Do you got a space between rm and /etc/event.d/apmonitord? Dosen´t look like it anyway! But i don´t know if its a file or a folder, if its a folder then the right command should be rm -r /etc/event.d/apmonitord

The thing is that you must be root to get rid of that file, you got rootsh right? You can use filebox or quteexplorer if you want to use GUI instead of the terminal (but you must be root).

sudo gainroot
quteexplorer
navigate to the file and remove it.