can tell. do i need to restart smth? will that lose data? :D im nervous.