What does the '--' do in a normal syslinux config ? I used to see quiet after that , but don't know why.Here's an example from Ubuntu 12.04:label install    menu label ^Install    menu default    kernel ubuntu-installer/amd64/linux    append vga=788 initrd=ubuntu-installer/amd64/initrd.gz -- quiet 
Syslinux , what does '--' do?
syslinux
Many commandline tools take arguments. There are one-letter, short, arguments and ... long arguments. They change the default behaviour of such a tool.Short arguments are prefixed with a single dash -Long arguments are prefixed with a double dash --Short arguments can be combined into ls -l -t -r is the same as ls -ltr.Long arguments need to be distinguished from combined singles, and to do that, a long argument is prefixed with a double dash ls -l -t --reverse or ls -lt --reverseLong arguments are easier to remember, short ones faster to type.Most commands have a manual page which explains these arguments in detail. Eg. man ls for the manual page of the ls command which I used in my examples above.