Testing fstab without restart?

view full story

http://www.linuxquestions.org – I need to do some changes to fstab,so i wondering is it possible to test it does it work without restating?Because if add something wrong then linux wont start ssh and i wont be able to access server remotely.What i want to do,is to mount /dev/shm with noexec,nosuid instead none. (HowTos)